Deformation mechanisms of Al0.1CoCrFeNi at elevated temperatures

doi:10.1016/j.msea.2016.12.110

CORC > 北京大学 > 工学院

	Deformation mechanisms of Al0.1CoCrFeNi at elevated temperatures
	Yang, Tengfei ; Tang, Zhi ; Xie, Xie ; Carroll, Robert ; Wang, Gongyao ; Wang, Yugang ; Dahmen, Karin A. ; Liaw, Peter K. ; Zhang, Yanwen
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2017
关键词	High-entropy alloy Transmission electron microscopy Mechanical properties Microstructure HIGH-ENTROPY ALLOYS INDUCED PLASTICITY STEEL SUZUKI SEGREGATION WEAR-RESISTANCE MICROSTRUCTURE BEHAVIOR DESIGN DEPENDENCE STRENGTH ALUMINUM
DOI	10.1016/j.msea.2016.12.110
英文摘要	Deformation mechanisms of a high-entropy alloy with a single face-centered-cubic phase, Al0.3CoCrFeNi, at elevated temperatures are studied to explore the high temperature performances of high-entropy alloys. Tensile tests at a strain rate of 10(-4) s(-1) are performed at different temperatures ranging from 25 to 700 degrees C. While both yield strength and ultimate tensile strength decrease with increasing temperature, the maximum elongation to fracture occurred at 500 degrees C. Transmission electron microscopy characterizations reveal that, at both 25 and 500 degrees C, most of deformation occurs by dislocation glide on the normal face-centered-cubic slip system, {111} (110). In contrast, numerous stacking faults are observed at 600 and 700 degrees C, accompanied by the decreasing of dislocation density, which are attributed to the motion of Shockley partials and the dissociation of dislocations, respectively. According to the Considere's criterion, it is assumed that the dissociation of dislocations and movement of Shockley partials at higher temperatures significantly decreases the work hardening during tensile tests, promoting the early onset of necking instability and decreasing the high-temperature ductility.; US National Science Foundation [DMR-0909037, CMMI-0900271, CMMI-1100080]; Department of Energy (DOE). Office of Nuclear Energy's Nuclear Energy University Program (NEUP) [00119262]; DOE, Office of Fossil Energy, National Energy Technology Laboratory [DE-FE-0008855, DE-FE-0011194]; National Magnetic Confinement Fusion Energy Research Project [2015GB113000]; China Postdoctoral Science Foundation [2015M570014]; National Natural Science Foundation of China [11335003, 91226202]; SCI(E); ARTICLE; 552-558; 684
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/475581]
专题	工学院
推荐引用方式 GB/T 7714	Yang, Tengfei,Tang, Zhi,Xie, Xie,et al. Deformation mechanisms of Al0.1CoCrFeNi at elevated temperatures[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017.
APA	Yang, Tengfei.,Tang, Zhi.,Xie, Xie.,Carroll, Robert.,Wang, Gongyao.,...&Zhang, Yanwen.(2017).Deformation mechanisms of Al0.1CoCrFeNi at elevated temperatures.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING.
MLA	Yang, Tengfei,et al."Deformation mechanisms of Al0.1CoCrFeNi at elevated temperatures".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2017).