Abstract：Effect of martensite volume fraction on deformation dislocation structure and fracture for hot rolled dualphase steel of the same composition was studied by using SEM and TEM. The results show that effect of martensite volume fraction on deformation dislocation structure of DP steel is little when martensite volume fraction is between 20% and 30%. And martensite would appear both region of high dislocation density and region of low dislocation density after deformation. Furthermore, the micropore in DP steel would change into microcrack when martensite volume fraction reached 30%. Meanwhile necking appeared early. So when martensite volume fraction was 20%, forming property of DP steel was better than the DP steel whose martensite volume fraction was 30%.
方圆;刘雅政;周乐育;宋仁伯;黄全伟. 马氏体体积分数对热轧双相钢形变位错结构和断裂的影响[J]. 钢铁, 2009, 44(8): 89-0.
FANG Yuan;LIU Yazheng;ZHOU Leyu;SONG Renbo;HUANG Quanwei. Effect of Martensite Volume Fraction on Deformation Dislocation Structure and Fracture for Hot Rolled DualPhase Steel. Iron and Steel, 2009, 44(8): 89-0.
2009, Vol. 44 
