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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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In this work, microstructural and hardness evolution of the X20 steel upon short-term creep test (550oC to 650oC, 180oC to 60 MPa) was studied by using scanning electron microscope, electron backscattered diffraction, and transmission electron microscope, microhardness tester. After creep rupture, gauge and grip part of the specimens were microstructurally analyzed. Creep at the 650oC/60 MPa resulted in a rupture at 1,460 hours with growth of lath width from 1.31 to 2.87 μm and a grain growth with a more equiaxed feature. There is a close relationship between Microhardness and lath width.
The formation and coarsening of Laves phase, which was observed up to 600oC of creep temperature, was accelerated by the applied stress. Slight coarsening of the M23C6 was observed in the 550oC and 600oC crept or aged specimens. The coarsening of M23C6 depended on the temperature, where specimens crept at 650oC showed higher growth rate.
The microstructural evolution of X20 after short-term creep test was extensively discussed in relation to the long-term creep/aging test reported in literatures.
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참고문헌 (23)
참고문헌 신청
Abe F / 2004 / Coarsening behavior of lath and its effect on creep rates in tempered martensitic 9Cr--W steels / Mater. Sci. Eng : 387 ~ 569
Aghajani A / 2009 / On the effect of longterm creep on the microstructure of a 12% chromium tempered martensite ferritic steel / Acta Mater 57 : 5093 ~ 5106
Aghajani A / 2009 / On the formation and growth of Mo-rich Laves phase particles during long-term creep of a 12% chromium tempered martensite ferritic steel / Scripta Mater 6
Chen R P / 2011 / Long-term microstructural degradation and creep strength in Gr.91 steel / Mater. Sci. Eng 528 : 4390 ~ 4394
Cui H / 2010 / Precipitation behavior of Laves phase in 10%Cr steel X12CrMoWVNbN10-1-1 during short-term creep exposure / Mater. Sci. Eng 527 : 7505 ~ 7509
Aghajani A / 2009 / On the effect of longterm creep on the microstructure of a 12% chromium tempered martensite ferritic steel / Acta Mater 57 : 5093 ~ 5106
Aghajani A / 2009 / On the formation and growth of Mo-rich Laves phase particles during long-term creep of a 12% chromium tempered martensite ferritic steel / Scripta Mater 6
Chen R P / 2011 / Long-term microstructural degradation and creep strength in Gr.91 steel / Mater. Sci. Eng 528 : 4390 ~ 4394
Cui H / 2010 / Precipitation behavior of Laves phase in 10%Cr steel X12CrMoWVNbN10-1-1 during short-term creep exposure / Mater. Sci. Eng 527 : 7505 ~ 7509
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