In situ TEM study of the thermal stability of nanotwinned Ni-Mo-W alloys

Mo-Rigen He; Ruopeng Zhang; Rohan Dhall; Andrew M. Minor; Kevin J. Hemker

doi:10.1080/21663831.2023.2255321

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In situ TEM study of the thermal stability of nanotwinned Ni-Mo-W alloys

Original Reports | 更新时间：2026-08-19

- In situ TEM study of the thermal stability of nanotwinned Ni-Mo-W alloys
- Materials Research Letters Vol. 11, Issue 10, Pages: 879-887(2023)
- 作者机构：
  
  1. a Department of Mechanical Engineering Johns Hopkins University Baltimore
  2. b Department of Materials Science & Engineering University of California Berkeley CA USA
  3. c National Center for Electron Microscopy (NCEM) Lawrence Berkeley National Laboratory Berkeley
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2023.2255321
  CLC：
- Online First：11 September 2023，
  
  Published：2023
- 稿件说明：
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Mo-Rigen He, Ruopeng Zhang, Rohan Dhall, et al. In situ TEM study of the thermal stability of nanotwinned Ni-Mo-W alloys[J]. Materials Research Letters, 2023, 11(10): 879-887.
DOI：

Mo-Rigen He, Ruopeng Zhang, Rohan Dhall, et al. In situ TEM study of the thermal stability of nanotwinned Ni-Mo-W alloys[J]. Materials Research Letters, 2023, 11(10): 879-887. DOI： 10.1080/21663831.2023.2255321.

摘要

Abstract

Microstructural evolution in nanotwinned Ni-Mo-W alloys under

in situ

heating experiments is investigated in a transmission electron microscope. Migration of twin boundaries and grain boundaries as well as formation of carbide precipitates are observed at various temperatures and characterized at atomic resolution. These transformations are found to occur at temperatures that are ∼200°C lower in Mo-rich (Ni

) specimens than in W-rich (Ni

) specimens

which highlights the different efficacy of Mo and W solutes in stabilizing the nanotwinned structure. Inspection of various mechanisms points to the importance of elastic modulus mismatch as a pathway for enhancing nanotwin stability by alloying.

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Related Institution

a Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences

b School of Materials Science and Engineering University of Science and Technology of China

a Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang People’s Republic of China

b State Key Laboratory of High Performance Roll Materials and Composite Forming School of Material Science and Engineering Hebei University of Technology Tianjin People’s Republic of China

a State Key Laboratory of Metastable Materials Science and Technology & School of Materials Science and Engineering Yanshan University Qinhuangdao People’s Republic of China

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