| 挤压AZ31B镁合金板材中温轧制变形中的组织变化 |
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| 引用本文： | 魏松波,蔡庆伍,唐荻,毛燕,黄蓓蓓.挤压AZ31B镁合金板材中温轧制变形中的组织变化[J].塑性工程学报,2008,15(6). |
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| 作者姓名： | 魏松波 蔡庆伍 唐荻 毛燕 黄蓓蓓 |
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| 作者单位： | 北京科技大学,高效轧制国家工程研究中心,北京,100083 |
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| 基金项目： | 国家科技支撑计划重点项目 |
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| 摘 要： | 在220℃的温度条件下,对AZ31B挤压板材进行单道次轧制变形,通过光学显微镜(OM)和扫描电镜(SEM)观察了中温变形AZ31B微观组织演变。结果表明,在中温变形的初始阶段,孪生为主要的变形机制,随变形量的增加,变形畸变能的积聚以及孪晶间的相互作用,导致了动态再结晶的形核与长大,在大的变形量条件下,孪生、形变带和动态再结晶共同作用,使变形得以进行。
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| 关 键 词： | AZ31B镁合金 温变形 微观组织 孪生 动态再结晶 |
Microstructure evolution in warm rolling of extrude AZ31B magnesium alloy plates |
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| WEI Song-bo,CAI Qing-wu,TANG Di,MAO Yan,HUANG Bei-bei.Microstructure evolution in warm rolling of extrude AZ31B magnesium alloy plates[J].Journal of Plasticity Engineering,2008,15(6). |
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| Authors: | WEI Song-bo CAI Qing-wu TANG Di MAO Yan HUANG Bei-bei |
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| Abstract: | The as-extruded AZ31B Mg alloy plates are warm-rolled under different reduction of single pass rolling at 220℃.The microstructure evolution during the warm deformation is observed by optical microscopy(OM) and scanning electronic microscopy(SEM).Twinning is the primary deformation mechanism at the initial stage of warm deformation.The distortion energy stored by twinning and reaction between twins during deformation are responsible for the nucleation and growth of dynamic recrystallization(DRX).The combined action of twinning,DRX,and deformation bands result in the large stain deformation in warm-rolling. |
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| Keywords: | AZ31B Mg alloy warm deformation microstructure twinning dynamic recrystallization |
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