| Sr对挤压态AZ31微观组织及力学性能的影响 |
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| 引用本文： | 谢卫东,党春梅,宁旭,李兆楠.Sr对挤压态AZ31微观组织及力学性能的影响[J].兵器材料科学与工程,2011,34(6):44-47. |
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| 作者姓名： | 谢卫东 党春梅 宁旭 李兆楠 |
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| 作者单位： | 重庆大学材料科学与工程学院,重庆400030;重庆大学国家镁合金材料工程技术研究中心,重庆400030;重庆大学材料科学与工程学院,重庆,400030 |
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| 基金项目： | 重庆市科技计划项目(CSTC,2009AC4059;CSTC,2008BB4323); 重庆大学研究生科技创新基金(CDJXS10130007) |
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| 摘 要： | 制备不同Sr含量的挤压态AZ31-xSr(x=0,0.4%,0.8%,1.2%)合金试样,采用光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、材料试验机等观察、测试合金的微观组织和力学性能。结果表明:未添加Sr的AZ31镁合金挤压变形后有相当部分的晶粒呈长条状分布而未发生动态再结晶,晶粒尺寸较大;添加少量的Sr可细化挤压态AZ31合金的组织。随着Sr含量的增加,室温和高温力学性能呈先升后降趋势,最高点在Sr的质量分数为0.8%;与无Sr的AZ31合金相比,室温和150℃时的抗拉强度提高约11.5%,15.7%,屈服强度提高约14.9%,40.2%。
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| 关 键 词： | 锶 AZ31 镁合金 动态再结晶 |
Influence of Sr addition on the microstructure and mechanical properties of extruded AZ31 |
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| XIE Weidong,DANG Chunmei,NING Xu,LI Zhaonan.Influence of Sr addition on the microstructure and mechanical properties of extruded AZ31[J].Ordnance Material Science and Engineering,2011,34(6):44-47. |
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| Authors: | XIE Weidong DANG Chunmei NING Xu LI Zhaonan |
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| Affiliation: | XIE Weidong1,2,DANG Chunmei1,NING Xu1,LI Zhaonan1(1.College of Materials Science and Engineering,Chongqing University,Chongqing 40030,China,2.National Engineering Research Center for Magnesium Alloys,Chongqing 400045,China) |
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| Abstract: | Extruded AZ31-xSr(x=0,0.4%,0.8%,1.2%) magnesium alloys were prepared.Microstructures and phases of as-cast and extruded specimens were observed and analyzed with metallographic microscope,SEM and XRD.Mechanical properties were tested by material testing machine.It is found that grains of extruded AZ31 alloy are long strip and dynamic recrystallization does not happen when Sr is not added.Adding a small amount of Sr,grains of extruded AZ31 alloy become fine and dynamic recrystallization happens.With the incr... |
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| Keywords: | Sr AZ31 magnesium alloys dynamic recrystallization |
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