Improvement of Low Temperature Toughness of Ferritic Mn Steels by Alloy Modification
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- Title
- Improvement of Low Temperature Toughness of Ferritic Mn Steels by Alloy Modification
- Authors
- Yi, IC; Ha, Y; Kwon, KH; Lee, H; Kim, NJ
- Date Issued
- 2015-05
- Publisher
- KOREAN INST METALS MATERIALS
- Abstract
- A study has been made on the effects of Mn content and addition of Al on the microstructure and mechanical properties of (4-6)Mn steels, with the aim of developing fenitic Mn steels having good combination of tensile properties and impact toughness. It has been shown that the reduction of Mn content to 6 wt% and lower from 8-12 wt% of conventional steels can effectively prevent the occurrence of intergranular fracture, which has been a major problem of (8-12)Mn steels with poor toughness at cryogenic temperature. While increasing Mn content in the binary (4-6)Mn steels results in an increase in strength and a decrease in impact toughness, the addition of 1A1 to (4-6)Mn steels results in improvements in both strength and impact toughness as compared to those of the binary (4-6)Mn steels and the best impact toughness has been obtained in the as-rolled 1A1 added 4Mn steel, whose microstructure consists of fine acicular ferrite grains.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26950
- DOI
- 10.1007/S12540-015-4588-2
- ISSN
- 1598-9623
- Article Type
- Article
- Citation
- METALS AND MATERIALS INTERNATIONAL, vol. 21, no. 3, page. 461 - 469, 2015-05
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