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Hot deformation behavior of an Nb- and N-bearing austenitic stainless steel biomaterial

机译：含Nb和N的奥氏体不锈钢生物材料的热变形行为

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摘要

An austenitic stainless steel (ISO 5832-9) with an intermediate level of stacking fault energy (SFE) was torsion-deformed at temperatures ranging from 900 to 1200 ℃ and at strain rates ranging from 0.01 to 10 s~(-1). The hot deformation behavior was analyzed based on variations in the shape of flow stress curves, a constitutive equation, processing maps and the final microstructures. In large deformations, a region of instability in the temperature-strain rate space was observed at low temperature and high strain rates, and domains of easy processing were determined at high and intermediate temperatures and low strain rates. The final microstructure was analyzed based on the evolution of the internal structure over time in response to hardening and softening mechanisms such as work hardening, recovery and recrystallization.
机译：具有中等水平的堆垛层错能（SFE）的奥氏体不锈钢（ISO 5832-9）在900至1200℃的温度和0.01至10 s〜（-1）的应变速率下发生扭转变形。基于流动应力曲线形状的变化，本构方程，加工图和最终的微观结构，分析了热变形行为。在大变形中，在低温和高应变速率下观察到温度-应变速率空间中的不稳定性区域，并且在高温和中温和低应变速率下确定了易于加工的区域。根据内部结构随时间的变化对最终的微观结构进行分析，以响应硬化和软化机制（例如加工硬化，恢复和再结晶）。

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