摘要
以纯钛箔和纯铝箔为原料,通过热压和热轧制制备层状Ti-Al复合材料。使用原位电子背散射衍射技术,研究层状复合材料拉伸过程中的取向演化和形变微结构特征。结果表明,Ti晶粒内部塑性变形存在不均匀性,即越靠近晶界或Ti/Al层状界面,Ti晶粒的塑性变形越困难。这种晶内变形不均匀性主要来自于晶界和Ti/Al相界的协同约束效应。因此,本研究提供了一种通过充分利用界面约束效应来调控塑性变形行为从而实现性能优化的新策略。
A multilayered Ti−Al composite was designed and fabricated by hot pressing and hot rolling of alternately stacked Ti and Al foils.In situ electron backscatter diffraction was utilized to characterize the orientation evolution and deformed substructure upon tension.A remarkably inhomogeneous deformation mode was observed within the interior of Ti grains,in a way that the closer to the grain boundary or Ti/Al interfaces,the harder the plastic flow.Such a phenomenon is attributed to the synergetic constraint of phase interface and grain boundary.The present study thus provides a new strategy to tailor the deformation behavior of metallic materials by sufficiently leveraging the interfacial constraint effect for performance optimization.
作者
倪新波
刘壮壮
缪克松
冷金凤
范国华
滕新营
吴昊
Xin-bo NI;Zhuang-zhuang LIU;Ke-song MIAO;Jin-feng LENG;Guo-hua FAN;Xin-ying TENG;Hao WU(School of Materials Science and Engineering,University of Jinan,Jinan 250022,China;Key Laboratory for Light-weight Materials,Nanjing Tech University,Nanjing 211816,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)
基金
financially supported by the National Natural Science Foundation of China(Nos.52171117,52001161,51927801,51871111)
JianHua Research Foundation of Hebei University of Technology,China(Nos.HB1921,HB1920)
the Natural Science Foundation of Jiangsu Province,China(Nos.BK20200695,BK20202010)。
关键词
层状复合材料
塑性变形
电子背散射衍射
界面约束
layered composites
plastic deformation
electron backscatter diffraction
interfacial constraint
