Microstructure and micro-mechanical properties of Cu based amorphous composites with shape-memory crystals | |
Yuan, Xiaopeng1,2; Zhao, Yanchun1,2; Kou, Shengzhong1,2; Zhao, Zhiping1,2; Li, Chun-Yan1,2; Yuan, Zizhou1,2 | |
刊名 | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
2017 | |
卷号 | 46期号:1页码:35-38 |
关键词 | Aluminum alloys Casting Crack closure Glass Martensitic transformations Metallic glass Microhardness Self-healing materials Shrinkage Stress analysis Ternary alloys Zircaloy Bulk metallic glass composites Micromechanical behavior Micromechanical property Reverse transformation temperature Self-healing Shape memory Stress-induced martensite Vickers indentation cracks |
ISSN号 | 1002185X |
英文摘要 | Tapered Cu50Zr42Al8 alloy with good glass-forming ability was fabricated by copper mould suction casting. Cubic AlCu2Zr and B2-ZrCu, thermal-induced martensitic B19'-ZrCu phases form on the glass matrix along the radial direction structure. Size effects on micro-mechanical properties and a unique crack healing behavior were studied. Micro-hardness of monolithic bulk metallic glass (BMG) displays "smaller is softer" trend, that is, the softer surface and the harder center. Whereas the lager size composites possess a softer center and a harder surface, due to the integrative action of the secondary phases. Amorphous matrix is toughened by TRIP (transition induced plasticity) effect of shape-memory phase as well as weakened and embrittled by AlCu2Zr crystal. After annealing, self-healing of Vickers indentation crack occurs as the thermoelastic transformation of shape-memory crystals. As loading, stress-induced martensites transform from B2 to B19', along with volume expansion. Annealed upon the reverse transformation temperature, B19' to B2 transform accompanied by a volume shrinkage, and a restoring force from the structure stress is set up to drive the crack closure. Copyright © 2017, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved. |
WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | Rare Metals Materials and Engineering Press |
WOS记录号 | WOS:000393538900007 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/114389] |
专题 | 材料科学与工程学院 省部共建有色金属先进加工与再利用国家重点实验室 |
作者单位 | 1.State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Wenzhou Research Institute of Pump and Valve Engineering of Lanzhou University of Technology, Wenzhou; 325105, China |
推荐引用方式 GB/T 7714 | Yuan, Xiaopeng,Zhao, Yanchun,Kou, Shengzhong,et al. Microstructure and micro-mechanical properties of Cu based amorphous composites with shape-memory crystals[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2017,46(1):35-38. |
APA | Yuan, Xiaopeng,Zhao, Yanchun,Kou, Shengzhong,Zhao, Zhiping,Li, Chun-Yan,&Yuan, Zizhou.(2017).Microstructure and micro-mechanical properties of Cu based amorphous composites with shape-memory crystals.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,46(1),35-38. |
MLA | Yuan, Xiaopeng,et al."Microstructure and micro-mechanical properties of Cu based amorphous composites with shape-memory crystals".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 46.1(2017):35-38. |
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