Enhanced thermostability via dislocation-assisted heterogeneous co-precipitation in Cu-Cr-Hf alloy

Release time:2026-09-11

Impact Factor:16.8

DOI number:10.1016/j.jmst.2025.04.040

Affiliation of Author(s):中南大学材料科学与工程学院

Journal:Journal of Materials Science & Technology

Key Words:Copper alloy

Abstract:Over-aging softening due to second-phase particle coarsening is a prevalent issue in age-hardenable copper alloys, limiting their performance optimization and high-temperature applications. We propose a dislocation-assisted heterogeneous co-precipitation strategy for high thermal stability in Cu-Cr-Hf alloys, leveraging the dislocation sensitivity of Hf phase nucleation as a key element of this approach. Through this, we explore their precipitation behavior and observe two novel co-precipitation modes.

Co-author:Li Linhan, Pang Yong, Ren Kalubi, Li Ying, Zhang Chaomin, Yi Jiang, Li Zhou

First Author:Jia Yanlin

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Volume:244

Page Number:88-101

ISSN No.:1005-0302

Translation or Not:no

Date of Publication:2026-02-01