Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy

S. Y. Yuan; Z. H. Jiang; J. Z. Liu; Y. Tang; Y. Zhang

doi:10.1080/21663831.2018.1538021

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Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy

Original Report | 更新时间：2026-08-19

- Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy
- Materials Research Letters Vol. 6, Issue 12, Pages: 683-688(2018)
- 作者机构：
  
  1. Herbert Gleiter Institute of Nanoscience School of Materials Science and Engineering Nanjing University of Science and Technology
  2. Shanghai Institute of Applied Mathematics and Mechanics Shanghai University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2018.1538021
  CLC：
- Online First：30 October 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
S. Y. Yuan, Z. H. Jiang, J. Z. Liu, et al. Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy[J]. Materials Research Letters, 2018, 6(12): 683-688.
DOI：

S. Y. Yuan, Z. H. Jiang, J. Z. Liu, et al. Nano-twinning in a γ′ precipitate strengthened Ni-based superalloy[J]. Materials Research Letters, 2018, 6(12): 683-688. DOI： 10.1080/21663831.2018.1538021.

摘要

Abstract

BSTRACTTwinning has been found to be a dominate mechanism in the γ′ precipitate strengthened Ni-based superalloys during service at intermediate temperatures. Here

high-resolution transmission electron microscopy and atomistic simulations have been combined to show that the twin nucleation process can be facilitated by Co replacing a fraction of Al in the γ′ precipitates

due to the negative binding energy of Co–Co atoms. The study further reveals that the presence of Co promotes a new twinning pathway featured with nucleation of one complex stacking fault (CSF) on the middle plane in between two separated CSFs.

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Related Author

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Shaoqiang Li

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Related Institution

a R&D Center Xi'an Sino-Euro Materials Technologies Co. Ltd.

b Instrumental Analysis Center Xi'an Jiaotong University

c National Key Laboratory of High-Efficiency Flexible Coal Power Generation and Carbon Capture Utilization and Storage China Huaneng Group Co. Ltd.

d Suzhou Laboratory

a Institute of Materials Henan Academy of Sciences Zhengzhou People’s Republic of China

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