Towards an understanding of microstructural evolution during post deformation annealing of asymmetrically deformed nanostructured low carbon steel

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作者

Young Gun Ko¹

1. Yeungnam University

会议/活动

The Korea Society for Technology of Plasticity, November 2022 (Jeju, South Korea)

海报摘要

The annealing behavior of nanostructured 0.18 wt.% carbon steel samples fabricated via differential speed rolling (DSR) process was investigated at temperatures between 425 ℃ and 625 ℃ for 1 hour. Deformation by the DSR process at room temperature resulted in a complex microstructure in the ferrite phase consisting of an equiaxed structure with grain size of ~0.4 μm and a lamellar structure width of ~0.35 μm. The textures evolved in the LCS sample after 4-pass DSR deformation consisted of the rolling and shear texture. During heat treatment at 475 ℃ for 1 hour, an ultrafine-grained microstructure with a ferrite grain size of ~0.8 μm was obtained. The grain boundary misorientation of the nanostructured ferrite grains were evaluated quantitatively, and ~67% of the boundaries were found to be high-angled boundaries of which was similar to deformed and annealed at higher temperatures.

关键词

Low carbon steel, Differential speed rolling, Annealing, Microstructure, Texture

研究领域

Material Sciences

参考文献

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基金

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补充材料

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附加信息

利益冲突

No competing interests were disclosed.

数据可用性声明

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

知识共享许可协议

Copyright © 2024 Ko. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.