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

文献类型：期刊论文

作者Li N(李娜)4,5; Yang, Lingwei3; Wang, Chuanyun2; Monclus, M. A.4; Shi, Dongfeng1,4; Molina-Aldareguia, J. M.4
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2021-07-05
卷号819页码:9
关键词Magnesium alloy Mechanical property Micropillar compression Deformation mechanisms
ISSN号0921-5093
DOI10.1016/j.msea.2021.141408
通讯作者Yang, Lingwei(lingwei.yang@cardc.cn) ; Molina-Aldareguia, J. M.(jon.molina@imdea.org)
英文摘要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.
分类号一类
WOS关键词MAGNESIUM SINGLE-CRYSTALS ; RESOLVED SHEAR-STRESS ; C PLUS ; TEMPERATURE ; SIZE ; AL ; NUCLEATION ; BEHAVIOR ; GROWTH ; FAULT
资助项目Madrid Region[S2013/MIT2775] ; DIMMAT project (Spain) ; China Scholarship Council[201506020081] ; China Scholarship Council[201406290011] ; China Scholarship Council[201706050154]
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000668733000002
资助机构Madrid Region ; DIMMAT project (Spain) ; China Scholarship Council
其他责任者Yang, Lingwei ; Molina-Aldareguia, J. M.
源URL[http://dspace.imech.ac.cn/handle/311007/87043]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Politecn Madrid, Dept Mat Sci, Polytech Univ Madrid, ETS Ingn Caminos, Madrid 28040, Spain
2.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China;
3.China Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China;
4.IMDEA Mat Inst, C Eric Kandel 2, Madrid 28906, Spain;
5.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China;
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.

入库方式： OAI收割

来源：力学研究所

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