施密特因子分布图预测锆的变形行为（英文）  

Schmid Factor Maps for Predicting Slip and Twinning Behaviors in Zirconium

作　　者：辛超[1] 孙巧艳[1] 肖林[1] 孙军[1] Xin Chao;Sun Qiaoyan;Xiao Lin;Sun Jun(State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学金属材料强度国家重点实验室

出　　处：《稀有金属材料与工程》2019年第8期2400-2405,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51471129,51671158,51621063);“973” Program of China(2014CB644003);“111” Project of China(B06025)

摘　　要：由拉伸应力方向与c轴夹角及拉伸应力方向在基面投影与基面a轴夹角为自变量绘制了锆及锆合金中不同变形方式的施密特因子分布图并做了分析和研究。变形方式包括基面滑移,柱面滑移和锥面滑移的<a>和<c+a>滑移系和{1012},{1121},{1122}和{1011}4组孪晶系。每个独立变形方式下的软取向和硬取向被确定。施密特因子分布图结合实验中每种变形方式的临界剪切应力可以有效预测每种变形方式的相对活性并能够很好地吻合现有的实验结果。A series of Schmid factor(SF)maps for different slip and twinning modes in zirconium were calculated and illustrated as a function of the tensile angle between the applied stress and the c-axis together with the projective angle on the basal plane.The results show that the deformation modes include three groups of slip systems,i.e.basal slip,prismatic slip,pyramidal<a>and<c+a>slip,and four groups of twinning systems,i.e.1012},{1121},{1122}and{1011}.The"soft"and"hard"orientation zones of individual plastic deformation modes were determined.A variant selection criterion for slip and twinning of zirconium was proposed.The plastic deformation mechanism was interpreted based on the Schmid factor maps in combination with the experimental data of the critical resolved shear stress(CRSS)under different deformation modes.The predicted plastic deformation mechanism is consistent with the experimental results.

关 键 词：施密特定律 滑移 孪晶 变体选择 各向异性 锆 

分 类 号：TG146.414[一般工业技术—材料科学与工程]