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应变速率敏感性指数用m表示,它的大小称为m值。它是材料超塑性的一个重要参数。m值的大小意味着材料在变形过程中抗缩颈能力的高低。测得的m值能否正确代表材料的超塑性,取决于m值的测试和计算方法。本文的目的在于提出一种精确的m值测定方法。
Strain rate sensitivity index is expressed in m, its size is called m value. It is an important parameter of material superplasticity. The value of m means the anti-necking ability of the material in the deformation process. Measured m value can correctly represent the superplasticity of the material, depending on the m value of the test and calculation methods. The purpose of this paper is to propose an accurate method of m value determination.