【摘要】 通过试验研究了Fe-Mn-C系TWIP钢的拉伸应变硬化行为。结果表明:试验钢在拉伸过程中的应变硬化表现为阶段性多n值行为。其应变硬化机制有两种:在0.4%~3%的应变区间为位错强化阶段,10%~50%的应变区间为孪晶强化阶段。在这两个区间内n值皆为定值,而在4%~10%的应变区间n值呈不断上升趋势。更多还原

【Abstract】 The strain hardening behaviour of Fe-Mn-C TWIP steel was investigated.It was showed there existed different n values in different phases during the tensile strain hardening of samples.There were also two strain hardening mechanisms: in the region of 0.4%-3% strain,samples were strengthened by dislocation piling,but in the region of 10%-50% strain,by twinning.In these two regions,the n value kept constant,However,n increased continuously in the region of 4%-10%.The microstructure observation showed that the fractures of the Fe-Mn-C TWIP steel were typical ductile fracture pattern.更多还原