수소주입시킨 680MPa DP강의 나노인덴터 시험
Nanoindenter Test of 680MPa Dual Phase Steel Charged with Hydrogen
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Nanoindentater tests were conducted to conducted nanoindentation microhardness of the individual phaseof ferrite and martensite of 680MPa dual-phase (DP) steel charged with hydrogen. Hydrogen was chargedby electrochemical method with current densities of 150, 200 mA/cm2 for charging times of 5, 10, 25, 50 hours,respectively. Nanoindenter test results showed that the nanoindentation microhardnesses of ferrite phase ofDP steel were varied from min. 1.58 GPa to max. 2.82 GPa, and the nanoindentation microhardnesses ofmartensite phase varied from min. 3.19 GPa to max. 5.16 GPa with the variation of hydrogen charging conditions. It was observed that the variations of the nanoindention microhardnesses of martenstie phase werehigher than those of ferrite phases. It was thought that martensite phase in the 680MPa DP steel was moresensitive than ferrite phase to hydrogen embrittlement.
Abstract
Nanoindentater tests were conducted to conducted nanoindentation microhardness of the individual phaseof ferrite and martensite of 680MPa dual-phase (DP) steel charged with hydrogen. Hydrogen was chargedby electrochemical method with current densities of 150, 200 mA/cm2 for charging times of 5, 10, 25, 50 hours,respectively. Nanoindenter test results showed that the nanoindentation microhardnesses of ferrite phase ofDP steel were varied from min. 1.58 GPa to max. 2.82 GPa, and the nanoindentation microhardnesses ofmartensite phase varied from min. 3.19 GPa to max. 5.16 GPa with the variation of hydrogen charging conditions. It was observed that the variations of the nanoindention microhardnesses of martenstie phase werehigher than those of ferrite phases. It was thought that martensite phase in the 680MPa DP steel was moresensitive than ferrite phase to hydrogen embrittlement.
참고문헌 (14)
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