Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys

Pengfei Qu; Wenchao Yang; Qiang Wang; Chen Liu; Jiarun Qin; Jun Zhang; Lin Liu

doi:10.1080/21663831.2024.2396044

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Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys

Original Report | 更新时间：2026-08-19

- Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys
- Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys
- 材料研究快报（英文） 2024年12卷第11期页码：860-868
- 作者机构：
  
  State Key Laboratory of Solidification Processing Northwestern Polytechnical University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2024.2396044
  中图分类号：
- 网络首发：2024-08-26，
  
  纸质出版：2024
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Pengfei Qu, Wenchao Yang, Qiang Wang, 等. Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys[J]. 材料研究快报（英文）, 2024,12(11):860-868.

Pengfei Qu, Wenchao Yang, Qiang Wang, et al. Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys[J]. Materials Research Letters, 2024, 12(11): 860-868.
Pengfei Qu, Wenchao Yang, Qiang Wang, 等. Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys[J]. 材料研究快报（英文）, 2024,12(11):860-868. DOI： 10.1080/21663831.2024.2396044.

Pengfei Qu, Wenchao Yang, Qiang Wang, et al. Microtwinning mechanism revealed by its orientation dependence and tension-compression asymmetry in γ′ precipitate-strengthened Ni-based superalloys[J]. Materials Research Letters, 2024, 12(11): 860-868. DOI： 10.1080/21663831.2024.2396044.

摘要

Abstract

Microtwinning is observed as an important mechanism in γ′ precipitate-strengthened Ni-based superalloys during service at intermediate temperatures. Here

the effect of crystal orientation and stress direction on microtwinning was investigated. The result indicates that the formation of microtwins exhibits orientation dependence and tension-compression asymmetry. Based on the analysis of slip and twinning competition behavior under different conditions

it is deemed that the a/2〈110〉 matrix dislocations would dissociate into a/6〈112〉 Shockley partials in the γ matrix and then a Shockley partial sheared γ’ phase and formed microtwins.

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