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  1. 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)

  2. No Access

    Article

    Statistics of oxidation resistance of Ni–(0–15)Co–(8–15)Cr–(0–5)Mo–(0–10)W–(3–8)Al–(0–5)Ti–(0–10)Ta–0.1C–0.01B superalloys at 1000 °C by compositional variations

    The effects of alloying elements (Co, Cr, Mo, W, Al, Ti, and Ta) on the oxidation resistance of Ni–(0–15)Co–(8–15)Cr–(0–5)Mo–(0–10)W–(3–8)Al–(0–5)Ti–(0–10)Ta–0.1C–0.01B alloys were studied. The sample composit...

    Si-Jun Park, Kyu-Hyuk Lee, Seong-Moon Seo, Hi-Won Jeong, Young-Soo Yoo… in Rare Metals (2020)

  3. No Access

    Article

    Effect of Minor Alloying Elements on the Oxidation Behavior of Ni-Base Alloys in a High-Temperature Steam Environment

    Model alloys based on Alloy 617 were fabricated with modified minor alloying elements for improvement in oxidation resistance in high-temperature steam environments. Model alloys were grouped as one with Ti an...

    Sung Hwan Kim, Chaewon Kim, Ji-Hwan Cha, Changheui Jang… in Oxidation of Metals (2019)

  4. 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)

  5. 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)

  6. No Access

    Article

    Effect of Ruthenium on Precipitation Behavior of the Topologically Close-Packed Phase in a Single-Crystal Ni-Based Superalloy During High-Temperature Exposure

    The precipitation behaviors of the topologically close-packed (TCP) phase in the Ru-free and Ru-containing single-crystal Ni-based superalloys have been investigated. All the TCP phases have been identified as...

    **peng Tan, **lai Liu, Tao **, Zhuangqi Hu… in Metallurgical and Materials Transactions A (2012)

  7. No Access

    Article

    On the Role of Grain Boundary Serration in Simulated Weld Heat-Affected Zone Liquation of a Wrought Nickel-Based Superalloy

    The effects of grain boundary serration on boron segregation and liquation cracking behavior in a simulated weld heat-affected zone (HAZ) of a wrought nickel-based superalloy 263 have been investigated. The se...

    Hyun Uk Hong, In Soo Kim, Baig Gyu Choi… in Metallurgical and Materials Transactions A (2012)