Abstract
Microstructure evolution and mechanical properties of 316L austenitic stainless steel with aluminum addition by warm rolling at 550 °C were investigated. It is found that sample is composed of an ashen austenite matrix, a gray black ferrite phase and a small number of NiCx. The average grain sizes are 21.62, 19.66 and 19.49 μm for samples with the rolling deformation of 30%, 50% and 70%, respectively. The yield strength and tensile strength of samples with solid solution time of 30 min and deformation of 70% are higher. The fracture modes are similar and belong to toughness fracture. The fracture surfaces of the samples are composed of relatively large equal-axis ductile dimples (5–15 μm) and fine scattered ones around the dimples (< 5 μm). As the rolling deformation increases, the quantity of subgrain boundary increases and the < 101 > orientation is more prominent. {001} < 110 > rotation-cube textures are present in ferrite phase of samples and weak Goss texture is formed in austenite pole images.
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Acknowledgements
The work was supported by the National Natural Science Foundation of China (51561020), the Gansu Provincial Science and Technology Support Program (1304GKCA027) and the China Postdoctoral Science Foundation (2015M572615, 2016T90959).
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Guo, X., La, Pq., Li, H. et al. Microstructure evolution and mechanical properties of 316L austenitic stainless steel with aluminum addition by warm rolling. J. Iron Steel Res. Int. 25, 1068–1077 (2018). https://doi.org/10.1007/s42243-018-0155-7
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DOI: https://doi.org/10.1007/s42243-018-0155-7