【摘要】 为了解AZ31镁合金自由锻过程中织构的形成和变化,用ODF分析对AZ31镁合金在自由锻时的微曲向流变行为进行了分析;用光学显微镜对其显微组织和晶粒尺寸进行了测定.结果表明:锻造变形形成不完全动态再结晶,造成Mg17A l12相析出和组织不均匀.与锻压面相平行的均以{1217}和{1214}、{0115}面织构为主,并且随形变量变化而相互转换.当形变量为31%时{0115}面织构的ODF强度值达到最大.锻造产生的面织构将增加镁合金的各向异性,不利于改善镁合金的塑性变形能力和力学性能.更多还原

【Abstract】 Using ODF’s analysis,the micro-orientated flowing behavior of magnesium alloy AZ31 by forging was investigate,and using optical microscopy,the grain size and microstructure were measured.The results showed that the precipitation phase Mg₁₇Al₁₂ and structure heterogeneity are generated by incomplete dynamic recrystallization during forging,the {1217}、{1214} and {0115} texture run parallel to the forging plane and interconvert with the variation of deformation;when the deformation was greater than 31%,the ODF of {0115} plane is the biggest.The aeolotropic property is increased by plane texture because of forging,that goes against the improvement of plastic deformation and mechanical property of magnesium alloy.更多还原