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.
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.
出处
《材料与冶金学报》
CAS
2006年第3期221-225,230,共6页
Journal of Materials and Metallurgy
基金
国家高技术研究发慌计划资助项目(863计划:2003AA331080)
关键词
锻造
镁合金
织构
再结晶
孪生
forging
magnesium
textures
recrystallization
twinning.
