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Park, Myeongheom
Graduate School of Engineering, Division of Materials Science and Engineering Assistant Professor
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Last Updated :2026/08/20
Research
Research Topics, Overview of the research
Research Topics
Mechanical properties of metallic materials, Dual phase steels, heterogeneous deformation, local stress-strain analysis, elasto-plastic mechanicsOverview of the research
高強度・高延性の両立が構造材料において第一の目標であり、その実現のために様々な研究が従来から活発に成されていた。しかし強度と延性は一般的にトレードオフの関係にあり、両立は困難である。しかし、従来には破壊の起点となりうるため忌避していた介在物を積極的に利用することにより、強度・延性バランスが大きく改善されることが近年分かり始めている。本研究では材料の不均一さの定量化とともにマクロ・ミクロ不均一変形と力学特性の関係を明確にすることを目的とする。
Research Areas
Papers
- Role of twin boundary and martensitic transformation in strain partitioning and damage initiation in a metastable medium entropy alloyWujun Yin; Li Liang; Fabien Briffod; Si Gao; Myeong-heom Park; Jiyun Kang; Haoyu Hu; Takayuki Shiraiwa; Manabu Enoki; Nobuhiro TsujiActa Materialia, Aug. 2026
- Yttrium improves Mg ductility by enhancing grain-boundary strain compatibility: Mesoscopic deformation analysisMyeong-heom Park; Binxuan Sun; Saho Yako; Akinobu Shibata; Nobuhiro TsujiJournal of Materials Research and Technology, May 2026
- Dynamics of Portevin-Le Chatelier banding revealed through grain refinement in high-Mn austenitic steel: Sequential overcoming of neckingSukyoung Hwang; Myeong-heom Park; Yu Bai; Takumi Suzumura; Ryo Asada; Avala Lavakumar; Jesada Punyafu; Akinobu Shibata; Hiroki Adachi; Toshiyuki Fujii; Nobuhiro TsujiJournal of Materials Science & Technology, May 2026
- Origin of the trade-off relationship between tensile strength and hydrogen embrittlement resistanceKazuho Okada; Yukihisa Watase; Myeong-heom Park; Kaneaki Tsuzaki; Akinobu ShibataActa Materialia, Jan. 2026
- Grain size-dependent Lüders band dynamics in low-carbon steels: Combined insights from digital image correlation and in-situ synchrotron X-ray diffractionMyeong-heom Park; Si Gao; Nobuhiro TsujiMaterials Science and Engineering: A, Dec. 2025
- Compositional requirements for the synthesis of Fe–Mn–C austenite-martensite composites: Beyond local equilibrium considerations in pearlite formationMarcel Muench; Reza Gholizadeh; Myeong-heom Park; Nobuhiro Tsuji; Martin Peterlechner; Yolita M. Eggeler; Jan L. Riedel; Michael K. Eusterholz; Martin Heilmaier; Alexander KauffmannJournal of Materials Research and Technology, Nov. 2025
- Grain size effects on strain localization and fracture behavior in ferrite–martensite dual-phase steels characterized by digital image correlation analysisMyeong-heom Park; Yuichi Tagusari; Akinobu Shibata; Nobuhiro TsujiJournal of Materials Research and Technology, Jul. 2025
- Grain refinement of dual phase steel maximizes deformation ability of martensite, leading to simultaneous enhancement of strength and ductilityMyeong-heom Park; Akinobu Shibata; Stefanus Harjo; Nobuhiro TsujiActa Materialia, Jun. 2025
- Unusual deformation behavior and the consequent emergence of Type C serrations in Fe-1.6Mn-2Ni-1.4Si-0.4C steelsMyeong-heom Park; Sukyoung Hwang; Yoshitaka Okitsu; Nobuhiro TsujiScripta Materialia, Apr. 2025
- Polymer-like double necking deformation in an FeCoCrV medium entropy alloyMyeong-heom ParkMaterials Research Letters, 2025
- Loading-direction dependence of non-basal slip activity in a pre-twinned AZ31 magnesium alloyMyeong-heom ParkJournal of Alloys and Compounds, 2025
- Enhancing the precipitation hardening ability of Al-Mg-Ga-In-Sn alloy through low-temperature aging treatmentMyeong-heom ParkJournal of Alloys and Compounds, 2025
- Quantitative evaluation of local strain distribution induced by deformation twins and triggering effect of deformation twinning on neighboring grains in polycrystalline AZ31 magnesium alloysSaho Yako; Myeong-heom Park; Nobuhiro TsujiScripta Materialia, Jan. 2025
- Quantitative characterization of local deformation-fracture behavior in ferrite-martensite dual-phase steels with different martensite distributionsMyeong-heom Park; Ryota Matsubayashi; Akinobu Shibata; Nobuhiro TsujiMaterials Science and Engineering: A, Dec. 2024
- Effect of martensite hardness on mechanical properties and stress/strain-partitioning behavior in ferrite + martensite dual-phase steelsMyeong-heom Park; Yuto Fujimura; Akinobu Shibata; Nobuhiro TsujiMaterials Science and Engineering: A, Nov. 2024
- Making stress visible: A method to quantify local stress distribution in metals using digital image correlation methodMyeong-heom Park; Saho Yako; Yasunari Takeda; Akinobu Shibata; Nobuhiro TsujiScripta Materialia, Nov. 2024
- Strain localization behavior in a polycrystalline magnesium alloy with de-twinningJongbin Go; Myeong-heom Park; Si Gao; Nobuhiro TsujiScripta Materialia, Sep. 2024
- Real-time Observation of Stress-strain Behavior beyond Necking in Martensitic Steel by in-situ Synchrotron X-ray DiffractionMyeong-heom ParkISIJ International, 2024
- Mechanism of DSA effect correlating to the macroscopic PLC banding in high-Mn austenitic steelMyeong-heom ParkScripta Materialia, 2024
- Mechanism of simultaneous increase of strength and ductility with grain refinement in Si-added high-Mn austenitic steelMyeong-heom ParkMaterials Science and Engineering: A, 2024
- Cyclic transformation strengthening in Fe-24Ni-0.3C metastable austenitic steelMyeong-heom ParkProceedings of International Symposia on Steel Science, 2024
- Exploring unusual Lüders deformation in ultrafine-grained high-Mn austenitic steelMyeong-heom ParkMaterials Research Letters, 2024
- Effect of Zr micro-alloying on microstructure refinement and mechanical property of CoCrNi medium-entropy alloy processed by high-pressure torsion and subsequent annealingMyeong-heom ParkJournal of Materials Science, 2024
- Quantitatively evaluating respective contribution of austenite and deformation-induced martensite to flow stress, plastic strain, and strain hardening rate in tensile deformed TRIP steelWenqi Mao; Si Gao; Wu Gong; Yu Bai; Stefanus Harjo; Myeong-Heom Park; Akinobu Shibata; Nobuhiro TsujiActa Materialia, Sep. 2023
- Unique microstructure formations during low-temperature partitioning after intercritical annealing in low alloy multi-phase TRIP steel and their mechanical behavior clarified by in-situ synchrotron X-Ray diffractionAvala Lavakumar; Myeong-heom Park; Reza Gholizadeh; Ranjit Kumar Ray; Mitsuhiro Murayama; Nobuhiro TsujiMaterials Science and Engineering: A, Jun. 2023
- Mechanisms of types B and C serrations in the tensile flow curve of C-bearing high Mn steelSeon-Keun Oh; Myeong-heom Park; Young-Kook LeeJournal of Materials Research and Technology, May 2023
- Role of surrounding phases on deformation-induced martensitic transformation of retained austenite in multi-phase TRIP steelAvala Lavakumar; Myeong-heom Park; Sukyoung Hwang; Hiroki Adachi; Masugu Sato; Ranjit Kumar Ray; Mitsuhiro Murayama; Nobuhiro TsujiMaterials Science and Engineering: A, May 2023
- Characterization of local deformation and fracture behavior in ferrite + martensite dual-phase steels having different grain sizesM H Park; Y Tagusari; N TsujiIOP Conference Series: Materials Science and Engineering, 01 Jul. 2022
- Effective grain size refinement of an Fe-24Ni-0.3C metastable austenitic steel by a modified two-step cold rolling and annealing process utilizing the deformation-induced martensitic transformation and its reverse transformationWenqi Mao; Si Gao; Yu Bai; Myeong-heom Park; Akinobu Shibata; Nobuhiro TsujiJournal of Materials Research and Technology, Mar. 2022
- Unique transition of yielding mechanism and unexpected activation of deformation twinning in ultrafine grained Fe-31Mn-3Al-3Si alloyYu Bai; Hiroki Kitamura; Si Gao; Yanzhong Tian; Nokeun Park; Myeong-heom Park; Hiroki Adachi; Akinobu Shibata; Masugu Sato; Mitsuhiro Murayama; Nobuhiro TsujiScientific Reports, 05 Aug. 2021
- Effects of local stress, strain, and hydrogen content on hydrogen-related fracture behavior in low-carbon martensitic steelAkinobu Shibata; Takashi Yonemura; Yuji Momotani; Myeong-heom Park; Shusaku Takagi; Yazid Madi; Jacques Besson; Nobuhiro TsujiActa Materialia, May 2021
- The mechanism of dynamic strain aging for type A serrations in tensile curves of a medium-Mn steelJae-Hoon Nam; Seon-Keun Oh; Myeong-heom Park; Young-Kook LeeActa Materialia, Mar. 2021
- Mesoscopic nature of serration behavior in high-Mn austenitic steelSukyoung Hwang; Myeong-heom Park; Yu Bai; Akinobu Shibata; Wenqi Mao; Hiroki Adachi; Masugu Sato; Nobuhiro TsujiActa Materialia, Feb. 2021
- Tensile Deformation of Ultrafine-Grained Fe-Mn-Al-Ni-C Alloy Studied by In Situ Synchrotron Radiation X-ray DiffractionSi Gao; Takuma Yoshimura; Wenqi Mao; Yu Bai; Wu Gong; Myeong-heom Park; Akinobu Shibata; Hiroki Adachi; Masugu Sato; Nobuhiro TsujiCrystals, 07 Dec. 2020
- Challenging Ultra Grain Refinement of Ferrite in Low-C Steel Only by Heat TreatmentMyeong-heom Park; Akinobu Shibata; Nobuhiro TsujiFrontiers in Materials, 26 Nov. 2020
- Linking local and heterogeneous deformation behavior to global deformation of materials by in-situ experimental techniquesNobuhiro Tsuji; Myeong-heom Park; Si Gao; Yu Bai; Yan ChongIOP Conference Series: Materials Science and Engineering, 01 Aug. 2019
- In-situ neutron diffraction study on the deformation of a TRIP-assisted multi-phase steel composed of ferrite, austenite and martensiteA Lavakumar; M H Park; S Gao; A Shibata; Y Okitsu; W Gong; S Harjo; N TsujiIOP Conference Series: Materials Science and Engineering, 01 Aug. 2019
- Factors determining room temperature mechanical properties of bimodal microstructures in Ti-6Al-4V alloyYan Chong; Tilak Bhattacharjee; Myeong-Heom Park; Akinobu Shibata; Nobuhiro TsujiMaterials Science and Engineering: A, Jul. 2018
- Reason for high strength and good ductility in dual phase steels composed of soft ferrite and hard martensiteDaisuke Terada; Gosuke Ikeda; Myeong-heom Park; Akinobu Shibata; Nobuhiro TsujiIOP Conference Series: Materials Science and Engineering, Jul. 2017
- Post-uniform elongation and tensile fracture mechanisms of Fe-18Mn-0.6C-xAl twinning-induced plasticity steelsHa-Young Yu; Sang-Min Lee; Jae-Hoon Nam; Seung-Joon Lee; Damien Fabrègue; Myeong-heom Park; Nobuhiro Tsuji; Young-Kook LeeActa Materialia, Jun. 2017
- Cold-rolling and recrystallization textures of a nano-lamellar AlCoCrFeNi2.1 eutectic high entropy alloyI.S. Wani; T. Bhattacharjee; S. Sheikh; I.T. Clark; M.H. Park; T. Okawa; S. Guo; P.P. Bhattacharjee; N. TsujiIntermetallics, May 2017
- Enhanced strength-ductility balance of AZ31 Mg alloy through single-pass hot-rolling and subsequent low-temperature annealingJongbin Go; Saho Yako; Myeong-heom Park; Si Gao; Sangwon Lee; Reza Gholizadeh; Nobuhiro TsujiMATERIALS LETTERS, 15 Jul. 2026
- Role of Detwinning on Macroscopic Strain Localization in Magnesium AlloyJongbin Go; Myeong-heom Park; Si Gao; Saho Yako; Nobuhiro TsujiMetallurgical and Materials Transactions A, 20 Jul. 2025
External funds: Kakenhi
- Characterization of macro- and micro-deformation behavior in the materials with heterogeneous deformationGrant-in-Aid for Early-Career ScientistsBasic Section 18010:Mechanics of materials and materials-relatedKyoto UniversityMyeong-heom ParkFrom 01 Apr. 2020, To 31 Mar. 2024, Project Closed不均一変形;局所変形;ひずみ解析;デジタル画像相関法;局所応力;弾性ひずみ;複相組織;塑性変形;応力可視化;金属材料;力学特性;画像相関法;変形;構造材料;応力
- in-situ 3D transmission electron microscopy toward quantitative deformation structure characterizationGrant-in-Aid for Scientific Research (B)Basic Section 18010:Mechanics of materials and materials-relatedKyushu UniversityMitsuhiro MURAYAMAFrom 01 Apr. 2019, To 31 Mar. 2022, Project Closedナノスケール計測・解析;構造用金属材料;透過型電子顕微鏡法;その場観察;実用金属材料の塑性変形;TEM中その場観察;三次元観察;転位;積層欠陥;電子顕微鏡中その場観察;微細組織解析;塑性変形挙動;透過電子顕微鏡;塑性変形ダイナミクス;破断ダイナミクス
- Structural Metallic Materials Managing Ultra High Strength and Large Ductility by Hig h-Order Control of Deformation: Fostering Young Researchers with Dual-Sword Skills of Experiments and ComputationFund for the Promotion of Joint International Research (International Leading Research )Science and EngineeringKyoto University辻 伸泰From 17 Nov. 2023, To 31 Mar. 2030, Granted超高強度と高延性両立;金属材料;変形モード制御;加工硬化;原子シミュレーション;力学;国際共同研究;若手人材育成;超高強度;計算実験の二刀流;延性・靱性
- 複相組織材における局所内部応力測定手法の確立と結晶粒微細化強化機構の解明Grant-in-Aid for Scientific Research (C)Basic Section 18010:Mechanics of materials and materials-relatedKyoto University朴 明験From 01 Apr. 2024, To 31 Mar. 2028, Granted塑性変形;不均一変形;デジタル画像相関法;応力可視化;局所応力;画像相関法;残留応力
