Microstructure evolution of Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy during deformation and its effect on strengthening

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:657

Article

Yu, Zijian¹  Huang, Yuanding²  Gan, Weimin²  Mendis, Chamini Lakshi²  Zhong, Zhengye³  Brokmeier, Heinz Guenter^2,3  Hort, Norbert²  Meng, Jian¹ 

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Peoples R China

[2] Helmholtz Zentrum Geesthacht, Inst Mat Res, D-21502 Geesthacht, Germany

[3] Tech Univ Clausthal, Inst Mat Sci & Engn, D-38678 Clausthal Zellerfeld, Germany

关键词: Magnesium alloy;    Texture;    Synchrotron radiation;    Mechanical property;   

DOI  :  10.1016/j.msea.2016.01.071

来源: Elsevier

【 摘 要 】

Microstructure and texture evolutions during tensile and compression deformation of an as-extruded Mg-11Gd-4.5Y-1Nd-1.5Zn-0.5Zr (wt%) alloy have been investigated using in-situ synchrotron radiation diffraction and subsequent microscopy. The alloy consists of < 10 (1) over bar0 > fiber texture, {11 (2) over bar0}[0001] and {11 (2) over bar0}< 10 (1) over bar0 > texture components prior to deformation. The texture evolves from [0001] to (10 (1) over bar0) in tension, but from < 10 (1) over bar0 > to [0001] in compression. The evolution of texture is attributed to the activity of the tensile twinning and non-basal < a > type slip. The tendency of texture evolution depends on the favorable texture component for the activation of above deformation modes. The grain refinement, Mg-5(Gd, Y, Nd) and LPSO phases, and the texture contribute to the improvement in strength. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free