Improvements of the crystallographic approach to plastic strain ratio in deep drawing steel sheets  

作　　者：赵骧 徐家桢 梁志德 黄丽明 

机构地区：[1]Department of Materials Sdenoe and Engineering, Northeastern University, Shenyang 110006, China [2]Department of Mechanics, Tianjin Light Industry Institute, Tianjin 300222, China Among various methods for calculation of the plastic strain ratio (γvalue) of deep drawing steel sheet, the crystallographic approach is rather preferred because it is founded on the slip action during the crystal plastic deformation, while the crystal deformation mechanisms are fully taken into account. Thus it possesses a more soundly theoretical basis. However, its two assumptions, i.e. the same critical shear stresses for the three different slip systems in BCC and no orientation changes for all crystallites in tensile test samples in elongation up to 15%, are inconsistent with the experimental evidence.

出　　处：《Chinese Science Bulletin》1996年第19期1606-1609,共4页

基　　金：Project supported by the Doctor Foundation of the state Education Commission of China ;the Doctor Foundation of Liaoning Province.

摘　　要：Among various methods for calculation of the plastic strain ratio (γ value) of deep drawing steel sheet, the crystallographic approach is rather preferred because it is founded on the slip action during the crystal plastic deformation, while the crystal deformation mechanisms are fully taken into account. Thus it possesses a more soundly theoretical basis. However, its two assumptions, i.e. the same critical shear stresses for the three different slip systems in BCC and no orientation changes for all crystallites in tensile test samples in elongation up to 15％, are inconsistent with the experimental evidence.

关 键 词：PLASTIC STRAIN ratio TAYLOR FACTOR ODF. 

分 类 号：TG113.25[金属学及工艺—物理冶金]