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Effect of severe plastic deformation on an extruded ZK60 magnesium alloy

机译:严重塑性变形对挤出ZK60镁合金的影响

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Equal channel angular pressing (ECAP) was carried out on extruded ZK60 magnesium alloy until an equivalent strain of ~4 (corresponding to 4 passes) at 523K following route Bc. The effect of the deformation on both microstructure and texture was investigated by analysis of inverse pole figures and pole figures respectively, determined by EBSD. Additionaly, the mechanical properties were evaluated through tensile tests. The ECAPed processed ZK60 alloy showed the presence of dynamic recrystallization (DRX) process, correlated with a strong basal fiber texture. The presence of pyramidal slip was also observed, which can be correlated with the presence on twin-oriented boundaries in the material. Both the grain size reduction and the existence of texture influenced the ductility of the magnesium alloy processed by ECAP, as the ductility of the ZK60 alloy after four ECAP passes increased two times in comparation with the initial (un-processed) material.
机译:在挤出的ZK60镁合金上进行等电气角压(ECAP),直至在BC路径下,在523K下在523K处的〜4(对应于4次通过的等效菌株。 通过分别通过EBSD确定的逆极图和极图来研究变形对微结构和质地的影响。 辅助,通过拉伸试验评估机械性能。 杂备的加工式ZK60合金显示出动态再结晶(DRX)过程的存在,与强基底纤维质地相关。 还观察到锥体滑移的存在,其可以与材料中的双向边界的存在相关。 晶粒尺寸减小和纹理的存在影响了ECAP处理的镁合金的延展性,因为ZK60合金的延展性在四个ECAP经过的比较后增加了两次与初始(未加工)材料的比较。

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