Grain elongation in a superplastic 7075 Al alloy

被引：16
|
作者：
Shin, DH [1 ]
Joo, YJ
Lee, CS
Park, KT
机构：
[1] Hanyang Univ, Dept Met & Mat Sci, Ansan 425791, Kyunggi Do, South Korea
[2] KIST, Div Met, Seoul 130650, South Korea
[3] Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Pohang 790784, South Korea
[4] Taejon Natl Univ Technol, Dept Adv Mat Sci & Engn, Taejon 300717, South Korea
来源：
SCRIPTA MATERIALIA | 1999年 / 41卷 / 03期
关键词：
D O I：
10.1016/S1359-6462(99)00160-8
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Microstructural evolution during superplastic deformation of a fine grained 7475 Al alloy is manifested by considerable grain elongation along the stress and the formation of dispersoid free zone in the grain boundaries perpendicular to the stress axis. Microstructural examinations, together with tensile tests and strain rate sensitivity measurements reveal that such microstructural evolution is associated with diffusional processes. In addition, it is suggested that grain elongation is mainly attributed to the cooperative process of the formation of dispersoid free zone due to diffusional processes and locally enhanced plastic deformation at relatively soft dispersoid free zone.
引用
收藏
页码：269 / 274
页数：6
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