| AZ31B镁合金热压缩变形的组织变化与变形机制 |
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| 引用本文： | 陈拂晓,郭俊卿,孙付涛. AZ31B镁合金热压缩变形的组织变化与变形机制[J]. 塑性工程学报, 2012, 19(1): 87-91 |
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| 作者姓名： | 陈拂晓 郭俊卿 孙付涛 |
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| 作者单位： | 河南科技大学材料科学与工程学院,洛阳,471003 |
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| 基金项目： | 河南省科技攻关资助项目(072102230007);河南省科技基础前沿资助项目(112300413227) |
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| 摘 要： | 对铸态AZ31B镁合金在温度280℃～440℃、应变速率0.001s-1～0.1s-1条件下进行热压缩实验,分析变形程度、应变速率和加热温度对其微观组织变化的影响,探讨合金的热压变形机制。实验结果表明,该合金热变形时发生了动态再结晶。变形温度越高、变形速率越小和变形量越大时,动态再结晶进行的越充分;变形温度越低、变形速率越大和变形量越大时,动态再结晶晶粒越细小。该合金的热变形机制是滑移孪晶联合机制。
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| 关 键 词： | AZ31B镁合金 热压缩 微观组织 变形机制 |
Microstructure transformation and deformation mechanism of AZ31B at hot compression |
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| CHEN Fu-xiao , GUO Jun-qing , SUN Fu-tao. Microstructure transformation and deformation mechanism of AZ31B at hot compression[J]. Journal of Plasticity Engineering, 2012, 19(1): 87-91 |
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| Authors: | CHEN Fu-xiao GUO Jun-qing SUN Fu-tao |
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| Affiliation: | (School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003 China) |
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| Abstract: | Hot compression tests of AZ31B magnesium alloy were performed at deformation temperature 280℃ to 440℃ and strain rate 0.001s-1 to 0.1s-1.The influence of deformation,strain rate and deformation temperature on the microstructure transformation and deformation mechanism of the alloy at hot compression was analyzed.The results show that dynamic recrystallization(DRX) would take place in the hot deformation.DRX would be more complete with higher deformation temperature,smaller strain rate and bigger deformation.With decrease of temperature,increases of strain rate and deformation degree,the grain size of DRX would be smaller.The hot deformation mechanism of the alloy is the joint mechanism of slip and twinning. |
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| Keywords: | AZ31B magnesium alloy hot compression microstructure deformation mechanism |
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