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首页> 外文期刊>Materials Science and Engineering >Achieving high strain rate superplasticity in Mg-Y-Nd-Zr alloy processed by homogenization treatment and equal channel angular pressing
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Achieving high strain rate superplasticity in Mg-Y-Nd-Zr alloy processed by homogenization treatment and equal channel angular pressing

机译：通过均质化和等通道角挤压加工获得的Mg-Y-Nd-Zr合金高应变率超塑性

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摘要

Homogenization treatment and equal channel angular pressing was applied to Mg-Y-Nd-Zr alloy cast ingot. Uniform grains with a grain size of ～ 1.5 μm and spherical secondary-phase preferentially located at the grain boundaries were obtained. Excellent high-strain rate superplasticity of 860% and 960% was achieved at 500 ℃, 1 ×10~(-1) s~(-1) and 475 ℃, 2 × 10~(-2) s~(-1) respectively, for the first time such a high-strain rate superplasticity was achieved in magnesium alloys processed by ECAP. The maximum elongation of 1120% was achieved at 475 ℃, 3 × 10~(-3) s~(-1). They were attributed to the thermal stability of uniform fine-grain microstructure and the coordination function of secondary-phase.
机译：对Mg-Y-Nd-Zr合金铸锭进行均质化处理和等通道角挤压。获得晶粒尺寸约为1.5μm的均匀晶粒，且球形第二相优先位于晶界。在500℃，1×10〜（-1）s〜（-1）和475℃，2×10〜（-2）s〜（-1）时，分别获得860％和960％的优良高应变率超塑性。分别在ECAP加工的镁合金中首次实现了如此高的应变率超塑性。在475℃，3×10〜（-3）s〜（-1）条件下，最大伸长率为1120％。它们归因于均匀细晶粒微观结构的热稳定性和第二相的配位功能。

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