材料绝热剪切敏感性表征及测试方法研究  

Characterization of Adiabatic Shear-Band Susceptivity and Relevant Testing

作　　者：谭成文[1] 王富耻[1] 刘远宏[1] 苏铁健[1] 李树奎[1] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081

出　　处：《北京理工大学学报》2004年第5期377-379,391,共4页Transactions of Beijing Institute of Technology

基　　金：国家"九七三"计划项目(510003)

摘　　要：为了定量评价不同材料对绝热剪切变形的敏感程度差异,采用绝热剪切扩展能的衍生量——绝热剪切敏感因子Ψ表征这一差异,并建立了相应的实验测试系统.采用此测试系统对两种不同组织的新型贝氏体钢进行了绝热剪切敏感性测试,测试结果与前人的认识一致.定量地解决了绝热剪切敏感性的评价问题和测试问题,为进一步工程应用奠定了基础.In order to characterise adiabatic shear susceptivity of materials quantitatively, validity in using the parameter Ψ derived from adiabatic shear-band processing energy in evaluating the difference among materials is demonstrated. Forced shear testing (FST) loaded by the split Hopkinson pressure bar(SHPB) is developed to accomplish the adiabatic shear-band susceptivity testing. An integrated experimental data processing method was put forward. Using FST, optimized samples and experimental data processing method, two materials having different structures were tested, the results are found to be consistent with cognitions well accepted (thus far.)

关 键 词：绝热剪切敏感性 表征 强迫剪切 

分 类 号：O346.1[理学—固体力学] TG457[理学—力学]