| 热处理对Mg-6Al-1Nd-1Gd合金组织和蠕变行为的影响 |
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| 引用本文： | 王武孝,秦子禾,刘董超,雷晨,刘健.热处理对Mg-6Al-1Nd-1Gd合金组织和蠕变行为的影响[J].材料热处理学报,2021,42(3):30-35. |
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| 作者姓名： | 王武孝 秦子禾 刘董超 雷晨 刘健 |
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| 作者单位： | 西安理工大学材料科学与工程学院,陕西西安 710048 |
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| 基金项目： | 国家自然科学基金(51771146);陕西省自然科学基础研究计划项目(2019JM-180)。 |
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| 摘 要： | 采用光学显微镜(OM)、扫描电镜(SEM)、EDS能谱分析等研究了 Mg-6Al-1Nd-1Gd合金固溶与时效处理后的显微组织及在200℃和70 MPa条件下的高温压缩蠕变行为.结果表明:固溶+时效处理后Mg-6Al-1Nd-1Gd合金的β-Mg17Al12相几乎完全消失,金属间化合物为Al2RE(Nd、Gd)相,且在...
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| 关 键 词： | Mg-6Al-1Nd-1Gd合金 热处理 金属间化合物 高温蠕变 |
Effect of heat treatment on microstructure and creep behavior of Mg-6Al-1Nd-1Gd alloy |
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| WANG Wu-xiao,QIN Zi-he,LIU Dong-chao,LEI Chen,LIU Jian.Effect of heat treatment on microstructure and creep behavior of Mg-6Al-1Nd-1Gd alloy[J].Transactions of Materials and Heat Treatment,2021,42(3):30-35. |
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| Authors: | WANG Wu-xiao QIN Zi-he LIU Dong-chao LEI Chen LIU Jian |
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| Affiliation: | (School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China) |
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| Abstract: | Microstructure of Mg-6 Al-1 Nd-1 Gd alloys after solid solution and aging treatment and its high temperature compression creep behavior under 200℃and 70 MPa conditions were investigated by means of optical microscope(OM),scanning electron microscopy(SEM)and energy-dispersive spectroscopy(EDS)analysis.The results show that theβ-Mg17Al12 phase of the Mg-6 Al-1 Nd-1 Gd alloy almost disappears after T6 heat-treatment,and the phase of the intermetallic compound is Al2RE(Nd,Gd),which segregates in the grain boundary.After creep,the volume fraction of the intermetallic compounds of the alloy after heat treatment increases,and it is found that the increment of the volume fraction of the intermetallic compounds of the alloy after T4 heat treatment is the most,the high temperature creep resistance is the best,and the creep strain and steady-state creep rates are 1.8%and 2.333×10-8 s-1,respectively,which decrease by 59.6%and 59.9%compared with the as-cast alloy,respectively. |
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| Keywords: | Mg-6Al-1Nd-1Gd alloy heat treatment intermetallic compound high-temperature creep |
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