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| 往复挤压Mg-Al-Si合金的高温拉伸性能 | |
| 引用本文： | 郭学锋,杨文朋,宋佩维.往复挤压Mg-Al-Si合金的高温拉伸性能[J].材料热处理学报,2012,33(2):7-11. |
| 作者姓名： | 郭学锋 杨文朋 宋佩维 |
| 作者单位： | 1. 河南理工大学材料科学与工程学院,河南焦作,454010 2. 河南理工大学材料科学与工程学院,河南焦作454010／西安理工大学材料科学与工程学院,陕西西安710048 3. 西安理工大学材料科学与工程学院,陕西西安,710048 |
| 基金项目： | 国家自然科学基金，教育部博士点基金，河南省科技攻关资助项目，河南省教育厅自然科学基金资助项目 |
| 摘 要： | 利用往复挤压(RE-n,n为挤压道次)制备Mg-4Al-2Si(AS42)、Mg-4Al-4Si(AS44)和Mg-6Al-6Si(AS66)合金,并在150℃和1.33×10-3s-1的初始应变速率下测试合金的拉伸性能。结果表明:RE-8-AS42合金晶粒尺寸为2.1μm,Mg2Si颗粒尺寸为1.3μm;RE-4-AS42合金晶粒尺寸为4.8μm,组织中含有2～20μm的大块Mg2Si颗粒;RE-AS44和RE-AS66合金晶粒尺寸约为11μm,组织中存在>20μm的Mg2Si颗粒。合金拉伸强度随挤压道次增加而提高,RE-8-AS42合金性能最佳,抗拉强度、屈服强度和伸长率分别为250 MPa、197 MPa和62%,高的性能归因于细小的晶粒和阻碍晶界滑移的细小稳定Mg2Si颗粒。 |
| 关 键 词： | Mg-Al-Si合金 往复挤压 高温拉伸性能 |
Elevated temperature tensile properties of Mg-Al-Si alloys prepared by reciprocating extrusion |
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| GUO Xue-feng,YANG Wen-peng,SONG Pei-wei.Elevated temperature tensile properties of Mg-Al-Si alloys prepared by reciprocating extrusion[J].Transactions of Materials and Heat Treatment,2012,33(2):7-11. | |
| Authors: | GUO Xue-feng YANG Wen-peng SONG Pei-wei |
| Affiliation: | 1.School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454010,China; 2.School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China) |
| Abstract: | Mg-4Al-2Si(AS42),Mg-4Al-4Si(AS44) and Mg-6Al-6Si(AS66) alloys were prepared by reciprocating extrusion(RE-n,where n is pass number),and tensile properties of the alloys were examined at 150 ℃ with an initial strain rate of 1.33 × 10-3 s-1.The results show that the grain size of RE-8-AS42 alloy with Mg2Si particles of 1.3 μm is 2.1 μm,the grain size of 4.8 μm is observed in RE-4-AS42 alloy containing Mg2Si particles of 2-20 μm,and the grain sizes of RE-AS44 and RE-AS66 alloys are about 11 μm containing Mg2Si particles larger than 20 μm.The tensile strength increases with increasing extrusion passes.The RE-8-AS42 alloy has the best tensile properties with an ultimate tensile strength,a yield strength and an elongation of 250 MPa,197 MPa and 62%,respectively.The excellent properties are attributed to the fine grains and thermally stable fine Mg2Si particles,which can suppress grain boundaries sliding effectively. |
| Keywords: | Mg-Al-Si alloy reciprocating extrusion elevated temperature tensile property |
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