Stabilization of L12 structured Cr3Cu precipitates in a Cu-4.06Cr-1.25Nb alloy with high high-temperature strength

Y. H. Yang; Q. Lei; P. Zhang; W. Y. Wang; X. K. Zhang; Y. P. Li; K. C. Zhou; Z. Li

doi:10.1080/21663831.2022.2035838

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Stabilization of L12 structured Cr3Cu precipitates in a Cu-4.06Cr-1.25Nb alloy with high high-temperature strength

Original Reports | 更新时间：2026-08-19

- Stabilization of L12 structured Cr3Cu precipitates in a Cu-4.06Cr-1.25Nb alloy with high high-temperature strength
- Materials Research Letters Vol. 10, Issue 4, Pages: 257-263(2022)
- 作者机构：
  
  1. a State Key Laboratory for Powder Metallurgy Central South University
  2. b School of Materials Science and Engineering Central South University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2022.2035838
  CLC：
- Online First：18 February 2022，
  
  Published：2022
- 稿件说明：
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Y. H. Yang, Q. Lei, P. Zhang, et al. Stabilization of L12 structured Cr3Cu precipitates in a Cu-4.06Cr-1.25Nb alloy with high high-temperature strength[J]. Materials Research Letters, 2022, 10(4): 257-263.
DOI：

Y. H. Yang, Q. Lei, P. Zhang, et al. Stabilization of L12 structured Cr3Cu precipitates in a Cu-4.06Cr-1.25Nb alloy with high high-temperature strength[J]. Materials Research Letters, 2022, 10(4): 257-263. DOI： 10.1080/21663831.2022.2035838.

摘要

Abstract

Stable L1

structured Cr

Cu precipitates were determined in a Cu-4.06Cr-1.25Nb alloy rather than b.c.c. structured Cr precipitates by transmission electron microscope (TEM) and three-dimension atom probe tomography (3DAP) at 450

C. The precipitation sequence of the studied alloy aged at 400

C was supersaturated solid solution → f.c.c. Cr phase → Cr

Cu phase (L1

). Nb atoms would segregate in the interface between the Cu and Cr phase

reduce the Cu/Cr interfacial energy

affect the precipitation

growth

phase transformation

and coarsening of the precipitate. These Cr

Cu precipitates significantly improved the high-temperature strength of the Cu-Cr-Nb alloy (223 ± 5 MPa at 500

C).

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Related Institution

b State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and Engineering Hebei University of Technology Tianjin People’s Republic of China

b State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and Engineering Hebei University of Technology

a Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering Jilin University

c International Center of Future Science Jilin University

a Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering Jilin University Changchun People’s Republic of China

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