Strain Hardening and Strain Rate Sensitivity Behaviors of Advanced High Strength Steels  

作　　者：F Ozturk A Polat S Toros R C Picu 

机构地区：[1]Department of Mechanical Engineering, Nigde University [2]Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute,Troy 12180, New York, USA

出　　处：《Journal of Iron and Steel Research International》2013年第6期68-74,共7页

摘　　要：The mechanical properties of commercial dual phase （DP）, transformation induced plasticity （TRIP）, and high strength low alloy （HSLA-340） steel sheets are investigated and compared at various strain rates ranging from 0.001 7to 0.17 s-1 at ambient temperature.TRIP steel outperforms the other two materials , having comparable ductility and twice as large strength relative to DP steel.TRIP has larger strength and much larger ductility than HSLA-340.The exceuent ductility of TRIP800is due to its high strain hardening capability , which promotes stable plastic deformation.It is observed that the strain hardening rate in TRIP800does not decrease to zero at failure , as common in most materials in which failure is preceded by necking.The mechanical properties of commercial dual phase （DP）, transformation induced plasticity （TRIP）, and high strength low alloy （HSLA-340） steel sheets are investigated and compared at various strain rates ranging from 0.001 7to 0.17 s-1 at ambient temperature.TRIP steel outperforms the other two materials , having comparable ductility and twice as large strength relative to DP steel.TRIP has larger strength and much larger ductility than HSLA-340.The exceuent ductility of TRIP800is due to its high strain hardening capability , which promotes stable plastic deformation.It is observed that the strain hardening rate in TRIP800does not decrease to zero at failure , as common in most materials in which failure is preceded by necking.

关 键 词：STEEL advanced high strength steel HSLA DP TRIP HARDENING 

分 类 号：TG142.33[一般工业技术—材料科学与工程]