Tension-compression mechanical behavior and corresponding microstructure evolution of cast A356-T6 aluminum alloy

doi:10.1016/j.msea.2021.141613

CORC > 金属研究所 > 中国科学院金属研究所

	Tension-compression mechanical behavior and corresponding microstructure evolution of cast A356-T6 aluminum alloy
	Yang, Baocheng 1,2; Song, Hongwu 1; Wang, Songwei 1; Chen, Shuaifeng 1; Zhang, Shihong 1
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2021-07-21
卷号	821 页码:11
关键词	A356-T6 aluminum alloy Eutectic silicon Microstructure evolution Strain accommodation
ISSN号	0921-5093
DOI	10.1016/j.msea.2021.141613
通讯作者	Song, Hongwu(hwsong@imr.ac.cn)
英文摘要	It is crucial to clarify the intrinsic deformation and damage behaviors of casting materials under different loading conditions for establishing the material damage model and accurately predicting the security performance of cast components. In this study, uniaxial tensile and compressive tests were performed to investigate the complete mechanical behavior of cast A356-T6 aluminum alloy at room temperature, and the corresponding microstructure evolution were analyzed. The tensile and compressive specimens were prepared at porosity-free locations on a low pressure die cast A356 wheel subjected to T6 heat treatment to avoid premature fracture caused by initial cast pores. The results show that negligible asymmetry in yielding and hardening behaviors is observed between tension and compression, but obvious differences in ductility exhibit. Specifically, the elongation for tension is limited to 15%, but reaches over a strain of 1.2 for compression. Additionally, microcracks during tension are prone to be initiated at the interface between Si and Al matrix, which mainly propagates in the Al dendrites, and finally leads to the fracture. While the dominant strain accommodated mechanism shifts with strain levels in compression. It evolves from the incipient plastic deformation inside grains at initial strain stage to the sliding of fragmented dendrite assisted by eutectic silicon particles at later stage, which may be the main reason for the superior ductility during compression.
资助项目	National Natural Science Foundation of China[51875547] ; Institute of Metal Research, Chinese Academy of Sciences[E055A501]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000672444600002
资助机构	National Natural Science Foundation of China ; Institute of Metal Research, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160092]
专题	金属研究所_中国科学院金属研究所
通讯作者	Song, Hongwu
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, Baocheng,Song, Hongwu,Wang, Songwei,et al. Tension-compression mechanical behavior and corresponding microstructure evolution of cast A356-T6 aluminum alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,821:11.
APA	Yang, Baocheng,Song, Hongwu,Wang, Songwei,Chen, Shuaifeng,&Zhang, Shihong.(2021).Tension-compression mechanical behavior and corresponding microstructure evolution of cast A356-T6 aluminum alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,821,11.
MLA	Yang, Baocheng,et al."Tension-compression mechanical behavior and corresponding microstructure evolution of cast A356-T6 aluminum alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 821(2021):11.