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	RARE METAL MATERIALS AND ENGINEERING
	2017-01
卷号	46 期号:1 页码:35-38
关键词	bulk metallic glass composites shape-memory crystals micro-mechanical behavior self-healing
ISSN号	1002-185X
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.
资助项目	National Natural Science Foundation of China[51551101][51661017][51571105] ; Specialized Research Fund for the Doctoral Program of Higher Education[20116201120003] ; Natural Science Foundation of Zhejiang Province of China[LQ13E010002] ; Scientific Research Project of the Higher Education Institutions of Gansu Province[2013A-040]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000393538900007
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33426]
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
通讯作者	Zhao Yanchun
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Wenzhou Res Inst Pump & Valve Engn, Wenzhou 325105, Peoples R 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]. 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.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".RARE METAL MATERIALS AND ENGINEERING 46.1(2017):35-38.