수소주입된 고강도 DP 박강판의 소형펀치시험결과 분석
An Analysis of Small Punch Test Conducted with the High Strength Dual Phase Sheet Steels Charged with Hydrogen
0
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
The small punch(SP) tests that can be applied to high strength sheet steel in automobile were carried outto evaluate the behavior of hydrogen embrittlement of DP sheet steels. In order to charge hydrogen at DPsheet steels, DP sheet steels were treated by the electrochemical hydrogen charging method under the chargingconditions of current densities of 100, 150 and 200 mA/cm2 for charging times of 5, 10, 25 and 50 hrs. Respectively, After hydrogen charging with experimental conditions, SP tests were performed. From the SPresults, the correlations between the variation of bulb diameters and bulb heights with the hydrogen chargingconditions were analysed. It was shown that the variation of bulb diameters were not significant with thehydrogen embrittlement due to the amounts of hydrogen charging. On the other hand, the bulb heights wereobserved to decrease with increasing hydrogen contents. It was thought that these results of the variationof bulb shapes after SP tests would be estimated as the index of evaluation of hydrogen embrittlement.
Abstract
The small punch(SP) tests that can be applied to high strength sheet steel in automobile were carried out to evaluate the behavior of hydrogen embrittlement of DP sheet steels. In order to charge hydrogen at DP sheet steels, DP sheet steels were treated by the electrochemical hydrogen charging method under the charging conditions of current densities of 100, 150 and 200 mA/cm2 for charging times of 5, 10, 25 and 50 hrs. Respectively, After hydrogen charging with experimental conditions, SP tests were performed. From the SP results, the correlations between the variation of bulb diameters and bulb heights with the hydrogen charging conditions were analysed. It was shown that the variation of bulb diameters were not significant with the hydrogen embrittlement due to the amounts of hydrogen charging. On the other hand, the bulb heights were observed to decrease with increasing hydrogen contents. It was thought that these results of the variation of bulb shapes after SP tests would be estimated as the index of evaluation of hydrogen embrittlement
참고문헌 (8)
- J. Watanabe, , J. Iron Steel Inst. Jpn, 82, pp.947~ (1996)
- G. Katano, , J. Mater. Sci, 36, pp.2277~ (2001)
- 박재우, "소형펀치시험을 이용한 자동차용 고강도강 수소취성 평가", 한국재료학회지, 22(1), pp.29~34 (2012), 한국재료학회
- 최종운, "미소경도 측정에 의한 590DP강 Subsurface Zone 내 수소취성 평가", 한국재료학회지, 21(11), pp.581~586 (2011), 한국재료학회
- X. Mao, , J. Test. Eval, 15, pp.30~ (1987)
- H. Matsui, , Mater. Sci. Eng, 40, pp.227~ (1979)
- M. Wang, , Corros. Sci, 49, pp.4081~ (2007)
- J. U. Choi, , J. Kor. Inst. Surf. Eng, 41, pp.126~ (2013)