Microstructure and micro-mechanical properties of Cu based amorphous composites with shape-memory crystals

	Microstructure and micro-mechanical properties of Cu based amorphous composites with shape-memory crystals
	Yuan, Xiaopeng 1,2; Zhao, Yanchun 1,2; Kou, Shengzhong 1,2; Zhao, Zhiping 1,2; Li, Chun-Yan 1,2; Yuan, Zizhou 1,2
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.