The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy

doi:10.1016/j.matchar.2019.110032

IMR OpenIR

	The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy
	Liu, Haiquan 1,2; Pang, Jianchao 1; Wang, Meng 1,2; Li, Shouxin 1; Zhang, Zhefeng 1,2
通讯作者	Pang, Jianchao(jcpang@imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn)
	2020
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	159 页码:9
摘要	Microstructure evolution and mechanical properties of a multiphase AlSi12Cu4MgNi2 alloy under high temperature exposure in a wide range of 200 degrees C to 425 degrees C were investigated. The results showed that the major precipitate theta' in matrix grew coarser, then transformed to theta as the exposure temperature increased from 200 degrees C to 350 degrees C, and it precipitated again after exposed at 425 degrees C due to the natural ageing effect. Precipitates containing Mn and Si formed at 300-350 degrees C. The yield strength (YS), ultimate tensile strength (UTS) and matrix hardness decreased as the exposure temperature increased until 300 degrees C where both UTS and YS reached the minimum values, and they increased as the exposure temperature increased to 425 degrees C. The effect of Si and intermetallic phases on tensile damage mechanism was also studied using in-situ tensile tests. It was found that the damage initiated by Si and intermetallic phases cracking and the cracking increased as strain increased. The coalescence of those micro-cracks led to the macroscopic failure of the alloy. Based on the damage mechanism a relationship between strength and phases volume fraction and matrix hardness was established. The predicted strength was in good agreement with the experimental results.
关键词	Multiphase Al-Si alloy Thermal exposure Microstructural evolution Mechanical properties Damage mechanism
资助者	National Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program
DOI	10.1016/j.matchar.2019.110032
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51871224] ; LiaoNing Revitalization Talents Program[XLYC1808027]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:000509819000062
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/137506
专题	中国科学院金属研究所
通讯作者	Pang, Jianchao; Zhang, Zhefeng
作者单位	1.Chinese Acad Sci, Inst Met Res, Mat Fatigue & Fracture Lab, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Liu, Haiquan,Pang, Jianchao,Wang, Meng,et al. The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy[J]. MATERIALS CHARACTERIZATION,2020,159:9.
APA	Liu, Haiquan,Pang, Jianchao,Wang, Meng,Li, Shouxin,&Zhang, Zhefeng.(2020).The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy.MATERIALS CHARACTERIZATION,159,9.
MLA	Liu, Haiquan,et al."The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy".MATERIALS CHARACTERIZATION 159(2020):9.