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GTD-111DS, IN738 가스터빈 버켓 재질의 열처리에 따른 재질 특성변화
김문영(Moon Young Kim),강신구(Sin Gu Kang),박성열(Seng Yeal Park),양성호(Sung Ho Yang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The gas turbine components is used on high temperature conditions which under severely circumstance with material strength. Therefore, it is used nickel-base superalloys like IN738 and GTD-111DS. Damaged buckets on the tip during operating are repaired per 24,000hr to three times according to manufacture specification. It is applied pre-heat, HIP(hot isostatic pressing) and post-heat treatment to support welding repair on blade tip effectively. On this study, It is utilize of WRAP™(welding repair advanced process) method to make tension test specimens for this study. Andthen, it analyzed material strength and characteristic after normal tension test. This will be reviewed strength and material characteristic through compared with creep and creep fatigue test results for laser welding test specimens continually.