Effect of Prior Austenite Grain Size on Hole Expansion Ratio of Quenching and Partitioning Processed Medium-Mn Steel
- Title
- Effect of Prior Austenite Grain Size on Hole Expansion Ratio of Quenching and Partitioning Processed Medium-Mn Steel
- Author
- 김진경
- Issue Date
- 2019-04
- Publisher
- SPRINGER
- Citation
- JOM, v. 71, No. 4, Page. 1366-1374
- Abstract
- The effect of the prior austenite grain size (PAGS) on the tensile properties and hole expansion ratio (HER) has been investigated. Starting from different PAGS values (4.7 m and 15.2 m) obtained by controlling the austenitizing temperature, microstructure consisting of martensite and austenite (V of 0.09-0.18) was produced by the quenching and partitioning process. Increasing V had a beneficial influence on the tensile elongation regardless of the PAGS, but deteriorated the HER. However, larger PGAS alleviated the degradation of the HER. The major influence of a larger PAGS on the HER results from the decreased population of interface between neighboring martensite in the shear-affected zone, because that interface is revealed to be a major site for void formation during hole expansion testing.
- URI
- https://link.springer.com/article/10.1007%2Fs11837-019-03332-yhttps://repository.hanyang.ac.kr/handle/20.500.11754/113226
- ISSN
- 1047-4838; 1543-1851
- DOI
- 10.1007/s11837-019-03332-y
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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