Surface Mechanical Attrition Treatment-Induced Dissolution of Cu4Ti Precipitates in Cu—4wt-%Ti Alloy

Abstract

The microstructural evolution of an overaged Cu-4wt-%Ti alloy associated with surface mechanical attrition treatment (SMAT) has been studied by X-ray diffraction, scanning electron microscope and transmission electron microscopy. The results show that β-Cu4Ti precipitates in the topmost surface layer were dissolved after SMAT, and Cu solid solution phase with a fine grain size of approximately 25 nm was observed. Dislocation activities were the main deformation mechanism of lamellar structure in the overaged Cu-4wt-%Ti alloy. The twinning in lamellar Cu phase was inhibited by the β-Cu4Ti precipitates.

Department(s)

Materials Science and Engineering

Comments

This work was supported by the National Natural Science Foundation of China [grant number 51374151], Higher Education Technology Innovation Project in Shanxi Province [grant number 2019L0170].

Keywords and Phrases

Aging Treatment; Dislocation Activities; Dissolution; Surface Mechanical Attrition Treatment; β-Cu4Ti Precipitates

International Standard Serial Number (ISSN)

0267-0836; 1743-2847

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2020 Institute of Materials, Minerals and Mining, All rights reserved.

Publication Date

01 Apr 2020

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