Effect of solution hardening on high-speed deformation for ferritic steels
Effect of solution hardening on high-speed deformation for ferritic steels
复制标题
固溶硬化对铁素体钢高速变形的影响
DOI：
10.3139/146.030053
复制
发表时间：
2003
影响因子：
0.8
通讯作者：
Y. Tomota
中科院分区：
文献类型：
--
作者：
Jong;Y. Tomota
在温度77~773K，应变速率为3.3×10−3 S−1的条件下，测量了无间隙(IF)钢和填充碳(CP)钢的拉伸流动曲线。用KocksMecking模型估算了2.0×10−3 S−1处的流动曲线，并与霍普金森压杆法的结果进行了比较。根据IF和CP钢在低应变速率下获得的数据确定了模型的参数，得到了令人满意的−=2.0×10~3的流动应力。在进行温度变化试验时，变形组织演变的温度依赖性对流动应力几乎没有影响。在295K时，IF钢的2.0×10 3 S−1和3.3×10−3 S−1之间的流动应力之比或差值大于CP钢，但0K时流动应力的热分量经固溶淬火后有所增加。这些结果通过模型计算得到了合理的解释。
Abstract Tensile flow curves of interstitial-free (IF) and C- and Padded (CP) steels were measured at temperatures from 77 to 773 K with a strain rate of 3.3 × 10−3 s−1. Flow curves at 2.0 × 10−3 s−1 were estimated by using the Kocks-Mecking model and compared with the results obtained by a Hopkinson pressure bar method. Flow stresses at 2.0 × 103 s−1 were satisfactorily estimated when the parameters of the model were determined from the data obtained at low strain rates both for IF and CP steels. The temperature dependence of the deformation microstructure evolution hardly affected the flow stress when a temperature change test was performed. The flow stress ratio or difference between 2.0 × 103 s−1 and 3.3×10−3 s−1 at 295 K was larger for IF steel than for CP steel although a thermal component of flow stress at 0 K was estimated to increase by solid solution hardening. These results are reasonably explained by a model calculation.