Precipitation evolution in Al–Er–Zr alloys during aging at elevated temperature
Precipitation evolution in Al–Er–Zr alloys during aging at elevated temperature
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DOI：
10.1016/j.jallcom.2013.03.237
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发表时间：
2013-10
影响因子：
6.2
通讯作者：
S. Wen;K. Gao;Hui Huang;Wen Wang;Z. Nie
中科院分区：
文献类型：
--
作者：
S. Wen;K. Gao;Hui Huang;Wen Wang;Z. Nie
研究了Al-0.04Er-0.04Zr和Al-0.04Er-0.08Zr合金在450和500 °C高温时效过程中Al 3（ErZr）析出相随时间的演变。结果表明，两种合金中析出相的粗化行为相似，均为核壳结构，Zr偏聚在Al 3（ErZr）析出相的壳层中。随着Zr添加量的增加，Al-0.04Er-0.08Zr合金中析出相与基体的错配度减小，共格转变尺寸大于Al-0.04Er-0.04Zr合金。Al-0.04Er-0.08Zr合金在500 °C时效100 h后，由于Zr/Er比较高，部分析出相转变为D 023相，而Al-0.04Er-0.04Zr合金中的析出相保持L12相。
The temporal evolution of the Al3(ErZr) precipitates is investigated in Al–0.04Er–0.04Zr and Al–0.04Er–0.08Zr alloys during aging at elevated temperature of 450 and 500 °C. The results show that the coarsening behavior of the precipitates in both alloys is similar, due to the core–shell structure with Zr segregated in the shell of the Al3(ErZr) precipitates. With the increase of the amount of Zr addition, the misfit between the precipitate and the Al matrix decreases, consequently the coherency transition size of the precipitates in Al–0.04Er–0.08Zr is larger than that of Al–0.04Er–0.04Zr. After aging at 500 °C for 100 h, some of the precipitates in Al–0.04Er–0.08Zr transform to D023structure due to the high Zr/Er ratio, while the precipitates in Al–0.04Er–0.04Zr keep the L12structure.