Stabilizing the strengthening precipitates in aluminum-manganese alloys by the addition of tungsten
Stabilizing the strengthening precipitates in aluminum-manganese alloys by the addition of tungsten
复制标题
添加钨稳定铝锰合金中的强化析出物
DOI：
10.1016/j.msea.2017.03.025
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
M. Makhlouf
中科院分区：
文献类型：
--
作者：
Yangyang Fan;M. Makhlouf
The Al-Mn-W system has considerable potential as a basis for lightweight aluminum alloys that are intended for use at temperatures approaching 350 °C (623 K). In this ternary system, aluminum, manganese, and tungsten co-precipitate to form the meta-stable Al12(Mn(1-x)Wx) phase, which is thermally stable and will not coarsen when held at elevated temperatures for extended periods of time. This enhanced thermal stability of the Al12(Mn(1-x)Wx) phase in comparison to the Al12Mn phase which forms in binary Al-Mn alloys is explained in terms of the Gibbs free energy of the two phases. It is shown that co-precipitating tungsten with aluminum and manganese lowers the Gibbs free energy of the precipitated phase and by so doing, it slows down its coarsening rate and enhances its thermal stability.
