材料科学
动态再结晶
打滑(空气动力学)
晶体孪晶
镁合金
攀登
再结晶(地质)
冶金
合金
大气温度范围
粒度
变形机理
蠕动
位错
复合材料
热加工
微观结构
热力学
地质学
古生物学
物理
作者
Arthur Galiyev,Rustam Kaibyshev,Günter Gottstein
出处
期刊:Acta Materialia
[Elsevier]
日期:2001-04-01
卷期号:49 (7): 1199-1207
被引量:1053
标识
DOI:10.1016/s1359-6454(01)00020-9
摘要
The mechanisms of plastic deformation and dynamic recrystallization (DRX) in a Mg–5.8% Zn–0.65% Zr alloy were studied by compression tests at temperatures between 423 and 723 K and at strain rates ranging from 10−5 to 10−1 s−1. It was shown that the mechanisms of DRX depended on the operating deformation mechanisms which changed with temperature. Low-temperature DRX (LTDRX below 473 K) was associated with the operation of twinning, basal slip and (a+c) dislocation glide. In the intermediate temperature range (473–523 K) continuous DRX (CDRX) was observed and associated with extensive cross-slip due to the Friedel–Escaig mechanism. At temperatures ranging from 573 to 723 K both bulging of original grain boundaries and subgrain growth were the operating DRX mechanisms and controlled by dislocation climb.
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