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引入不等温韧性的概念，并定义其为不同温度下的断面收缩率。研究表明，材料的不等温韧性与存在于各种工业加工过程中的温度梯度有关。温度梯度越大，不等温韧性越低。
The concept of non-isothermal toughness is introduced, and the reduction of area is defined as the temperature at different temperatures. Research shows that the non-isothermal toughness of materials is related to the temperature gradient existing in various industrial processes. The larger the temperature gradient, the lower the non-isothermal toughness.