A new approach to grain refinement of an Mg-Li-Al cast alloy
A new approach to grain refinement of an Mg-Li-Al cast alloy
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DOI：
10.1016/j.jallcom.2009.11.066
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发表时间：
2010-03
影响因子：
6.2
通讯作者：
B. Jiang;D. Qiu;Mingxing Zhang;P. Ding;Liang Gao
中科院分区：
文献类型：
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作者：
B. Jiang;D. Qiu;Mingxing Zhang;P. Ding;Liang Gao
基于边-边匹配模型的晶体学计算表明，TiB 2和Al 3 Ti金属间化合物与β相之间存在较小的原子匹配错配，因此具有很强的细化β相的潜力。结果表明，添加1.25wt%Al-5 Ti-1B中间合金后，合金中β相的晶粒尺寸从1750 μm减小到500μm。并对可能的晶粒细化机制进行了讨论。
Crystallographic calculation based on the edge-to-edge matching model predicted that both TiB2and Al3Ti intermetallic compounds have strong potential to be effective grain refiners for β phase in the Mg–14Li–1Al alloy due to the small atomic matching misfit across the interface between the compounds and β phase. Experimental results showed that addition of 1.25wt%Al–5Ti–1B master alloy reduced grain size of β phase in the alloy from 1750 to 500μm. The possible grain refining mechanisms were also discussed.