Deformation mechanisms of basal slip, twinning and non-basal slips in Mg-Y alloy by micropillar compression

doi:10.1016/j.msea.2021.141408

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	Deformation mechanisms of basal slip, twinning and non-basal slips in Mg-Y alloy by micropillar compression
	Li N(李娜)1,2; Yang, Lingwei 3; Wang, Chuanyun 4; Monclus, M. A.2; Shi, Dongfeng 2,5; Molina-Aldareguia, J. M.2
通讯作者	Yang, Lingwei(lingwei.yang@cardc.cn) ; Molina-Aldareguia, J. M.(jon.molina@imdea.org)
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2021-07-05
卷号	819 页码:9
ISSN	0921-5093
摘要	Micropillar compression technique was employed to study the microscale deformation mechanisms of basal slip, twinning and non-basal slips at selected grains in a Mg-2 wt.% Y alloy. The results suggest a critical resolved shear stress (tCRSS) for basal slip 12.5 +/- 1.7 MPa, and for twin nucleation and twin growth 38.5 +/- 1.2 MPa and 33.8 +/- 0.7 MPa, respectively. The higher values compared to those in pure Mg suggests a more balanced deformation in Mg alloy with Y addition. The activation of dislocations in the twinned orientation is highlighted, which leads to strong work hardening in twinned favorable orientation [1010]. In addition, at prismatic-slip favorable orientation [1120], a twinning-to-prismatic slip transition was observed when elevating temperature from 25 degrees C to 100 degrees C and 250 degrees C. Specially at 250 degrees C, twinning was completely prohibited, and pure prismatic slip was triggered. The measured tCRSS for prismatic slip at 250 degrees C was 39.7 +/- 0.3 MPa, much higher than that for pure Mg at the same temperature. Finally, at pyramidal-slip favorable orientation [0001], an abnormal strengthening was observed at 100 degrees C and 250 degrees C due to activation of pyramidal slips. Decompositions of dislocations and Y segregation at stacking faults are the main mechanisms leading to the hightemperature strengthening in Mg-Y alloy.
关键词	Magnesium alloy Mechanical property Micropillar compression Deformation mechanisms
DOI	10.1016/j.msea.2021.141408
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000668733000002
关键词[WOS]	MAGNESIUM SINGLE-CRYSTALS ; RESOLVED SHEAR-STRESS ; C PLUS ; TEMPERATURE ; SIZE ; AL ; NUCLEATION ; BEHAVIOR ; GROWTH ; FAULT
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
资助项目	Madrid Region[S2013/MIT2775] ; DIMMAT project (Spain) ; China Scholarship Council[201506020081] ; China Scholarship Council[201406290011] ; China Scholarship Council[201706050154]
项目资助者	Madrid Region ; DIMMAT project (Spain) ; China Scholarship Council
论文分区	一类
力学所作者排名	1
RpAuthor	Yang, Lingwei ; Molina-Aldareguia, J. M.
引用统计	被引频次：28[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/87044
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 2.IMDEA Mat Inst, C Eric Kandel 2, Madrid 28906, Spain; 3.China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China; 4.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China; 5.Univ Politecn Madrid, Dept Mat Sci, Polytech Univ Madrid, ETS Ingn Caminos, Madrid 28040, Spain
推荐引用方式 GB/T 7714	Li N,Yang, Lingwei,Wang, Chuanyun,et al. Deformation mechanisms of basal slip, twinning and non-basal slips in Mg-Y alloy by micropillar compression[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,819:9.
APA	李娜,Yang, Lingwei,Wang, Chuanyun,Monclus, M. A.,Shi, Dongfeng,&Molina-Aldareguia, J. M..(2021).Deformation mechanisms of basal slip, twinning and non-basal slips in Mg-Y alloy by micropillar compression.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,819,9.
MLA	李娜,et al."Deformation mechanisms of basal slip, twinning and non-basal slips in Mg-Y alloy by micropillar compression".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 819(2021):9.

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