Effect of constraint factor on the thermo-mechanical fatigue behavior of an Al-Si eutectic alloy

doi:10.1016/j.msea.2020.139279

IMR OpenIR

	Effect of constraint factor on the thermo-mechanical fatigue behavior of an Al-Si eutectic alloy
	Wang, M.1,2; Pang, J. C.1; Liu, H. Q.1,2; Li, S. X.1; Zhang, M. X.1; Zhang, Z. F.1
通讯作者	Pang, J. C.(jcpang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2020-05-05
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	783 页码:10
摘要	The thermo-mechanical fatigue (TMF) behaviors and corresponding damage mechanisms of Al-Si piston alloy were investigated in the temperature range of 120 similar to 425 degrees C under different constraint factors (eta). The TMF hysteresis loops exhibit asymmetrical, because the yield strength and elastic modulus decrease significantly with the increasing temperature. Taking the phase angles into consideration, the mean tensile stress for out of phase TMF (OP-TMF, eta < 0) and mean compressive stress for in-phase TMF (IP-TMF, eta > 0) can be found. The fatigue life of IP-TMF is longer than that of OP-TMF except for higher constraint factor, and the life of TMF decreases with the increasing absolute value of eta. There are two different crack initiation mechanisms under the constrain TMF: primary phases broken mainly for OP-TMF and matrix deboned mainly for IP-TMF. The oxidation may have only little influence on the crack behavior and TMF life, considering the obvious damage by deboned or broken primary phases. The tensile stress is key factor for fatigue crack initiation and growth in primary phases (Si and intermetallic) under cyclic deformation. The TMF life under different constrain factors can be predicted by the strain energy model with good precision.
关键词	Thermo-mechanical fatigue Al-Si eutectic alloy Constraint factor Damage mechanism Life prediction
资助者	National Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program
DOI	10.1016/j.msea.2020.139279
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	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000528267700004
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：25[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/321006/138514
专题	中国科学院金属研究所
通讯作者	Pang, J. C.; Zhang, Z. F.
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	Wang, M.,Pang, J. C.,Liu, H. Q.,et al. Effect of constraint factor on the thermo-mechanical fatigue behavior of an Al-Si eutectic alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,783:10.
APA	Wang, M.,Pang, J. C.,Liu, H. Q.,Li, S. X.,Zhang, M. X.,&Zhang, Z. F..(2020).Effect of constraint factor on the thermo-mechanical fatigue behavior of an Al-Si eutectic alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,783,10.
MLA	Wang, M.,et al."Effect of constraint factor on the thermo-mechanical fatigue behavior of an Al-Si eutectic alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 783(2020):10.