材料韧脆转变温度数据处理方法探讨

On the method of data processing for ductile-brittle transition temperature

对韧脆转变温度曲线形状的分析和几种常见回归数学模型的比较发现 ,Boltzmann函数具有相关系数高、残差小、适应性强及参数物理意义明确的特点。

After characteristic analysis of ductile-brittle transition temperature curve and comparison of several regression functions with S shape, it is found that Boltzmann function has higher correction coefficient, lower remaining errors, powerful adaptability and explicit physical meaning. Boltzmann function is proposed to depict relative curves of impact energy vs. temperature and percent ductile fracture vs. temperature.