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Effect of strain rate on the fracture toughness reference temperature T_o for ferritic steels

机译:应变速率对铁素体钢断裂韧性参考温度T_o的影响

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The new master curve concept for describing materials fracture toughness in the transition region, with the help of a reference temperature T_0, is a candidate for structural integrity assessment codification. Normally, T_0 is determined for (quasi) static strain rates, while often dynamic values are required. The master curve concept can of course be applied also to dynamic tests, but this would require a double amount of testing. Fracture toughness data found in the literature was analyzed with the master curve concept and a simple semiempirical expression for the strain rate dependence of T_0 was developed. The error of the expression is only of the order +-20
机译:在参考温度T_0的帮助下,用于描述过渡区域材料断裂韧性的新主曲线概念是进行结构完整性评估编码的一种候选方法。通常,T_0是针对(近似)静态应变率确定的,而通常需要动态值。主曲线的概念当然也可以应用于动态测试,但这将需要两倍的测试量。使用主曲线概念分析了文献中发现的断裂韧性数据,并开发了一个简单的半经验表达式,表示T_0的应变率依赖性。表达式的误差仅约为+ -20

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