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Grain Size Effect on Microstructure Evolution and Properties of 304 Austenitic Stainless Steel |
SUN Jingli(),ZHOU Haitao,CHEN Li,WU Hong,LIU Weili,YAO Fei,XU Yuling |
Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600,China |
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Cite this article:
SUN Jingli,ZHOU Haitao,CHEN Li,WU Hong,LIU Weili,YAO Fei,XU Yuling. Grain Size Effect on Microstructure Evolution and Properties of 304 Austenitic Stainless Steel. Chinese Journal of Materials Research, 2020, 34(3): 231-240.
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Abstract 304 austenitic stainless steel was pre-heated in the conditions of different temperatures and time to produce samples with close texture but different grain size. Then the effect of the subsequent compression and heat treatment on the microstructure evolution and properties of the obtained samples was investigated. Results show that the initial grain size played an important role in the final texture of the sample after deformation and heating. The texture in the initial sample with coarse grains changed much more than that in the sample with finer grains. For the samples with close textures, grain size has greater effect on their tensile strength; For samples with different texture, the texture has greater effect on mechanical properties rather than the grain size and micro stain. During the deformation and subsequent heating, the increase of macro strain within the grains and high angle boundaries with high energies lowered the corrosion resistance of 304 steel. However, after deformation, the preferred orientation texture with four planes of close-packed lattice emerged on the samples, thereby, the corrosion resistance of the steel could be increased to some extent.
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Received: 15 September 2019
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Fund: Shanghai Pujiang Program(15PJ1433600) |
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