An ultrafine grained austenitic stainless steel sample (with average grain size of 270 nm) was prepared by means of accumulative rolling and annealing treatment. Uniaxial tensile tests at room temperature showed the ultrafine grained sample exhibits an extremely high yield strength of 1870 ± 50 MPa and a tensile strength as high as 1950 ± 30 MPa, while the elongation retains 6 ± 1%. The deformation has been dominated by twinning and slip of partial dislocations.

中文翻译：

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超细晶粒奥氏体不锈钢累积轧制和退火的超高强度

通过累积轧制和退火处理制备了超细晶粒奥氏体不锈钢试样（平均晶粒尺寸为270 nm）。室温单轴拉伸试验表明，超细晶粒试样的屈服强度高达 1870±50 MPa，拉伸强度高达 1950±30 MPa，而伸长率保持在 6±1%。变形主要是部分位错的孪晶和滑移。