论文标题
在MG-ZN合金中加强锥体滑移
Precipitate strengthening of pyramidal slip in Mg-Zn alloys
论文作者
论文摘要
Mg-4wt。％Zn合金单晶沿[0001]方向的机械性能通过23C和100C的微骨压缩测量。基底滑动在经过处理的合金溶液中占主导地位，而在降水硬化的合金中发生了锥体滑移。锥体位错通过形成Orowan循环的沉淀物，导致均匀变形和强硬。基于Orowan模型的屈服应力的预测与实验数据合理地吻合。杆状的存在垂直于基底平面导致Mg的塑性各向异性降低。
The mechanical properties of Mg-4wt.% Zn alloy single crystals along the [0001] orientation were measured through micropillar compression at 23C and 100C. Basal slip was dominant in the solution treated alloy, while pyramidal slip occurred in the precipitation hardened alloy. Pyramidal dislocations pass the precipitates by forming Orowan loops, leading to homogeneous deformation and to a strong hardening. The predictions of the yield stress based on the Orowan model were in reasonable agreement with the experimental data. The presence of rod-shape precipitates perpendicular to the basal plane leads to a strong reduction in the plastic anisotropy of Mg.
