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  1. No Access

    Article

    Heat-Affected Zone Characteristics with Post-Weld Heat Treatments in Austenitic Fe–Mn–Al–C Lightweight Steels

    This study investigates the relationship between the mechanical characteristics and microstructural transitions in heat-affected zone (HAZ) of various austenitic Fe–Mn–Al–C lightweight steels. The analysis was...

    Seonghoon Jeong, Gitae Park, Bongyoon Kim… in Metals and Materials International (2022)

  2. No Access

    Article

    Effects of Annealing on the Microstructure and Thermoelectric Properties of Half-Heusler MNiSn (M = Ti, Zr, Hf)

    Half-Heusler MNiSn (M = Ti, Zr, Hf) shows a good thermoelectric performance in a medium temperature range of 500–1100 K. In this study, we investigate the effect of annealing on the microstructure and thermoelect...

    Gitae Park, Ho Seong Lee, Seonghoon Yi in Journal of Electronic Materials (2022)

  3. No Access

    Article

    Kinetics Study on Low-Temperature Tempering of Martensitic Phase in Medium Mn Steel Weldment During Paint-Baking Heat Treatment

    The kinetics of low-temperature tempering in a dissimilar resistance spot weldment between medium Mn transformation-induced plasticity (MT) steel and dual-phase (DP) steel were investigated to interpret the ch...

    Gitae Park, Kwangjoong Kim, Youngchai Lee, Sangho Uhm… in Metals and Materials International (2022)

  4. No Access

    Article

    Fusion Weldabilities of Advanced High Manganese Steels: A Review

    A large amount of manganese has been added to next-generation advanced high strength steels for automotive applications. The increased manganese content changes the microstructural and mechanical characteristi...

    Gitae Park, Seonghoon Jeong, Changhee Lee in Metals and Materials International (2021)

  5. No Access

    Article

    Characterization of Mechanical and Metallurgical Notch Effects of DP980 Steel Weld Joints in Fatigue Performance

    This work investigates the use of 980 MPa grade dual-phase (DP) steel joints with pulsed current gas metal arc welding (P-GMAW) for reliable weld performance by comparing actual welded joints with thermo-mecha...

    Gitae Park, Gyuyeol Bae, Changhee Lee in Metallurgical and Materials Transactions A (2019)

  6. No Access

    Article

    Correlation Between Microstructure and Low-Temperature Impact Toughness of Simulated Reheated Zones in the Multi-pass Weld Metal of High-Strength Steel

    A large fraction of reheated weld metal is formed during multi-pass welding, which significantly affects the mechanical properties (especially toughness) of welded structures. In this study, the low-temperatur...

    Yongjoon Kang, Gitae Park, Seonghoon Jeong… in Metallurgical and Materials Transactions A (2018)