| 挤压态Mg-3Al-0.8Sr室温压缩过程中的变形行为研究 |
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| 引用本文： | 李俊辰,彭晓东,郑笑芳,谢苏云.挤压态Mg-3Al-0.8Sr室温压缩过程中的变形行为研究[J].兵器材料科学与工程,2011,34(6):26-29. |
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| 作者姓名： | 李俊辰 彭晓东 郑笑芳 谢苏云 |
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| 作者单位： | 重庆大学材料科学与工程学院,重庆,400045;重庆大学材料科学与工程学院,重庆400045;国家镁合金材料工程技术研究中心,重庆400044 |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2007CB613702); 科技部国际合作项目(2010DFR50010) |
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| 摘 要： | 在新三思拉伸实验机CMT-5150上对挤压态Mg-3Al-0.8Sr进行室温压缩实验,研究不同应变量下的组织演变过程,并对压缩时的应力-应变曲线和断口形貌进行分析。结果表明:Sr的加入可以推迟孪生的发生,当应变量超过3.5%时,随着应变量的增加{101-2}拉伸孪晶的数量不断增加;挤压态Mg-3Al-0.8Sr室温压缩时的应力-应变曲线可分为4个阶段并分别对应不同的变形机制。在实验合金的断口形貌图中观察到大量的解理台阶和少量的韧窝,表明实验合金的断裂机制以脆断为主,塑性断裂为辅。
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| 关 键 词： | 镁合金 室温压缩 组织演变 应力-应变曲线 断口形貌 |
Deformation behavior of the extruded Mg-3Al-0.8Sr compressed at room temperature |
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| LI Junchen,PENG Xiaodong,ZHENG Xiaofang,XIE Suyun.Deformation behavior of the extruded Mg-3Al-0.8Sr compressed at room temperature[J].Ordnance Material Science and Engineering,2011,34(6):26-29. |
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| Authors: | LI Junchen PENG Xiaodong ZHENG Xiaofang XIE Suyun |
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| Affiliation: | LI Junchen1,2,PENG Xiaodong1,ZHENG Xiaofang1,XIE Suyun1,2(1.College of Material Science and Engineering,Chongqing University,Chongqing 400045,China,2.National Engineering Research Center for Magnesium Alloys,Chongqing 400044,China) |
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| Abstract: | Ambient temperature compression test with CMT-5150 was performed on an extruded round bar of Mg-3Al-0.8Sr alloy.The microstructure evolution at different strain was investigated.The stress-strain curves and the fracture morphology of the extruded bar compressed at room temperature were also analyzed.The results show that the twinning behaviors are retarded by the addition of Sr.With the increase of compressing strains,the density of twins increases when strain surpasses 3.5%.The stress-strain curves of the ... |
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| Keywords: | magnesium alloy ambient compression microstructure evolution stress-strain curves fracture morphology |
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