Achieving high strength above 400 MPa in conventionally extruded Mg-Ca-Zn ternary alloys

doi:10.1007/s11431-021-1911-3

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	Achieving high strength above 400 MPa in conventionally extruded Mg-Ca-Zn ternary alloys
	Du Sen 1; Yang Kun 1; Li Man 1; Li Jingren 1; Ren Yuping 1; Huang Qiuyan 2; Pan Hucheng 1; Qin Gaowu 1
刊名	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
	2022-01-17
页码	10
关键词	wrought Mg alloy dynamic recrystallization mechanical property co-segregation
ISSN号	1674-7321
DOI	10.1007/s11431-021-1911-3
通讯作者	Pan Hucheng(panhc@atm.neu.edu.cn)
英文摘要	In this work, the role of Zn content in modifying the microstructure and mechanical properties of the Mg-1.2Ca-xZn (x=0.6, 2.0 wt.%, named as XZ10-0 and ZX21-0, respectively) based alloys was studied, and it is found that the yield strength (YS) of the present Mg-(Zn)-Ca based alloys increases monotonically with increasing the Zn concentration, from similar to 339 MPa in low-Zn content XZ10-0 sample to similar to 406 MPa in high-Zn content ZX21-0 sample. Microstructure characterization shows that the enhanced YS can be attributed to the grain refinement, fine and dispersed nano-phases, a large number of lamellae structures, and the decrease of recrystallization fraction. TEM results show that the formation mechanism for the ultra-fine grains in present Mg-(Zn)-Ca based alloys can be attributed to the co-segregation of Ca and Zn elements at the grain boundary, as well as the dynamic nanoprecipitations. When the Zn content is high, the nano-phases in ZX21-0 sample belong to the Ca2Mg6Zn3 ternary phases, which exert much higher thermal stability than the nano-sized Mg2Ca binary phases formed in the low-Zn content XZ10-0 sample. The finer size and higher number density of the nano-MgZnCa phases lead to the much finer grain size and sub-grain lamellae thickness in ZX21-0 sample, which thus results in the higher YS of similar to 406 MPa.
资助项目	National Natural Science Foundation of China[51701211] ; National Natural Science Foundation of China[51971053] ; Project of Promoting Talents in Liaoning Province[XLYC1808038] ; Young Elite Scientists Sponsorship Program by CAST[2019-2021QNRC001] ; Young Elite Scientists Sponsorship Program by CAST[20192021QNRC002] ; Fundamental Research Funds for the Central Universities[N2002011] ; Joint Research Fund LiaoningShenyang National Laboratory for Materials Science[2019JH3/30100040]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000746311700002
资助机构	National Natural Science Foundation of China ; Project of Promoting Talents in Liaoning Province ; Young Elite Scientists Sponsorship Program by CAST ; Fundamental Research Funds for the Central Universities ; Joint Research Fund LiaoningShenyang National Laboratory for Materials Science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173694]
专题	金属研究所_中国科学院金属研究所
通讯作者	Pan Hucheng
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Du Sen,Yang Kun,Li Man,et al. Achieving high strength above 400 MPa in conventionally extruded Mg-Ca-Zn ternary alloys[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2022:10.
APA	Du Sen.,Yang Kun.,Li Man.,Li Jingren.,Ren Yuping.,...&Qin Gaowu.(2022).Achieving high strength above 400 MPa in conventionally extruded Mg-Ca-Zn ternary alloys.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,10.
MLA	Du Sen,et al."Achieving high strength above 400 MPa in conventionally extruded Mg-Ca-Zn ternary alloys".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2022):10.