Tensile Strength Evolution and Damage Mechanisms of Al-Si Piston Alloy at Different Temperatures

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	Tensile Strength Evolution and Damage Mechanisms of Al-Si Piston Alloy at Different Temperatures
	Wang, M; Pang, JC; Qiu, Y; Liu, HQ; Li, SX; Zhang, ZF; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.; Zhang, ZF (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China.
刊名	ADVANCED ENGINEERING MATERIALS
	2018-02-01
卷号	20 期号:2 页码:-
关键词	Cycle Fatigue Behavior Aluminum-alloy Microstructure Evolution Deformation-behavior Stress States Particles Mg Fracture Silicon Additions
ISSN号	1438-1656
英文摘要	The Al-Si piston alloys always bear different temperatures because of its peculiar component structure and service condition. Therefore, the tensile strength, elongation to fracture, and corresponding damage mechanisms of Al12SiCuNiMg piston alloys (ASPA) have been investigated with in situ technique at different temperatures. The tensile properties show two-stage tendencies: the former stage (25-280 degrees C) is determined by easily broken phases with inherent brittleness (such as primary Si), and the fracture behavior presents rapid brittle fracture after reaching the critical stress (about 430MPa, based on in situ technique and the elastic stress field model). The later one (280-425 degrees C) is dominated by particles debonding and phase coarsening. The plastic deformation behavior, dynamic recovery, and flow process become more significant on account of thermal activation. The Considere criterion h=K indicates that the transition of damage behaviors from insufficient local strength to insufficient matrix strength and the corresponding failure model shifts from brittle to ductile fracture. Based on the damage mechanisms, the elastic field model and thermal activation relation model have been established to characterize the strength of the ASPA at different temperature ranges.; The Al-Si piston alloys always bear different temperatures because of its peculiar component structure and service condition. Therefore, the tensile strength, elongation to fracture, and corresponding damage mechanisms of Al12SiCuNiMg piston alloys (ASPA) have been investigated with in situ technique at different temperatures. The tensile properties show two-stage tendencies: the former stage (25-280 degrees C) is determined by easily broken phases with inherent brittleness (such as primary Si), and the fracture behavior presents rapid brittle fracture after reaching the critical stress (about 430MPa, based on in situ technique and the elastic stress field model). The later one (280-425 degrees C) is dominated by particles debonding and phase coarsening. The plastic deformation behavior, dynamic recovery, and flow process become more significant on account of thermal activation. The Considere criterion h=K indicates that the transition of damage behaviors from insufficient local strength to insufficient matrix strength and the corresponding failure model shifts from brittle to ductile fracture. Based on the damage mechanisms, the elastic field model and thermal activation relation model have been established to characterize the strength of the ASPA at different temperature ranges.
学科主题	Materials Science, Multidisciplinary
语种	英语
资助机构	National Natural Science Foundation of China (NSFC) [51331007]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79537]
专题	金属研究所_中国科学院金属研究所
通讯作者	Pang, JC; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.; Zhang, ZF (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China.
推荐引用方式 GB/T 7714	Wang, M,Pang, JC,Qiu, Y,et al. Tensile Strength Evolution and Damage Mechanisms of Al-Si Piston Alloy at Different Temperatures[J]. ADVANCED ENGINEERING MATERIALS,2018,20(2):-.
APA	Wang, M.,Pang, JC.,Qiu, Y.,Liu, HQ.,Li, SX.,...&Zhang, ZF .(2018).Tensile Strength Evolution and Damage Mechanisms of Al-Si Piston Alloy at Different Temperatures.ADVANCED ENGINEERING MATERIALS,20(2),-.
MLA	Wang, M,et al."Tensile Strength Evolution and Damage Mechanisms of Al-Si Piston Alloy at Different Temperatures".ADVANCED ENGINEERING MATERIALS 20.2(2018):-.