Precipitates and precipitation behavior in Al–Zr–Yb–Cr alloys
Precipitates and precipitation behavior in Al–Zr–Yb–Cr alloys
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DOI：
10.1016/j.matlet.2012.02.013
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发表时间：
2012-05
影响因子：
3
通讯作者：
H. Fang;P. Shang;L. Huang;K. H. Chen;Guo-cong Liu;Xunhui Xiong
中科院分区：
文献类型：
--
作者：
H. Fang;P. Shang;L. Huang;K. H. Chen;Guo-cong Liu;Xunhui Xiong
Al-0.16wt.%中的析出相及其析出行为Zr-0.30重量% Yb-0.18重量%研究了500°C下的Cr合金。通过组合添加Zr、Yb和Cr，在500°C下的均匀化期间均匀地沉淀相对高密度的共格且良好分散的L12结构的（Al，Cr）3（Zr，Yb）分散体。这些分散体即使在暴露400小时后仍保持基本上15- 25 nm的尺寸。（Al，Cr）3（Zr，Yb）弥散相在500°C附近比L12结构的Al 3 Zr和Al 3（Zr，Yb）弥散相更细且更抗粗化。Zr、Yb和Cr的复合添加使合金中析出相均匀、密度高，从而改善了合金的沉淀硬化效果。
The precipitates and precipitation behavior in Al–0.16wt.%Zr–0.30 wt.%Yb–0.18 wt.%Cr alloy at 500°C is studied. By adding Zr, Yb and Cr in combination, a relatively high density of coherent and well-dispersed L12-structured (Al, Cr)3(Zr, Yb) dispersoids are uniformly precipitated during homogenization at 500°C. These dispersoids are coherent with the sizes remaining essentially 15–25nm even after being exposed for 400h. The (Al, Cr)3(Zr, Yb) dispersoid is finer and more coarsening-resistant than L12-structured Al3Zr and Al3(Zr, Yb) dispersoids around 500°C. The uniform and high density precipitation leads to an improvement of precipitation-hardening effect by adding Zr, Yb and Cr in combination.