陈志永

教授 博士生导师 硕士生导师

入职时间:1999-08-01

所在单位:材料科学与工程学院

学历:博士研究生毕业

办公地点:湖南省长沙市岳麓区中南大学校本部化学楼205#

性别:男

联系方式:czysh@netease.com

学位:博士学位

在职信息:在职

毕业院校:中南大学

   
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Dislocation arrays, precipitate bands and free zones in forged Mg-Gd-Y-Zr alloy

发布时间:2021-10-21

点击次数:

DOI码:10.1016/j.msea.2019.13878

发表刊物:Materials Science and Engineering A

关键字:Mg-Gd-Y-Zr alloy; Dislocation array; Precipitate band; PFZ; Mechanical property

摘要:Dislocation arrays are extensively generated in the hammer forged and then annealed Mg-8.3 Gd-2.6 Y-0.4 Zr (wt. %) alloy. Microscopy characterizations reveal a high thermal stability of these dislocation arrays. During ageing treatment, dislocation arrays act as preferred sites for precipitation of β' phase, promoting the formation of the bamboo-like precipitate bands, and resulting in a depletion of solutes nearby and the formation of precipitate free zones (PFZs) along these bands. The forged samples after annealing and then ageing at an optimized temperature of 265 °C for different periods exhibit a similar strength and strain hardening but an increased elongation with ageing time, suggesting that the precipitate bands act as strong barriers for the motion of dislocations and twins while PFZs can effectively enhance deformability of Mg-Gd-Y-Zr alloy.

合写作者:B. Tang, C. You, Y.C. Wan*, Y.H. Gao, Z.Y. Chen, L.W. Lu, C,M. Liu, J. Wang

第一作者:B.Z. Wang

文献类型:J

卷号:775

页面范围:138789

ISSN号:0921-5093

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发表时间:2019-12-09

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