文献类型：期刊文章

作　　者：刘迪[1] 刘祖岩[1] 王尔德[1]

机构地区：[1]哈尔滨工业大学材料科学与工程学院金属精密热加工国家级重点实验室,哈尔滨150001

出　　处：《Transactions of Nonferrous Metals Society of China》

年　　份：2015

卷　　号：25

期　　号：11

起止页码：3585-3594

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EBSCO、EI、IC、INSPEC、JST、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：In order to investigate the dependence of microstructure and mechanical properties on the rolling process parameters, AZ31 magnesium alloy sheets with different grain sizes, basal texture intensities and twinning types were obtained using hot rolling at various temperatures and reductions. The volume fractions of the extension, contraction and secondary twins in the as-rolled sheets depend on the grain size. The highest volume fractions of three types of twins are obtained at 523 K under the reduction of 10% when the average grain size value is the maximum. The critical reductions for complete dynamic recrystallization are 30% at 523 K and 40% at 473 K. The increase of yield strength is ascribed to both grain-refinement strengthening and basal texture strengthening at the first stage. When the grain size does not decrease with increasing the reduction, the yield strength is mainly influenced by the texture weakening.

关 键 词：AZ31 magnesium alloy  dynamic recrystallization  TWINNING texture  mechanical properties  

分 类 号：TG339] TG146.22[材料类]