| Effects of RE on microstructure and properties of AZ91 magnesium alloy |
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| 作者姓名： | 王渠东 吕宜振 曾小勤 丁文江 朱燕萍 |
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| 作者单位： | ，LU Yi zhen，ZENG Xiao qin，DING Wen jiang，ZHU Yan pingCollege of Materials Science and Engineering，Shanghai Jiao Tong University，Shanghai 200030，P.R.China |
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| 摘 要： | 1 ＩＮＴＲＯＤＵＣＴＩＯＮＭａｇｎｅｓｉｕｍａｌｌｏｙｓａｒｅｏｎｅｏｆｔｈｅｌｉｇｈｔｅｓｔｓｔｒｕｃ ｔｕｒａｌａｌｌｏｙｓ,ｗｈｉｃｈｈａｖｅｉｎｃｏｍｐａｒａｂｌｅｒａｔｉｏｏｆｓｔｒｅｎｇｔｈｔｏｍａｓｓ.Ｉｎｒｅｃｅｎｔｙｅａｒｓ,ｒｅｓｅａｒｃｈａｎｄｄｅｖｅｌ ｏｐｍｅｎｔｏｆｍａｇｎｅｓｉｕｍａｌｌｏｙｓｈａｖｅｂｅｅｎｇｒｅａｔｌｙ ｐｒｏ ｍｏｔｅｄｂｙｔｈｅｌｉｇｈｔｗｅｉｇｈｔｒｅｑｕｉｒｅｍｅｎｔｉｎａｕｔｏｍｏｂｉｌｅｉｎｄｕｓｔｒｙ .Ｈｏｗｅｖｅｒｔｈｅｉｒｃｏｍｍｅｒ…
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Effects of RE on microstructure and properties of AZ91 magnesium alloy |
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| WANG Qu-dong,LU Yi-zhen,ZENG Xiao-qin,DING Wen-jiang,ZHU Yan-ping.Effects of RE on microstructure and properties of AZ91 magnesium alloy[J].Transactions of Nonferrous Metals Society of China,2000,10(2). |
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| Authors: | WANG Qu-dong LU Yi-zhen ZENG Xiao-qin DING Wen-jiang ZHU Yan-ping |
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| Abstract: | AZ91 magnesium alloy was adopted as master alloy and rare earths (RE) of 1%, 2% and 3% additions wereadded, respectively. The influence of RE on the microstructure was investigated. By casting fluidity spiral specimens, effect of RE on fluidity was achieved. The microhardness of the alloys was tested. By casting specimens in permanent mold,tensile properties of the alloys with different RE addition at ambient and elevated temperatures were studied. The fracturemechanisms of the alloys were studied by SEM. RE additions cause the formation of Al11 RE3 precipitation besides phasechange in the alloys. RE firstly decreases and then increases the fluidity. RE has little influence on ambient temperaturetensile properties but greatly improves high temperature tensile properties at 150 C. Tensile failure of the alloys are mainly brittle cleavage and/or quasi-cleavage fracture |
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| Keywords: | rare earth alloys tensile property fractures |
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