利用拉伸实验装置研究了高强IF钢在高应变速率下的变形特性。结果表明：高强IF钢是应变速率敏感性材料,在应变速率10-4～103/s的范围内,应变速率对高强IF钢的应变硬化率与屈服强度的影响具有2阶段性。在第一阶段,应变速率较低,应变硬化率与屈服强度对应变速率的敏感性较小;在第二阶段,应变速率较高,随应变速率的增加,应变硬化率迅速降低,屈服强度迅速增加。
The deformation characteristics of a high strength IF steel at high strain rates were investigated by the testing apparatus of split Hopkinson tension bar.It is shown that the high strength IF steel is a rate-sensitivity material.There are two stages in the effect of strain rate on strain hardening rate and yield strength at the range of strain rate from 10-4 to 103 s-1.In the first stage,there is little sensitivity of strain hardening rate and yield strength to strain rate.In the second stage,there is obvious strain rate sensitivity and strain hardening rate decreases rapidly and yield strength increases rapidly with the increase of strain rate.
参考文献
| [1] | 马鸣图.先进汽车用钢[M].北京:化学工业出版社,2007:31-55. |
| [2] | 王先进;王作成;唐荻.成分及工艺对加磷高强IF钢成形性能的影响[J].钢铁,1993(03):34-38. |
| [3] | 赵子苏,毛卫民,余永宁,王利.钛对高强IF钢第二相粒子析出规律和力学性能的影响[J].钢铁,2000(09):47-51. |
| [4] | BAKSHI S D;DUTTA M;BHATTACHARJEE D .Effect of finish hot rolling temperature on the surface quality of galvannealed IF-HS steel sheets[J].ISIJ International,2001,45(09):1368-1370. |
| [5] | 王鹏飞,罗斌强,胡时胜.套管式冲击拉伸实验装置的研制[J].实验力学,2009(06):513-518. |
| [6] | 刘瑞堂;刘文博;刘锦云.工程材料力学性能[M].哈尔滨:哈尔滨工业大学出版社,2001:24. |
| [7] | 尚兵,盛精,王宝珍,胡时胜.不锈钢材料的动态力学性能及本构模型[J].爆炸与冲击,2008(06):527-531. |
| [8] | 冯端.金属物理学[M].北京:北京科学技术出版社,1999:240. |
| [9] | 柳永宁;朱金华;周惠久 .普通低碳钢的强度与温度、应变速率的关系[J].材料科学进展,1990,4(04):285-290. |
| [10] | 唐长国;朱金华;周惠久 .金属材料屈服强度的应变速率效应和热激活理论[J].金属学报,1995,31(06):248-253. |
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