李鱼鱼,韩廷状,楚志兵,薛春,杨千华,赵晓东,高虹.应变路径变化对AZ31镁合金力学行为的影响[J].稀有金属材料与工程,2022,51(8):2785~2793.[Li Yuyu,Han Tingzhuang,Chu Zhibing,Xue Chun,Yang Qianhua,Zhao Xiaodong,Gao Hong.Effect of Strain Path on Mechanical Behavior of AZ31 Magnesium Alloy[J].Rare Metal Materials and Engineering,2022,51(8):2785~2793.]
应变路径变化对AZ31镁合金力学行为的影响
投稿时间:2021-06-27  修订日期:2021-08-04
中文关键词:  AZ31镁合金  应变路径  力学行为  孪晶  位错  织构
基金项目:National Key R&D Program of China (2018YFB1307902), National Natural Science Foundation of China (U1710113), Joint Postgraduate Training Base of Shanxi Province (2018JD33), Top young talents in Shanxi Province, Shanxi Excellent Youth Fund (201901D211312), Innovative talents in Colleges and universities of Shanxi Province, Outstanding young academic leaders in Shanxi Province, Transformation and cultivation project of scientific and technological achievements in Colleges and universities of Shanxi Province(2019KJ028), Leading talents of emerging industries in Shanxi Province, Postgraduate Education Innovation Program of Shanxi Province (2019SY482)
中文摘要:
      以挤压态AZ31镁合金棒材为原材料,在室温下沿着∥ED和⊥ED的方向进行预变形实验,模拟二辊皮尔格冷轧过程中减壁段横截面瞬时变形应力状态,接着对预变形试样取样进行二次压缩,利用电子背散射衍射(EBSD)对2次变形之后的微观结构进行表征。研究了应变路径变化情况下组织和织构对力学行为的影响。结果表明,预变形使AZ31镁合金的屈服强度提高,其主要原因是预变形产生的拉伸孪晶导致晶粒细化和位错密度增加。并且孪晶的出现会改变晶粒的取向,基面织构弱化(或孪生织构增强)在改善AZ31镁合金力学性能方面可能起到更重要的作用。∥ED-3%和⊥ED-3%试样的屈服强度分别提高了66.7%和6.6%。
Effect of Strain Path on Mechanical Behavior of AZ31 Magnesium Alloy
英文关键词:AZ31 magnesium alloy  strain path  mechanical behavior  twin  dislocation  texture
英文摘要:
      Extruded AZ31 magnesium alloy was used as raw specimens, and pre-deformation experiments were conducted in the direction of ∥ED (extrusion direction) and ⊥ED at room temperature. The instantaneous deformation stress state of a cross-sectional reduced wall was simulated in the cold Pilgering process. Then, the pre-deformed specimens were sampled for secondary compression, and the microstructure after two deformations was characterized by electron backscatter diffraction. The effects of structure and texture on mechanical behavior under the condition of strain path change were investigated. Results show that the yield strength of the AZ31 magnesium alloy is improved by pre-deformation. The improvement is attributed to the {102} tension twins resulting from the pre-deformation, further resulting in grain refinement and increase in dislocation density. Moreover, the appearance of twinning changes the grain orientation. The weakening of the basal texture (or the strengthening of the twin texture) may play an important role in improving the mechanical properties of the AZ31 magnesium alloy. The yield strength of the ∥ED-3% and ⊥ED-3% samples is increased by 66.7% and 6.6%, respectively.
作者单位E-mail
李鱼鱼 太原科技大学 905409420@qq.com 
韩廷状 西北工业大学  
楚志兵 太原科技大学  
薛春 太原科技大学  
杨千华 太原科技大学  
赵晓东 太原科技大学  
高虹 江苏武进不锈股份有限公司  
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