Microstructural Study of Advanced High Strength Dual-Phase Steels Sheet Under Stretch-Bending Forming Process

Abstract

Abstract:

Stretchbending is a typical method for sheet stamping forming. Different fracture failure modes occur on advanced high strength dual phase steel based on different stress state. For example, shear fracture occurs under tight radius stretchbending condition. In this paper, a stretchbending ratio α was introduced to indicate different stress states to determine the failure mode: necking or shear fracture. Stretchbending experiments of DP steels were conducted and fracture morphology was observed. The results show that shear fracture still belongs to ductile fracture, and tighter punch radius or higher DP strength leads to shear fracture much more easily.

Key words：

Key words: high strength dual phase steel, stretchbending experiment, shear fracture, stress state, microstructure

CLC Number:

TG 386

HE Chunfeng,ZHAO Yixi,HUANG Sheng. Microstructural Study of Advanced High Strength Dual-Phase Steels Sheet Under Stretch-Bending Forming Process[J]. Journal of Shanghai Jiaotong University, 2014, 48(05): 618-623.

References

［1］康永林，邝霜，尹显东，等. 汽车用双相钢板的开发与研究进展［J］. 汽车工艺与材料, 2006 (5): 15.

KANG Yonglin, KUANG Shuang, YIN Xiandong, et al. Research on progress and development of dual phase steel sheet for automobiles ［J］. Automobile Technoligy and Material, 2006 (5):15.

［2］Santos A D, Teixeira P. A study on experimental benchmarks and simulation results in the sheet forming ［J］. Journal of Materials Processing Technology, 2008, 199(13): 32736.

［3］Luo M, Wierzbicki T. Numerical failure analysis of a stretchbending test on dualphase steel sheets using a phenomenological fracture model ［J］. International Journal of Solids and Structures, 2010, 47(2223): 30843102.

［4］李梅，赵亦希，胡星，等. 先进高强度双相钢汽车板剪切断裂试验［J］.上海交通大学学报，2011, 45(11): 16951699.

LI Mei, ZHAO Yixi, HU Xing, et al. Experimental study of shear fracture on advanced high strength dualphase steels［J］. Journal of Shanghai Jiaotong University, 2011, 45(11): 16951699.

［5］黄群飞，何燕霖，罗娟娟，等. 高马氏体含量双相钢组织及变形研究［J］. 材料热处理学报，2008, 29(5): 4952.

HUANG Qunfei, HE Yanlin, LUO Juanjuan, et al. Study on microstructure and deformation behavior of dualphase steels with highmartensite content ［J］. Transactions Materials and Heat Treatment, 2008, 29(5): 4952.

［6］AvramovicCingra G, Ososkov Y. Effect of martensite distribution on damage behavior in DP600 dual phase steels ［J］. Material Science and Engineering A, 2009, 516(12): 716.

［7］方圆，刘雅政, 周乐育,等. 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92.

FANG Yuan, LIU Yazheng, ZHOU Leyu, et al. Effect of martensite volume fraction on deformation dislocation structure and fracture for hot rolled dualphase steel ［J］. Iron and Steel, 2009, 44(8): 4952.

［8］Walp M, Wurm A, Siekirk J, et al. Shear fracture in advanced high strength steels ［EB/OL］.［20130802］. http:∥papers.sae.org/2006011433/.

［9］Wang W R, Wei X C. Shear fracture of dual phase AHSS in the process of stamping ［C］∥The 8th International Conference and Workshop on numerical simulation of 3D seet metal forming processes (NUMISHEET 2011).

USA： American Institute of Physics, 2011:439445.

［10］Emmens W C, Van den Boogaard A H. Cyclic stretchbending: Mechanics, stability and formability ［J］. Journal of Materials Processing Technology, 2011, 211(12):19651981.

［11］赵亦希，李梅，李淑慧，等. 柔性拉伸弯曲成形断裂特征模具［P］. 中国专利：CN201110223812.9. 20130619.

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