Design of low-Ni martensitic steels with novel cryogenic impact toughness exceeding 190 J
- Authors
- Lee, Hyun Wook; Park, Tak Min; Seo, Namhyuk; Lee, Seok-Jae; Lee, Changmin; Han, Jeongho
- Issue Date
- Apr-2022
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Martensitic steel; Retained austenite; Charpy impact toughness; Heat treatment process
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.840, pp.1 - 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 840
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/139007
- DOI
- 10.1016/j.msea.2022.142959
- ISSN
- 0921-5093
- Abstract
- This study aimed to develop steels with reasonable material costs to replace Fe–9Ni (wt.%) steel, which is suitable for cryogenic applications. To this end, a newly designed Fe–2Mn–5Ni-0.1C steel was treated by quenching–tempering (QT) and quenching–lamellarizing–tempering (QLT); subsequently, the microstructural evolutions and resultant impact absorbed energy were systematically investigated. At −196 °C, the QLT-processed steel exhibited a higher impact absorbed energy (∼193 J) than the QT-processed steel (∼168 J), and it was similar to that of Fe–9Ni steel. The excellent impact absorbed energy of the QLT-processed sample was attributed to the high damage tolerance afforded by the active transformation-induced plasticity from the retained austenite and the pronounced plastic deformation of the soft martensitic matrix due to double-step tempering.
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