• Title/Summary/Keyword: 인코넬738LC

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Low-Cycle Fatigue in Ni-Base Superalloy IN738LC at Elevated Temperature (니켈기 초내열합금 IN738LC의 고온 저주기피로 거동)

  • Hwang, Kwon-Tae;Kim, Jae-Hoon;Yoo, Keun-Bong;Lee, Han-Sang;Yoo, Young-Soo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.34 no.10
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    • pp.1403-1409
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    • 2010
  • For many years, high-strength nickel-base superalloys have been used to manufacture turbine blades because of their excellent performance at high temperatures. The prediction of fatigue life of superalloys is important for improving the efficiency of the turbine blades. In this study, low cycle fatigue tests are performed for different values of total strain and temperature. The relations between strain energy density and number of cycles before failure occurs are examined in order to predict the low cycle fatigue life of IN738LC super alloy. The results of low cycle fatigue lives predicted by strain energy methods are found to coincide with experimental data and with the results obtained by the Coffin-Manson method.

A Study on the friction weldability of inconel alloy-stainless steel (인코넬 합금과 스테인레스 강의 마찰용접 특성 연구)

  • 김의환;민택기
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.2
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    • pp.73-78
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    • 2001
  • In this study, the friction weldability and properties of inconel alloy(IN738LC) to stainless steel (STS304) was investigat-ed. Upset length increased according to increment of friction pressure and time. The tensile strength of the friction weld-ing reached 85% of the STS304 base metal strength under the conditions of 8 sec friction time, 50MPa friction pressure and 150 MPa upset pressure. From the result of fracture surface analysis, IN738LC section can be joined with STS 304 materials in shape of a convex lens. Also, the temperature of welded interface was measured with k-type thermocouple. Finally the plastic flow confirmed at the welded interface STS304 by micro test.

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