Microstructure and Mechanical Properties of High-Nitrogen Austenitic Stainless Steels Subjected to Equal-Channel Angular Pressing
来源期刊：Acta Metallurgica Sinica2016年第2期
论文作者：Fu-Yuan Dong Peng Zhang Jian-Chao Pang Qi-Qiang Duan Yi-Bin Ren Ke Yang Zhe-Feng Zhang
文章页码：140 - 253
摘 要：Three high-nitrogen stainless steels with different N contents were successfully processed by equal-channel angular pressing for one pass, and their microstructures and mechanical properties were investigated. It was found that the microstructure of the billet was heterogeneous across the billet thickness, resulting in the difference in the mechanical properties due to the different deformation conditions. A relatively low strength, high uniform elongation, and high workhardening rate for the samples at the bottom of the billet was achieved in comparison with those processed at the top.Meanwhile, it was observed that the density of deformation twins increased with the content of N; accordingly, the strength and elongation of the alloys increase with the content of N, resulting in a good strength–ductility combination.
Fu-Yuan Dong，Peng Zhang，Jian-Chao Pang，Qi-Qiang Duan，Yi-Bin Ren，Ke Yang，Zhe-Feng Zhang
Shenyang National Laboratory for Materials Science,Institute of Metal Research, Chinese Academy of Sciences
摘 要：Three high-nitrogen stainless steels with different N contents were successfully processed by equal-channel angular pressing for one pass, and their microstructures and mechanical properties were investigated. It was found that the microstructure of the billet was heterogeneous across the billet thickness, resulting in the difference in the mechanical properties due to the different deformation conditions. A relatively low strength, high uniform elongation, and high workhardening rate for the samples at the bottom of the billet was achieved in comparison with those processed at the top.Meanwhile, it was observed that the density of deformation twins increased with the content of N; accordingly, the strength and elongation of the alloys increase with the content of N, resulting in a good strength–ductility combination.
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