Details of the Researcher

PHOTO

Yan Jingyuan
Section
Advanced Institute for Materials Research
Job title
Assistant Professor
Degree

  • PhD (Engineering) (The University of Tokyo)

  • Master (Engineering) (Zhejinag University)

  • Bachelar (Engineering) (Central South University)

e-Rad No.
11030718

Research History 4

  • 2025/10 - Present
    Tohoku University　Advanced Institute for Materials Research　Assistant Professor

  • 2024/04 - 2025/09
    The University of Tokyo　Institute of Engineering Innovation　Project Researcher

  • 2022/05 - 2024/03
    The University of Tokyo　Research Assistant

  • 2020/10 - 2022/04
    Peking University　Research Assistant

Education 3

  • The University of Tokyo　The Graduate School of Engineering　Material Engineering

    2020/10 - 2024/03

  • Zhejiang University　School of Material Science and Engineering　Material Science and Engineering

    2017/09 - 2020/03

  • Central South University　School of Metallurgy and Environment　New Energy Materials and Devices

    2013/09 - 2017/06

Papers 4

  1. Atomic‐Scale Insights into Yttrium‐Induced Grain Boundary Structure Modification in Al2O3

    Jingyuan Yan, Tatsuya Yokoi, Yuuki Nakano, Shun Kondo, Bin Feng, Naoya Shibata, Katsuyuki Matsunaga, Yuichi Ikuhara

    Advanced Science　2025/12/22

    DOI： 10.1002/advs.202515350 　

  2. Nanoscale Localized Phonons at Al2O3 Grain Boundaries Peer-reviewed

    Jingyuan Yan, Ruochen Shi, Jiake Wei, Yuehui Li, Ruishi Qi, Mei Wu, Xiaomei Li, Bin Feng, Peng Gao, Naoya Shibata, Yuichi Ikuhara

    Nano Letters　2024/03/20

    DOI： 10.1021/acs.nanolett.3c04149 　

  3. Atomistic Investigation of Grain Boundary Fracture in Alumina Peer-reviewed

    Jingyuan Yan, Shun Kondo, Bin Feng, Naoya Shibata, Yuichi Ikuhara

    Nano Letters　2024/03/13

    DOI： 10.1021/acs.nanolett.3c04875 　

  4. Anomalous size effect on yield strength enabled by compositional heterogeneity in high-entropy alloy nanoparticles Peer-reviewed

    Jingyuan Yan, Sheng Yin, Mark Asta, Robert O. Ritchie, Jun Ding, Qian Yu

    Nature Communications　13　(1)　2022/05/19

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41467-022-30524-z 　

    eISSN： 2041-1723

    More details Close

    Abstract High-entropy alloys (HEAs), although often presumed to be random solid solutions, have recently been shown to display nanometer-scale variations in the arrangements of their multiple chemical elements. Here, we study the effects of this compositional heterogeneity in HEAs on their mechanical properties using in situ compression testing in the transmission electron microscope (TEM), combined with molecular dynamics simulations. We report an anomalous size effect on the yield strength in HEAs, arising from such compositional heterogeneity. By progressively reducing the sample size, HEAs initially display the classical “smaller-is-stronger” phenomenon, similar to pure metals and conventional alloys. However, as the sample size is decreased below a critical characteristic length (~180 nm), influenced by the size-scale of compositional heterogeneity, a transition from homogeneous deformation to a heterogeneous distribution of planar slip is observed, coupled with an anomalous “smaller-is-weaker” size effect. Atomic-scale computational modeling shows these observations arise due to compositional fluctuations over a few nanometers. These results demonstrate the efficacy of influencing mechanical properties in HEAs through control of local compositional variations at the nanoscale.