Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy

doi:10.1016/j.msea.2021.141762

IMR OpenIR

	Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy
	Liu, H. Q.1; Pang, J. C.1,2; Wang, M.1; Li, S. X.1; Zhang, Z. F.1,2
通讯作者	Pang, J. C.(jcpang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2021-09-08
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	824 页码:10
摘要	High-temperature performance is a key factor to concern for the application of cast Al-Si alloys. The evolution of microstructures and mechanical properties of a multiphase Al-Si-Cu-Mg-Ni-Ce alloy during tension in a temperature range from 25 degrees C (ambient temperature) to 425 degrees C was investigated. The results show that the main strengthening precipitates of the alloy are theta' and Q phases. They are stable at 25-250 degrees C, while dissolve rapidly above 250 degrees C during tension. The damage initiates and propagates in the form of cracking of brittle phases. The fracture mechanism transforms from quasi-cleavage to coexistence of quasi-cleavage and dimple as temperature increases. The Ce-bearing phase Al20Ti2Ce promotes the damage occurrence below 350 degrees C while hinders crack propagation at 425 degrees C. The ultimate tensile strength (UTS) and yield strength (YS) decrease as the tensile temperature increases. The decreasing rate of UTS can be divided into three stages which is associated with the decreasing rate of strengthening precipitates. An empirical constitutive equation is proposed to describe the relationship between UTS and tensile temperature. It provides a good estimation for both cast and wrought Al alloys and the predicted strengths are in good agreement with the experimental results.
关键词	Cast Al-Si alloy High-temperature tension Strengthening precipitate Constitutive equation
资助者	National Nat-ural Science Foundation of China (NSFC) ; Liao Ning Revitalization Talents Program
DOI	10.1016/j.msea.2021.141762
收录类别	SCI
语种	英语
资助项目	National Nat-ural Science Foundation of China (NSFC)[51871224] ; Liao Ning 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:000689227900002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：38[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/321006/166868
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, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 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, H. Q.,Pang, J. C.,Wang, M.,et al. Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,824:10.
APA	Liu, H. Q.,Pang, J. C.,Wang, M.,Li, S. X.,&Zhang, Z. F..(2021).Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,824,10.
MLA	Liu, H. Q.,et al."Effect of temperature on the mechanical properties of Al-Si-Cu-Mg-Ni-Ce alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 824(2021):10.