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Grain size-dependent Sc microalloying effect on the yield strength-pitting corrosion correlation in Al-Cu alloys EI SCIE Scopus
期刊论文 | 2018 , 721 , 200-214 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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Abstract :

Coarse-grained (CG), fine-grained (FG), and ultrafine-grained (UFG) Al-2.5 wt% Cu (Al-Cu) alloys were respectively prepared, with and without 0.3 wt% Sc addition, for comparison. The influences of minor Sc addition on the microstructural evolution, tensile mechanical properties and pitting corrosion resistance were system. atically studied at different grain scales. A significant Sc microalloying effect on the precipitation was observed that the minor Sc addition promoted the dispersion of finer theta'-Al2Cu precipitates in the CG alloy and favored the intragranular theta'-Al2Cu precipitation in the FG and UFG alloys, with the smaller grain size leading to a stronger Sc microalloying effect. The Sc addition induced convincing increases in the yield strength at all the three grain scales, and improved (in the CG and UFG Al-Cu alloys) or retained (in the FG Al-Cu alloy) the pitting corrosion resistance at the same time. This indicates that the inverse strength-pitting corrosion correlation as usually observed can be broken by minor Sc addition. The strengthening mechanisms were discussed and the grain size dependent pitting corrosion resistance mediated by the Sc addition was rationalized in terms of a competition between the positive influence derived from the interfacial Sc segregation and the negative influence come from the deformation-induced dislocations. The present findings provide a possible approach to break the inverse strength-pitting resistance correlation in heat-treatable Al alloys by modifying the precipitate/matrix interfaces through the suitable microalloying atom segregation.

Keyword :

Al alloys Grain size effect Interfacial segregation Microalloying Strength and corrosion

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GB/T 7714 Wu, S. H. , Zhang, P. , Shao, D. et al. Grain size-dependent Sc microalloying effect on the yield strength-pitting corrosion correlation in Al-Cu alloys [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 721 : 200-214 .
MLA Wu, S. H. et al. "Grain size-dependent Sc microalloying effect on the yield strength-pitting corrosion correlation in Al-Cu alloys" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 721 (2018) : 200-214 .
APA Wu, S. H. , Zhang, P. , Shao, D. , Cheng, P. M. , Kuang, J. , Wu, K. et al. Grain size-dependent Sc microalloying effect on the yield strength-pitting corrosion correlation in Al-Cu alloys . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 721 , 200-214 .
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Fiber Laser Welding of Fuel Cladding and End Plug Made of La2O3 Dispersion-Strengthened Molybdenum Alloy EI SCIE PubMed Scopus
期刊论文 | 2018 , 11 (7) | MATERIALS
WoS CC Cited Count: 1 SCOPUS Cited Count: 2
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Abstract :

The study investigated the laser lap welding of fuel cladding and end plug made of molybdenum (Mo) alloy. The research results showed that the tensile strength of the welded joint when a weld was located at the Mo tube was significantly larger than that at the fit-up gap between the fuel cladding and end plug. Moreover, preheating can also greatly increase the tensile strength of the lap joint. The weld zone was filled with bulky coarse columnar crystal structures while there were numerous coarse recrystallized structures in the heat affected zone (HAZ). The weld zone and HAZ were both subjected to a significant softening. The tensile strength and elongation rate of fuel cladding made of Mo alloy were about 750 MPa and 36.7%, respectively. The welded joint did not undergo any plastic deformation during the tensile process and presented a brittle fracture. Under the optimum processing conditions, the tensile strength of the welded joint reached 617 MPa, taking up 82.3% that of the base metal. The results of composition analysis indicated that there was only Mo inside the columnar crystals in weld zone while significant oxygen segregation was observed at the grain boundary. This was the main reason causing that the strength of welded joint was lower than that of the base metal. Additionally, under the optimum processing conditions, there were numerous slender columnar crystals on the cross section of the joint entering the weld zone in fuel cladding side from that in end plug side where the crystals were nucleated and grew upwards. The analysis results suggested that the presence of these slender columnar crystals crossing the interface between fuel cladding and end plug was favorable for improving the capacity of the joint for bearing the shear loads.

Keyword :

end plug fuel cladding lap joint laser welding molybdenum alloy

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GB/T 7714 An, Geng , Sun, Jun , Sun, Yuanjun et al. Fiber Laser Welding of Fuel Cladding and End Plug Made of La2O3 Dispersion-Strengthened Molybdenum Alloy [J]. | MATERIALS , 2018 , 11 (7) .
MLA An, Geng et al. "Fiber Laser Welding of Fuel Cladding and End Plug Made of La2O3 Dispersion-Strengthened Molybdenum Alloy" . | MATERIALS 11 . 7 (2018) .
APA An, Geng , Sun, Jun , Sun, Yuanjun , Cao, Weicheng , Zhu, Qi , Bai, Qinglin et al. Fiber Laser Welding of Fuel Cladding and End Plug Made of La2O3 Dispersion-Strengthened Molybdenum Alloy . | MATERIALS , 2018 , 11 (7) .
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Ultrastrong Al0.1CoCrFeNi high-entropy alloys at small scales: effects of stacking faults vs. nanotwins EI SCIE PubMed Scopus
期刊论文 | 2018 , 10 (28) , 13329-13334 | NANOSCALE
WoS CC Cited Count: 3 SCOPUS Cited Count: 3
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Abstract :

Metastability engineering opens a new avenue to design high-entropy alloys (HEAs) originally proposed to benefit from phase stabilization. Meanwhile, boundary engineering via embedding planar defects such as stacking faults and nanotwins into the matrix of metals provides them with unique mechanical properties. In this work, for the first time, we combine the above two strategies to prepare Al0.1CoCrFeNi HEA pillars populated with a high density of stacking faults and nanotwins. It is uncovered that the stacking faulted (SF) Al0.1CoCrFeNi HEA pillars manifest ultrahigh strength exceeding 4.0 GPa and considerable compressive plasticity over 15%, much superior to their nanotwinned (NT) counterparts. Compared with the nanotwins undergoing detwinning during plastic deformation, the stacking faults in Al0.1CoCrFeNi high-entropy alloy thin films (HEAFs) are quite stable to hinder dislocation motion. Our findings not only endow the Al0.1CoCrFeNi HEAs with a predominant combination of strength and compression deformability, but also shed light on a new perspective for overcoming the strength and ductility trade-off in structural materials.

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GB/T 7714 Feng, Xiaobin , Zhang, Jinyu , Wu, Kai et al. Ultrastrong Al0.1CoCrFeNi high-entropy alloys at small scales: effects of stacking faults vs. nanotwins [J]. | NANOSCALE , 2018 , 10 (28) : 13329-13334 .
MLA Feng, Xiaobin et al. "Ultrastrong Al0.1CoCrFeNi high-entropy alloys at small scales: effects of stacking faults vs. nanotwins" . | NANOSCALE 10 . 28 (2018) : 13329-13334 .
APA Feng, Xiaobin , Zhang, Jinyu , Wu, Kai , Liang, Xiaoqing , Liu, Gang , Sun, Jun . Ultrastrong Al0.1CoCrFeNi high-entropy alloys at small scales: effects of stacking faults vs. nanotwins . | NANOSCALE , 2018 , 10 (28) , 13329-13334 .
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Nanoindentation creep behavior of Cu-Zr metallic glass films SCIE Scopus
期刊论文 | 2018 , 6 (1) , 22-28 | MATERIALS RESEARCH LETTERS
WoS CC Cited Count: 2 SCOPUS Cited Count: 4
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Abstract :

The size-dependent hardness, strain-rate sensitivity (SRS) and shear transformation zone (STZ) volume of co-sputtered Cu-Zr metallic glass films with film thickness h spanning from 1000 to 3000 nm were systematically investigated by nanoindentation creep tests at room temperature. Experimental results manifested an exceptional decrease in hardness and a monotonic increment in SRS (or a monotonic decline in STZ volume) with reducing h. The deformation mechanism could be rationalized in light of more free volume combined with smaller STZs in thinner films, which likely trigger the strain-softening behavior. Moreover, STZs and deformation-induced devitrification promote the homogeneous-like plastic flow. IMPACT STATEMENT Employing nanoindentation creep tests revealed size-dependent hardness and strain-rate sensitivity in metallic glass films, enabling comprehensive understanding of the deformation mechanism based on atomic-scale shear transformation zone theory.

Keyword :

hardness Metallic glass films nanoindentation strain-rate sensitivity

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GB/T 7714 Wang, Yaqiang , Zhang, Jinyu , Wu, Kai et al. Nanoindentation creep behavior of Cu-Zr metallic glass films [J]. | MATERIALS RESEARCH LETTERS , 2018 , 6 (1) : 22-28 .
MLA Wang, Yaqiang et al. "Nanoindentation creep behavior of Cu-Zr metallic glass films" . | MATERIALS RESEARCH LETTERS 6 . 1 (2018) : 22-28 .
APA Wang, Yaqiang , Zhang, Jinyu , Wu, Kai , Liu, Gang , Kiener, Daniel , Sun, Jun . Nanoindentation creep behavior of Cu-Zr metallic glass films . | MATERIALS RESEARCH LETTERS , 2018 , 6 (1) , 22-28 .
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Unraveling the discrepancies in size dependence of hardness and thermal stability in crystalline/amorphous nanostructured multilayers: Cu/Cu-Ti vs. Cu/HfO2 EI SCIE PubMed Scopus
期刊论文 | 2018 , 10 (29) , 14331-14341 | NANOSCALE
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Crystalline/amorphous interfaces (CAIs) confer outstanding mechanical properties on crystalline/amorphous nanostructured multilayers (C/ANMs), which are widely used in micro/nanodevices, because their unique interfacial structure possesses high strain compatibility. In this study, Cu/X (X = Cu-Ti, HfO2) C/ANMs with equal layer thicknesses (h) were comparatively investigated in terms of size-dependent hardness (H) and thermal stability to uncover the fundamental difference(s) between Cu/Cu-Ti and Cu/HfO2. It was found that both as-deposited Cu/Cu-Ti and Cu/HfO2 C/ANMs exhibited a maximum hardness at a critical thickness of h similar to 30 nm, which was caused by a transition from confined dislocation gliding to dislocation transmission across the interface. Specifically, the Cu/Cu-Ti C/ANMs exhibited annealing hardening, whereas the Cu/HfO2 C/ANMs exhibited annealing softening associated with a minimum softening at h similar to 30 nm, which was closely correlated with their thermal stability. In comparison with monolithic amorphous X thin films, the glassy X nanolayers in the present Cu/X C/ANMs exhibited reduced thermal stability and a trend that smaller sizes led to higher stability. The underlying mechanism of the size-dependent crystallization behavior of X nanolayers is discussed in terms of the constraining effects of the interface. These findings provide deep insights into the design of Cu/metallic-glass and Cu/ceramic-glass C/ANMs with optimal performance.

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GB/T 7714 Yue, T. , Wang, Y. Q. , Zhang, J. Y. et al. Unraveling the discrepancies in size dependence of hardness and thermal stability in crystalline/amorphous nanostructured multilayers: Cu/Cu-Ti vs. Cu/HfO2 [J]. | NANOSCALE , 2018 , 10 (29) : 14331-14341 .
MLA Yue, T. et al. "Unraveling the discrepancies in size dependence of hardness and thermal stability in crystalline/amorphous nanostructured multilayers: Cu/Cu-Ti vs. Cu/HfO2" . | NANOSCALE 10 . 29 (2018) : 14331-14341 .
APA Yue, T. , Wang, Y. Q. , Zhang, J. Y. , Wu, K. , Li, G. , Kuang, J. et al. Unraveling the discrepancies in size dependence of hardness and thermal stability in crystalline/amorphous nanostructured multilayers: Cu/Cu-Ti vs. Cu/HfO2 . | NANOSCALE , 2018 , 10 (29) , 14331-14341 .
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From size-dependent strengthening to softening in nanolaminated Cu/Cu-Zr crystalline/amorphous micropillars EI SCIE Scopus
期刊论文 | 2018 , 732 , 29-34 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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Microcompressive tests were performed to investigate the intrinsic modulation effect and extrinsic diameter effect on strength and deformation behaviors of nanolaminated Cu/Cu-Zr crystalline/amorphous micropillars within a diameter D range from 300 to 1500 nm as well as a modulation ratio eta range from 0.1 to 3.0. Experimental results revealed a transition of D-dependent deformation mode from homogeneous-like to shear localization at large eta, while D-independent homogeneous extrusion of Cu at small eta. Furthermore, the flow strength increased with raising D at small eta, but decreased at large eta, exhibiting a D-insensitive strength at a critical eta* similar to 0.5. These unusual results were rationalized in terms of a coupling effect of dislocation actions and shear transformation zone mediated operations.

Keyword :

Crystalline/amorphous nanolaminates Deformation behavior Flow stress Micropillars Size effect

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GB/T 7714 Wang, Y. Q. , Liang, X. Q. , Wu, K. et al. From size-dependent strengthening to softening in nanolaminated Cu/Cu-Zr crystalline/amorphous micropillars [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 732 : 29-34 .
MLA Wang, Y. Q. et al. "From size-dependent strengthening to softening in nanolaminated Cu/Cu-Zr crystalline/amorphous micropillars" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 732 (2018) : 29-34 .
APA Wang, Y. Q. , Liang, X. Q. , Wu, K. , Zhang, J. Y. , Liu, G. , Sun, J. . From size-dependent strengthening to softening in nanolaminated Cu/Cu-Zr crystalline/amorphous micropillars . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 732 , 29-34 .
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Alloying effects on the microstructure and mechanical properties of nanocrystalline Cu-based alloyed thin films: Miscible Cu-Ti vs immiscible Cu-Mo EI SCIE Scopus
期刊论文 | 2018 , 143 , 55-66 | ACTA MATERIALIA
WoS CC Cited Count: 6 SCOPUS Cited Count: 7
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Abstract :

Tuning the microstructure to optimize the mechanical performance of nanocrystalline Cu thin films via the alloying strategy is quite important for their application in microdevices. In this work, we prepared nanocrystalline miscible Cu-Ti and immiscible Cu-Mo alloyed thin films to investigate alloying effects on the microstructure and mechanical properties of Cu thin films in terms of mixing enthalpies. It is found that the dopants of both Ti and Mo can notably refine the grains, and in particular promote the formation of nanotwins below a critical content of solute, beyond which the formation of nanotwins is notably suppressed. The nonmonotonic solute concentration-dependent twinning behavior observed in Cu-Ti and Cu-Mo alloyed thin films is explained by the coupling effects between grain size and grain boundary segregated dopants that affects the stimulated slip process of partials. The increased hardness of both Cu-Ti and Cu-Mo systems with increasing the solute contents are quantitatively explained by combining several strengthening mechanisms, including solid solution strengthening, grain/twin boundary (GB/TB) strengthening, solute segregation-induced strengthening. It unexpectedly appears that with increasing the solute contents, the Cu-Ti system exhibits monotonically reduced positive strain rate sensitivity (SRS, m), whereas the Cu-Mo system manifests almost constant negative SRS. The fundamental difference in SRS m between Cu-Ti and Cu-Mo is rationalized in terms of the interactions between solute atomic clusters and dislocations based on the cross-core diffusion mechanism. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Keyword :

Alloying Dislocations Grain boundary segregation Mechanical properties Nanocrystalline Cu thin films

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GB/T 7714 Zhang, J. Y. , Zhao, J. T. , Li, X. G. et al. Alloying effects on the microstructure and mechanical properties of nanocrystalline Cu-based alloyed thin films: Miscible Cu-Ti vs immiscible Cu-Mo [J]. | ACTA MATERIALIA , 2018 , 143 : 55-66 .
MLA Zhang, J. Y. et al. "Alloying effects on the microstructure and mechanical properties of nanocrystalline Cu-based alloyed thin films: Miscible Cu-Ti vs immiscible Cu-Mo" . | ACTA MATERIALIA 143 (2018) : 55-66 .
APA Zhang, J. Y. , Zhao, J. T. , Li, X. G. , Wang, Y. Q. , Wu, K. , Liu, G. et al. Alloying effects on the microstructure and mechanical properties of nanocrystalline Cu-based alloyed thin films: Miscible Cu-Ti vs immiscible Cu-Mo . | ACTA MATERIALIA , 2018 , 143 , 55-66 .
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Tuning the microstructure and mechanical properties of magnetron sputtered Cu-Cr thin films: The optimal Cr addition EI SCIE Scopus
期刊论文 | 2018 , 151 , 87-99 | ACTA MATERIALIA
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Grain boundary (GB) engineering via alloying opens a pathway to design the interfaces in alloys for tuning their mechanical properties, thus it is quite critical to determine the optimum addition of alloying element. Here, we prepared immiscible Cu-Cr alloyed thin films by non-equilibrium magnetron sputtering deposition to study Cr alloying effects on the microstructure and mechanical properties of Cu thin films. It is found that Cr doping can notably refine the grains and promote the formation of fully nanotwinned columnar grains at low Cr volume concentrations (<=similar to 3.7 at.%) associated with the average GB Cr concentrations <=similar to 15 at.%, beyond which the formation of nanotwins is significantly suppressed. The role of Cr atoms/clusters played in the twinning process is rationalized in terms of dislocation rebound-promotion mechanism. Importantly, a maximum hardness is discovered at the optimum Cr addition of similar to 2.0 at.%. The Cr concentration-dependent hardness of Cu-Cr alloyed films was quantified by a combined strengthening model. The achievement of the maximum hardness was related to the greatest GB solute segregation-induced strength contribution. It is further uncovered that the Cu-Cr system exhibits strain rate sensitivity (SRS, m) monotonically reduced with increasing the Cr concentration, ranging from a positive m of 0.0314 (for pure Cu) to a negative m of -0.0245, which is attributed to a competition between the dislocation-boundary interactions (increasing m) and the dislocation-solute atoms interactions (decreasing m). These findings provide valuable insights into tuning the composition of alloyed thin films to achieve optimized mechanical performance. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Keyword :

Alloying Mechanical properties Nanostructured Cu-Cr films Nanotwins

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GB/T 7714 Li, X. G. , Cao, L. F. , Zhang, J. Y. et al. Tuning the microstructure and mechanical properties of magnetron sputtered Cu-Cr thin films: The optimal Cr addition [J]. | ACTA MATERIALIA , 2018 , 151 : 87-99 .
MLA Li, X. G. et al. "Tuning the microstructure and mechanical properties of magnetron sputtered Cu-Cr thin films: The optimal Cr addition" . | ACTA MATERIALIA 151 (2018) : 87-99 .
APA Li, X. G. , Cao, L. F. , Zhang, J. Y. , Li, J. , Zhao, J. T. , Feng, X. B. et al. Tuning the microstructure and mechanical properties of magnetron sputtered Cu-Cr thin films: The optimal Cr addition . | ACTA MATERIALIA , 2018 , 151 , 87-99 .
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The influence of Sc solute partitioning on ductile fracture of Sc-microalloyed Al-Cu alloys EI SCIE Scopus
期刊论文 | 2018 , 717 , 113-123 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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Al-XCu (X = 1.0, 1.5, and 2.5 wt%) alloys with and without 0.3 wt% Sc addition were prepared respectively. The effects of composition and heat treatment processes on the microstructural evolution were systematically investigated by using transmission electron microscope and atom probe tomography (APT). Both Al3Sc dispersoids and theta'-Al2Cu precipitates coexisted after artificial aging, and a strong Sc segregation at theta'-Al2Cu/matrix interfaces was detected and quantified through APT examinations. A Sc solute partitioning was demonstrated between in the Al3Sc dispersoids and at the theta'-Al2Cu/matrix interfaces, mediated by the Cu content. Increasing the Cu content, both the size and volume fraction of the Al3Sc decreased after solid solution treatment. As a result, the interfacial Sc segregation was accordingly intensified during subsequent aging treatment. A parameter of reduction in interfacial energy (Delta gamma), derived from APT analyses, was proposed to characterize the degree of interfacial Sc segregation. The coupling effect of Al3Sc dispersoids and theta'-Al2Cu precipitates on ductile fracture was discussed, where a micromechanical model was developed to describe a quantitative relationship between the fracture strain with Delta gamma as well as parameters of the Al3Sc dispersoids.

Keyword :

Aluminum alloys Ductile fracture Interfacial segregation Microalloying effect Solute partitioning

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GB/T 7714 Yang, C. , Shao, D. , Zhang, P. et al. The influence of Sc solute partitioning on ductile fracture of Sc-microalloyed Al-Cu alloys [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 717 : 113-123 .
MLA Yang, C. et al. "The influence of Sc solute partitioning on ductile fracture of Sc-microalloyed Al-Cu alloys" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 717 (2018) : 113-123 .
APA Yang, C. , Shao, D. , Zhang, P. , Gao, Y. H. , Zhang, J. Y. , Kuang, J. et al. The influence of Sc solute partitioning on ductile fracture of Sc-microalloyed Al-Cu alloys . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 717 , 113-123 .
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The effect of precipitates on voiding, twinning, and fracture behaviors in Mg alloys EI SCIE Scopus
期刊论文 | 2018 , 720 , 98-109 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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The effect of precipitates on fracture behaviors was comparatively investigated among three kinds of Mg alloys with different precipitates, i.e., Mg-Gd alloy with prismatic plate-shaped precipitates, Mg-Zn alloy with [0001](alpha) rod-shaped precipitates, and Mg-Gd-Zn-Zr alloy with basal plate-shaped precipitates. By comparing the fracture behaviors of the alloys before and after aging treatment, it was evident that the presence of precipitates greatly promoted the formation of microvoids that were initiated at primary intermetallic particles. Voiding was the most accelerated in the Mg-Gd alloy, where the precipitate-dislocation interactions are the strongest. While in the Mg-Gd-Zn-Zr alloy with the weakest precipitate hardening, the precipitate-facilitated voiding was the least significant. The precipitate-dependent voiding suppressed the twinning behaviors, causing the volume fraction of deformation twins decreased in turn from Mg-Gd-Zn-Zr to Mg-Zn, and finally to Mg-Gd alloys. The tensile ductility of present Mg alloys approximately scaled with the volume fraction of deformation twins, and was highly sensitive to the precipitates. The fracture scenario of present Mg alloys was proposed that the voiding suppressed twinning and the competition between voiding and twinning can be mediated by precipitates. In the Mg-Gd-Zn-Zr alloy with limited voiding, the twinning dominated the deformation process and concomitantly resulted in a great ductility. The formation of microvoids or the fracture of primary intermetallic particles was quantitatively analyzed by applying a Weibull model, where both the alloy strength and the volume fraction of primary intermetallic particles were considered to rationalize the remarkable difference in fracture behaviors among the present three Mg alloys. Furthermore, the coupling contribution of precipitates and twins to the work hardening was modelled in the aged Mg-Gd-Zn-Zr alloy that displayed a large room temperature tensile ductility of similar to 13.5%.

Keyword :

Ductility Fracture mechanism Magnesium alloys Precipitates Twin

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GB/T 7714 Fu, Wei , Wang, Ruihong , Zhang, Jinyu et al. The effect of precipitates on voiding, twinning, and fracture behaviors in Mg alloys [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 720 : 98-109 .
MLA Fu, Wei et al. "The effect of precipitates on voiding, twinning, and fracture behaviors in Mg alloys" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 720 (2018) : 98-109 .
APA Fu, Wei , Wang, Ruihong , Zhang, Jinyu , Wu, Kai , Liu, Gang , Sun, Jun . The effect of precipitates on voiding, twinning, and fracture behaviors in Mg alloys . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2018 , 720 , 98-109 .
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