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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Characterization of a thermomechanically processed powder metallurgy Al-5wt.% Mg-1.2wt.% Cr alloy
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Characterization of a thermomechanically processed powder metallurgy Al-5wt.% Mg-1.2wt.% Cr alloy

机译：热机械加工粉末冶金Al-5wt。％Mg-1.2wt。％Cr合金的特性

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摘要

A thermomechanical processing (TMP) was carried out in a powder metallurgy extruded Al-5wt.% Mg-1.2wt.% Cr alloy to obtain a line-grained material. The extruded billets showed elongated (sub)grains, oriented towards the β-fiber orientations, where the intensity maximum was located at the brass component (Bs). After annealing at 550℃ for 48 h, the (sub)grains remained elongated toward the extrusion direction, whereas the intensity of the Bs component increased. After TMP which consisted of various reductions by cold rolling up to 90% with intermediate annealing, the microstructure developed a banded structure, composed of elongated (sub)grains of size 0.5-1 μm, and the intensity of orientations along the β-fiber decreased considerably. After annealing at 500℃ for 48 h, the TMP material showed recrystallized grains 5-8 μm in size with a weak rotated cube texture.
机译：在粉末冶金挤出的Al-5wt。％Mg-1.2wt。％的Cr合金中进行热机械加工（TMP）以获得线粒状材料。挤压的坯料显示出拉长的（亚）晶粒，朝向β纤维取向，其中最大强度位于黄铜成分（Bs）处。在550℃退火48 h后，（亚）晶粒向挤压方向伸长，而Bs组分的强度增加。在经过中间退火后冷轧至90％的各种形式的TMP减少后，显微组织形成了带状结构，由尺寸为0.5-1μm的细长（亚）晶粒组成，沿β纤维的取向强度降低了相当。在500℃退火48小时后，TMP材料显示出5-8μm的重结晶晶粒，具​​有弱的旋转立方纹理。

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