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首页> 外文期刊>Scripta materialia >Effects of substituting rare-earth elements for scandium in a precipitation-strengthened Al-0.08at. percent Sc alloy
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Effects of substituting rare-earth elements for scandium in a precipitation-strengthened Al-0.08at. percent Sc alloy

机译:在沉淀强化的Al-0.08at中用稀土元素替代scan的效果。百分比Sc合金

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摘要

The microhardness of Al-0.06 Sc-0.02 RE alloys (at. percent, with RE (rare-earth) = Dy, Er, Gd, Sm, Y, or Yb) is measured as a function of aging time at 300 deg C. As compared to Al-0.08 Sc, the ternary alloys exhibit: (i) the same incubation time, except for Al-0.06 Sc-0.02 Yb which hardens much faster; (ii) the same or reduced peak microhardnesses (which are higher than for Al-0.06 Sc); and (iii) the same over-aging behavior. All REs segregate to the core of Al_3(Sc_(1-x)RE_x) precipitates.
机译:测量Al-0.06 Sc-0.02 RE合金的显微硬度(百分数,RE(稀土)= Dy,Er,Gd,Sm,Y或Yb)与300℃时效时间的关系。与Al-0.08 Sc相比,三元合金具有:(i)相同的保温时间,但Al-0.06 Sc-0.02 Yb的硬化速度更快; (ii)相同或降低的峰值显微硬度(高于Al-0.06 Sc的峰值显微硬度); (iii)相同的过度老化行为。所有RE都分离到Al_3(Sc_(1-x)RE_x)沉淀的核心。

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