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首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Zr Content on the Yield Strength of an Al-Sc Alloy
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Effects of Zr Content on the Yield Strength of an Al-Sc Alloy

机译：Zr含量对Al-Sc合金屈服强度的影响

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摘要

The effects of Zr content on the yield strength of an Al-Sc alloy are investigated experimentally. It has been shown that the yield strength increases with time at the beginning of annealing for the investigated one Al-Sc alloy and three Al-Sc-Zr alloys. Such an increase of yield strength results from the high nucleation rate for Al_3Sc particles in Al-Sc alloy and Al_3(Sc_(1-x),Zr_x) particles in Al-Sc-Zr alloys. Throughout the annealing, the yield strength increases with the Zr content, indicating that the alloy with higher Zr content possesses higher yield strength. The high yield strength of the alloy with high Zr content is due to the higher number density and volume fraction of the particles as well as their smaller size and inter-particle spacing. Such a microstructural feature for the particles exhibits a larger Orowan strengthening effect by inhibiting the dislocation movements.
机译：实验研究了Zr含量对Al-Sc合金屈服强度的影响。已经表明，对于一种被研究的Al-Sc合金和三种Al-Sc-Zr合金，在退火开始时屈服强度随时间的增加而增加。屈服强度的这种增加归因于Al-Sc合金中的Al_3Sc颗粒和Al-Sc-Zr合金中的Al_3（Sc_（1-x），Zr_x）颗粒的高成核率。在整个退火过程中，屈服强度随Zr含量的增加而增加，表明Zr含量较高的合金具有较高的屈服强度。具有高Zr含量的合金的高屈服强度归因于较高的颗粒数密度和体积分数，以及较小的尺寸和颗粒间间距。颗粒的这种微结构特征通过抑制位错运动表现出更大的Orowan增强作用。

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