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Korean Journal of Metals and Materials > Volume 54(12); 2016 > Article
Korean Journal of Metals and Materials 2016;54(12): 875-884. doi: https://doi.org/10.3365/KJMM.2016.54.12.875
연강에서 상온 변형 기구에 미치는 냉각 속도의 영향
김성수1, 이윤상2, 김영석3
1한국원자력연구원 자력재료안전연구부
2한국원자력연구원 연구로핵연료기술개발부
3한국원자력연구원 원자력소재개발부
The Effects of Cooling Rate on Deformation Mechanism at Room Temperature in Mild Steel
SungSoo Kim1, Yoon Sang Lee2, Young Suk Kim3
1Korea Atomic Energy Research Institute, Reactor Nuclear Materials Safety Research Division, Daejeon 34057, Republic of Korea
2Korea Atomic Energy Research Institute, Nuclear Fuel Technology of Research Reactor Division, Daejeon 34057, Republic of Korea
3Korea Atomic Energy Research Institute, Nuclear Materials Development Division, Daejeon 34057, Republic of Korea
Correspondence  SungSoo Kim ,Tel: +82-42-868-2061, Email: sskim6@kaeri.re.kr
Received: 27 May 2016;  Accepted: 23 June 2016.  Published online: 5 December 2016.
ABSTRACT
The deformation mechanism at room temperature in water quenched (WQ) and furnace cooled (FC) mild steels was investigated in a plane tilted 45° from the tensile direction, using electron back scattered diffraction, XRD, and TEM. The occurrence of (211) twinning was confirmed by pole figures and the slip systems were analyzed by variation in full width half maximum during tensile deformation. In WQ steel the deformation occurred through both (211) twinning and (110) slip in the low strain region, and by (211) slip in the high strain region. However, in FC the deformation was produced by both (211) twinning and (211) slip in the low strain region and (211) twinning and (110) and (211) slip in the high strain region in FC.
Keywords: alloys, deformation, twinning, XRD, deformation mechanism
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