应变硬化指数n反映了金属材料抵抗均匀塑型变形的能力，是表征金属材料应变硬化行为的性能指标。
塑性应变比与应变硬化指数是评价板料成形性能的两个重要参数。
Thirdly, plastic strain ratio and strain hardening index are the two key parameters of material's formability.
进行三种ST钢的应变硬化指数n值试验，分析试验结果，研究n值在整个应变区间的变化趋势。
This paper has studied the changes about tensile strain hardening exponent (n-value) in three kinds of st steels by testing n-values and found changing tendency of them.
相对于常规奥氏体轧制，铁素体轧制薄板的屈服强度下降了20%左右，伸长率及应变硬化指数与之相当。
Compared with the strip produced by conventional austenite rolling, the yield strength of the ferrite rolled strip was lower by about 20%, with same elongation and strain hardening exponent.
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