The effect of erbium on the microstructure and mechanical properties of Al-Mg-Mn-Zr alloy
The effect of erbium on the microstructure and mechanical properties of Al-Mg-Mn-Zr alloy
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DOI：
10.1016/j.msea.2009.02.045
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发表时间：
2009-08-15
期刊：
影响因子：
6.4
通讯作者：
Nie, Z. R.
中科院分区：
文献类型：
--
作者：
Wen, S. P.;Xing, Z. B.;Nie, Z. R.
研究了Er对Al-Mg-Mn-Zr合金显微组织和力学性能的影响。已经发现，约0.2wt.%的聚乙烯醇可以用于制备聚乙烯醇。Er固溶于基体中，多余的Er原子在晶界偏聚，形成初生Al 3Er。添加0.4重量% Er由于形成初生Al 3Er而细化铸态合金的晶粒尺寸。在470 ℃的均匀化过程中，固溶体分解形成二次Al 3Er的分散体，其小面平行于{100}和{110}面。二次析出的Al 3Er提高了合金的强度，尤其是高温强度。在150 ℃下，具有0.2wt% Er的合金的屈服强度比不含Er的合金的屈服强度高50%。添加0.4wt. Er比不添加Er的合金的温度高约25 ℃。(C)2009 Elsevier B. V.保留所有权利。
The influences of erbium (Er) on the microstructure and mechanical properties of Al-Mg-Mn-Zr alloys have been investigated. It has been found that about 0.2 wt.% Er can be dissolved in the matrix, excess Er atoms segregate at grain boundaries to form primary Al3Er. Addition of 0.4 wt.% Er refines the grain size of the as-cast alloy due to the formation of primary Al3Er. The solid solution decomposes to form a dispersion of secondary Al3Er, with facets parallel to {100} and {110} planes, during homogenization at 470 degrees C. The secondary Al3Er precipitates improve strength, especially the elevated temperature strength. The yield strength, at 150 degrees C, of the alloy with 0.2 wt% Er is 50% higher than that of the Er-free alloy. The recrystallization temperature of the alloy with 0.4 wt.% Er is about 25 degrees C higher than that of the alloy without addition of Er. (C) 2009 Elsevier B.V. All rights reserved.