Effect of microalloyed Zr on the extruded microstructure of Mg-6.2Zn-based alloys

SCRIPTA MATERIALIA

卷:90-91

Article

Bhattacharjee, T.^1,2  Nakata, T.³  Sasaki, T. T.²  Kamado, S.³  Hono, K.^1,2 

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058577, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[3] Nagaoka Univ Technol, Nagaoka, Niigata 9402188, Japan

关键词: Mg-Zn alloy;    ZK60;    Precipitation;    Transmission electron microscopy;   

DOI  :  10.1016/j.scriptamat.2014.07.011

来源: Elsevier

【 摘 要 】

The addition of a small amount of Zr to a Mg-6.2Zn (Z6) binary alloy causes a substantial increase in the tensile yield strength of the extruded form of this alloy. This is attributed to the formation of thermally stable fine Mg(Zn,Zr) precipitates, which refine the extruded microstructure. A fine dispersion of beta'(1) and beta'(2) precipitates within the refined grains after T6 aging at 160 degrees C results in a high tensile yield strength of 275 MPa, and an ultimate tensile strength of 318 MPa with an elongation to failure of 17.1%. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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