Characterization of a novel 14H-LPSO structure and related elevated-temperature mechanical behaviors in an extruded Mg-Y-Zn-Cu alloy

doi:10.1016/j.msea.2019.138786

CORC > 金属研究所 > 中国科学院金属研究所

	Characterization of a novel 14H-LPSO structure and related elevated-temperature mechanical behaviors in an extruded Mg-Y-Zn-Cu alloy
	Shi, B. Q.1; Zhao, L. Y.1; Chen, D. C.1; Li, C. Q.3; Dong, Y.3; Wu, D.2; Chen, R. S.2; Ke, W.2
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2020-01-20
卷号	772 页码:12
关键词	Magnesium alloy Long-period structure 14H Serrated flow superplasticity
ISSN号	0921-5093
DOI	10.1016/j.msea.2019.138786
通讯作者	Li, C. Q.(chuanqiang.li@gdut.edu.cn) ; Chen, R. S.(rschen@imr.ac.cn)
英文摘要	A Mg-2.1Y-0.5Zn-0.6Cu-0.1Zr (WZC200, in at. %) alloy was developed and conducted to extrusion process to refine the grains as well as LPSO structure, aiming to investigate the mechanical behaviors at ambient and elevated temperatures and their relations with microstructures. A 14H-LPSO structure with stacking sequence of ABCBCACACACBCBA, consisting of twin-related building blocks with a novel CBCA-type, was revealed in the solution-treated WZC200 alloy. Fully recrystallized microstructure with grain size of similar to 14 mu m, refined LPSO structure and weaken texture were obtained through extrusion process. The tension results tested at ambient and elevated temperatures revealed ultimate tensile strength (UTS) of 317 MPa along with excellent elongation-to-failure of 26.5% at RT, moderate UTS above 275 MPa with occurrence of serrated flow In the tensile curves in the range 150-200 degrees C, and obviously declined UTS (similar to 150 MPa) along with superplastisity of 155% at 300 degrees C. The observed serrated flow in the range 150-200 degrees C was mainly attributed to the dynamic strain ageing. The dramatic drop in UTS at 300 degrees C was ascribed to fragmenting of LPSO phases and probably significant activation of non-basal slips, these two factors help to coordinate deformation between LPSO and the matrix and restrain the cavity nucleation, resultantly contributing to the observed superplasticity at this temperature.
资助项目	National Natural Science Foundation of China[51601193] ; National Natural Science Foundation of China[512050650] ; National Natural Science Foundation of China[51801029] ; National Natural Science Foundation of China[51901047] ; startup project for high-level talents of Foshan University[CGG07244] ; key Project of Department of Education of Guangdong Province[2016GCZX008] ; Project of Engineering Research Center of Foshan[20172010018] ; State Key Program of National Natural Science of China[51531002] ; National Key Research and Development Program of China[2016YFB0301104]
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:000509621500033
资助机构	National Natural Science Foundation of China ; startup project for high-level talents of Foshan University ; key Project of Department of Education of Guangdong Province ; Project of Engineering Research Center of Foshan ; State Key Program of National Natural Science of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/137160]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, C. Q.; Chen, R. S.
作者单位	1.Foshan Univ, Sch Mat & Energy, Foshan 528000, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, Shenyang 110016, Peoples R China 3.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China
推荐引用方式 GB/T 7714	Shi, B. Q.,Zhao, L. Y.,Chen, D. C.,et al. Characterization of a novel 14H-LPSO structure and related elevated-temperature mechanical behaviors in an extruded Mg-Y-Zn-Cu alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,772:12.
APA	Shi, B. Q..,Zhao, L. Y..,Chen, D. C..,Li, C. Q..,Dong, Y..,...&Ke, W..(2020).Characterization of a novel 14H-LPSO structure and related elevated-temperature mechanical behaviors in an extruded Mg-Y-Zn-Cu alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,772,12.
MLA	Shi, B. Q.,et al."Characterization of a novel 14H-LPSO structure and related elevated-temperature mechanical behaviors in an extruded Mg-Y-Zn-Cu alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 772(2020):12.