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  1. No Access

    Article

    Quantifying Susceptibility to Solidification Cracking in Oscillated CM247LC Superalloy Welds via Varestraint Testing

    CM247LC, a Ni-based superalloy, is employed in the high-temperature components of gas turbines, such as the blades. However, the welds of CM247LC are highly susceptible to various types of cracking, thereby li...

    Kyeong-Min Kim, Uijong Lee, Hyungsoo Lee… in Metals and Materials International (2023)

  2. No Access

    Article

    Influence of Segregation on Microstructure and Hot Workability of Grade 250 Maraging Steel

    The optimal process parameters of grade 250 maraging steel for hot forging were investigated with a process map and microstructure analysis. To generate the process map, hot compression tests were performed at...

    Hyungsoo Lee, Hi Won Jeong, Seong Moon Seo… in Metals and Materials International (2021)

  3. No Access

    Article

    Effects of Cr and Fe Addition on Microstructure and Tensile Properties of Ti–6Al–4V Prepared by Direct Energy Deposition

    The effects of Cr and Fe addition on the mechanical properties of Ti–6Al–4V alloys prepared by direct energy deposition were investigated. As the Cr and Fe concentrations were increased from 0 to 2 mass%, the ...

    Yool Byun, Sangwon Lee, Seong-Moon Seo… in Metals and Materials International (2018)

  4. No Access

    Article

    Edge-Cracking Behavior of CoCrFeMnNi High-Entropy Alloy During Hot Rolling

    This work investigated edge-cracking behavior of equiatomic CoCrFeMnNi high-entropy alloy during hot rolling at rolling temperatures 500 ≤ TR ≤ 1000 °C. Edge cracks did not form in the material rolled at 500 °C, ...

    Jong Woo Won, Minju Kang, Heoun-Jun Kwon, Ka Ram Lim… in Metals and Materials International (2018)

  5. No Access

    Article

    Effect of minor alloying elements La, C and B on the cyclic oxidation behavior of Ni-Cr-W-Mo superalloys

    The cyclic oxidation behavior of Ni-Cr-W-Mo base alloys with various La, C and B contents is investigated at 1150 °C in ambient air with 15 min of high-temperature exposure and 5 min of air cooling. Oxidation ...

    Dae Won Yun, Seong Moon Seo, Hi Won Jeong… in Metals and Materials International (2017)

  6. No Access

    Article

    High temperature oxidation resistance of Ni-(5∼13)Co-(10∼16)Cr-(5∼9)W-5Al-(1∼1.5)Ti-(3∼6)Ta alloys

    The oxidation behavior of Ni-based superalloys was examined by cyclic oxidation tests at 850 and 1000 °C. The present study focused on the investigation of two newly developed and three commercial alloys (GTD-...

    Hee-Soo Kim, Si-Jun Park, Seong-Moon Seo… in Metals and Materials International (2016)

  7. No Access

    Article

    Grain structure and texture evolutions during single crystal casting of the Ni-base superalloy CMSX-4

    The solidification grain structure and texture evolutions during single crystal (SX) casting of the advanced Ni-base superalloy CMSX-4 have been investigated. In order to understand the development of the soli...

    Seong-Moon Seo, In-Soo Kim, Je-Hyun Lee… in Metals and Materials International (2009)

  8. No Access

    Article

    High temperature deformation mechanism and evolution of dislocation structure during creep of Ni-Base superalloy 713LC

    Creep deformation of cast nickel base superalloy 713LC has been investigated in a temperature range of 723 to 982°C. The values of the stress exponent and activation energy for creep of the alloy vary with a c...

    In Soo Kim, Baig Gyu Choi, Seong Moon Seo… in Metals and Materials International (2006)

  9. No Access

    Article

    Microstructural evolution of DS CM186LC during creep and thermal exposure

    Thermal exposure tests were carried out at the same temperature and duration as those of creep tests. Growth of γ′ either in the matrix or in the interdendritic regions was observed during high temperature the...

    Chang-Yong Jo, Doo-Hyun Kim, Seong-Moon Seo, In-Soo Kim… in Metals and Materials (2000)