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金属凝固原理
专著 | 2010-09-01 | 西安交通大学出版社
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Abstract :

本书运用凝固过程传热及传质的基本原理,重点阐述了凝固过程中溶质元素的分布及凝固组织的形成规律,并尽可能地结合图解与数学给予定性或定量的描述。在此基础上,介绍了几种典型的凝固技术及其凝固组织的控制原理、方法和思路。全书共分11章:第1章简要介绍了凝固成形的基本问题与发展概况;第2-6章主要阐述了凝固过程的基本原理,包括凝固热力学与动力学、凝固过程的溶质再分配、固-液界面理论与晶体生长规律以及凝固过程中液态金属的流动等;第7章介绍了凝固组织与偏析的形成及其控制原理和方法;第8-11章重点介绍了几种典型凝固技术,包括定向凝固技术、快速凝固技术、连续铸造以及复合材料制备中的凝固问题。各章均附有习题,全书末附有参考文献。

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GB/T 7714 高义民 . 金属凝固原理 [M] . 西安 : . 西安交通大学出版社 , . 2010-09-01 .
MLA 高义民 . "金属凝固原理" . 西安 : . 西安交通大学出版社 , . 2010-09-01 .
APA 高义民 . 金属凝固原理 . 西安 : . 西安交通大学出版社 , . 2010-09-01 .
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Influence of heat treatment on microstructures and properties of Nd8Fe78B6Co4 Alloy CPCI-S SCIE
会议论文 | 2006 , 24 , 379-381 | 2nd International Conference on Rare Earth Research and Applications | IF: 0.368
WoS CC Cited Count: 3
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Abstract :

Melt-spun Nd8Fe78B6Co4 magnetic powders and their bonded magnets were prepared with the optimization of compositions and preparation techniques. The microstructure change of alloy NdFeB and the relation between microstructure and heat-treatment were studied. The heat-treatment temperature is 200 similar to 700 degrees C. The as-cast structure of the alloy is typically amorphous. Different melt-spun speed and different heat treatment could result in different magnetic properties of NdFeB magnets. Magnetic properties of NdFeB increase with the addition of element Co. The magnetic properties of magnet alloy get the best when the melt-spun speed reaches 23 similar to 26 m(center dot)s(-1) heat treatment temperature is 690 degrees C and time is 30 min.

Keyword :

rare earths Nd8Fe78B6Co4 quenched powder magnetic property bonded NdFeB

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GB/T 7714 Zhao Haofeng , Liu Hongmei , Su Junyi . Influence of heat treatment on microstructures and properties of Nd8Fe78B6Co4 Alloy [C] . 2006 : 379-381 .
MLA Zhao Haofeng 等. "Influence of heat treatment on microstructures and properties of Nd8Fe78B6Co4 Alloy" . (2006) : 379-381 .
APA Zhao Haofeng , Liu Hongmei , Su Junyi . Influence of heat treatment on microstructures and properties of Nd8Fe78B6Co4 Alloy . (2006) : 379-381 .
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Grain refinement effect of La-2(CO3)(3) on AZ91 magnesium alloy CPCI-S SCIE CSCD
会议论文 | 2006 , 25 , 160-162 | 10th China/Korea Workshop on Advanced Materials | IF: 0.378
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Abstract :

The La-2(CO3)(3) addition makes the grain of AZ91 alloy be refined obviously. The average primary dendrite size of the alloy decreases from 150 to 50 mu m. The microstructure of typical dendrite turns into the equal-axed grain with the addition of 2.5 wt. % La-2(CO3)(3) refiner. The mechanical properties tests indicate that the tensile strength and especially elongation of the alloys are improved with the addition of La-2(CO3)(3) and their maximum enhancing rates based on the La-2 (CO3)(3)-free AZ91 alloy are 26% and 5.2 times at 2.5 wt. % Lag (CO3)(3) refiner respectively.

Keyword :

mechanical properties La-2(CO3)(3) AZ91 alloy microstructure

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GB/T 7714 Ling, Wang , Zhao Haofeng , Guo Shengli et al. Grain refinement effect of La-2(CO3)(3) on AZ91 magnesium alloy [C] . 2006 : 160-162 .
MLA Ling, Wang et al. "Grain refinement effect of La-2(CO3)(3) on AZ91 magnesium alloy" . (2006) : 160-162 .
APA Ling, Wang , Zhao Haofeng , Guo Shengli , Su Junyi . Grain refinement effect of La-2(CO3)(3) on AZ91 magnesium alloy . (2006) : 160-162 .
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Contact of coated systems under sliding conditions EI SCIE Scopus
期刊论文 | 2006 , 128 (4) , 886-890 | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME | IF: 0.81
WoS CC Cited Count: 5 SCOPUS Cited Count: 6
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Abstract :

The contact of coated systems under sliding conditions is considered within the framework of elasticity theory with the assumption of perfect bond between coating and substrate. Formulation is introduced in the form of a system of coupled singular integral equations of the second kind with Cauchy kernels that describe contact problems for coated bodies under complete, semi-complete and incomplete contact conditions. Accurate and efficient numerical method for the solution of sliding contact problems is described. Explicit results are presented for the interpolative Gauss-Jacobi numerical integration scheme for singular integral equations of the second kind with Cauchy kernels. The method captures correctly both regular and singular behavior of the traction distribution near the edges of contact. Several cases of sliding contact are considered to demonstrate the validity of the method.

Keyword :

contact mechanics coating systems singular integral equation

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GB/T 7714 Ma, Lifeng , Korsunsky, Alexander M. , Sun, Kun . Contact of coated systems under sliding conditions [J]. | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME , 2006 , 128 (4) : 886-890 .
MLA Ma, Lifeng et al. "Contact of coated systems under sliding conditions" . | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME 128 . 4 (2006) : 886-890 .
APA Ma, Lifeng , Korsunsky, Alexander M. , Sun, Kun . Contact of coated systems under sliding conditions . | JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME , 2006 , 128 (4) , 886-890 .
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