Investigation into the stress-strain curves of deformation-induced ferrite transformation in a low carbon steel  

作　　者：ZHAO Shengsheng ZHAO Heshan 

机构地区：[1]Shenzhen Polytechnic,Shenzhen 518055,China [2]Silicon Steel Department,Baoshan Iron&Steel Co.,Ltd.,Shanghai 200941,China

出　　处：《Baosteel Technical Research》2012年第2期49-54,共6页宝钢技术研究（英文版）

摘　　要：A series of tests of deformation-induced ferrite transformation （DIP-T） in a low carbon steel were carried out by the Gleeble-3500 hot simulation machine at a temperature range of Ae3-Ar3. The overall stress-strain curves during DIFT can be divided into three typical types： ＂double-humped＂,＂ single-humped＂ and ＂transitional＂. The peaks exhibited in the curve are involved with deformation-induced transformation which happened in grains or at the grain boundaries. According to the stress-time curve and strain-time curve, strain capacity dramatically postponed the strain-induced transformation, which leads to the start of the transformation right ahead of the finish of deformation and the majority of the ferrite transformation process mainly happened after the deformation. Deformation-induced transformation is a metadynamic transformation process with dynamic nucleation.A series of tests of deformation-induced ferrite transformation （DIP-T） in a low carbon steel were carried out by the Gleeble-3500 hot simulation machine at a temperature range of Ae3-Ar3. The overall stress-strain curves during DIFT can be divided into three typical types： ＂double-humped＂,＂ single-humped＂ and ＂transitional＂. The peaks exhibited in the curve are involved with deformation-induced transformation which happened in grains or at the grain boundaries. According to the stress-time curve and strain-time curve, strain capacity dramatically postponed the strain-induced transformation, which leads to the start of the transformation right ahead of the finish of deformation and the majority of the ferrite transformation process mainly happened after the deformation. Deformation-induced transformation is a metadynamic transformation process with dynamic nucleation.

关 键 词：low carbon steel deformation-induced ferrite transformation stress-strain curve metadynamic transformation 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]