Contrary to the commonly observed embrittlement during dynamic strain aging, we report in this note distinct enhancement in ductility in a Nb-containing and nitrogen stabilized Fe-25(wt%)Ni-20Cr austenitic stainless steel (Alloy 709) at temperatures from 623 K to 873 K at 10⁻⁴ s⁻¹ where serrated flow is noted. This observation is rationalized in terms of the influence of strain hardening parameters and strain rate sensitivity on uniform elongation and ductility respectively.

中文翻译：

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Fe-25Ni-20Cr奥氏体不锈钢在动态应变时效过程中延展性的提高

与通常在动态应变时效过程中观察到的脆化相反，我们在本报告中指出，在623 K的温度下，含Nb和氮稳定的Fe-25（wt％）Ni-20Cr奥氏体不锈钢（合金709）的延展性显着提高。在10 ^-4 s ^-1达到873 K，其中锯齿状流动。根据应变硬化参数和应变率敏感性分别对均匀伸长率和延展性的影响，使该观察合理化。