Rolling Temperature Tailoring of Nanocrystalline Phases and Tensile Properties of Exceptional Nanocrystalline/Microcrystalline 316L Stainless Steel
Rolling Temperature Tailoring of Nanocrystalline Phases and Tensile Properties of Exceptional Nanocrystalline/Microcrystalline 316L Stainless Steel
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纳米晶相的轧制温度调整和特殊纳米晶/微晶 316L 不锈钢的拉伸性能
DOI:
10.1002/srin.201700263
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发表时间:
2018-02
影响因子:
2.2
通讯作者:
Ma Fuliang
中科院分区:
文献类型:
--
作者:
Yuan Miwen;Han Yijun;La Peiqing;Wei Fuan;Ma Fuliang
The effects of the rolling temperature on nanocrystalline phases and tensile properties of nanocrystalline/microcrystalline 316L stainless steel, that is, fabricated by the aluminothermic reaction method are investigated in this study. The rolling experiments are first performed at 1073 K with 40% and then with a 70% thickness reduction at the temperatures of 1073, 973, and 873 K. X‐Ray Diffraction (XRD) and SEM are used to analyze the evolution of the phases, and the microstructure is characterized using TEM. When the rolling temperature is 1073 K, the initial nano‐grains disappears gradually with the increasing rate of thickness reduction and are followed by the formation of the new sub‐micro grain phase. While the elongation increase to 24% monotonically, the strength of the steels initially increases and then decreases. When the rolling temperature decreases to 873 K, 316L stainless steels obtain a typical bimodal structure and achieve a super balance of high strength and considerable ductility (σ0.2 = 702 MPa, EL. = 20%). The nano‐grain fraction of approximately 50% is the optimized structure for bimodal grain size 316L stainless steel.
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DOI:
10.1016/j.msea.2016.07.048
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10.1016/j.msea.2012.10.002
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