High entropy component-induced nanoscale shear banding and twinning enhance Ti6Al4V alloy surface properties

Deyu Jiang; Yingchen Wang; Binghao Wang; Xiaoli Ma; Yintao Zhang; Vladimir Uglov; Weijie Lu; Chengliang Yang; Liqiang Wang

Journal of Materials Research and Technology (Sep 2024)

High entropy component-induced nanoscale shear banding and twinning enhance Ti6Al4V alloy surface properties

Deyu Jiang,
Yingchen Wang,
Binghao Wang,
Xiaoli Ma,
Yintao Zhang,
Vladimir Uglov,
Weijie Lu,
Chengliang Yang,
Liqiang Wang

Affiliations

Deyu Jiang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Yingchen Wang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Binghao Wang: Guangxi Key Laboratory of Basic and Translational Research of Bone and Joint Degenerative Diseases, Guangxi Biomedical Materials Engineering Research Center for Bone and Joint Degenerative Diseases, Affiliated Hospital of Youjiang Medical University for Nationalities, NO.18, Zhongshan 2nd Road, Baise, Guangxi, 533000, China
Xiaoli Ma: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Yintao Zhang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Vladimir Uglov: Belarusian State University, Minsk, 220030, Belarus
Weijie Lu: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
Chengliang Yang: Guangxi Key Laboratory of Basic and Translational Research of Bone and Joint Degenerative Diseases, Guangxi Biomedical Materials Engineering Research Center for Bone and Joint Degenerative Diseases, Affiliated Hospital of Youjiang Medical University for Nationalities, NO.18, Zhongshan 2nd Road, Baise, Guangxi, 533000, China; Corresponding author.
Liqiang Wang: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Corresponding author.

Journal volume & issue: Vol. 32
pp. 1062 – 1073

Abstract

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High-entropy alloys (HEAs) present unique advantages in surface modification due to their stable mixed-state structures and resistance to intermetallic compound formation. This study investigates the surface modification behavior of equiatomic TiNbHfZnZr HEA components in Ti6Al4V alloy using friction stir processing (FSP). The aim is to enhance the mechanical properties and structural stability of Ti6Al4V by incorporating HEA elements. It was found that the introduction of high-entropy alloys forms shear bands with distinctive micro and nano gradient structures on the surface of the Ti6Al4V alloy. These shear bands not only significantly refine the grains but also promote β phase and β twin formation. The HEA-induced shear bands enhance the strength and stability of the alloy by creating bcc twins and dislocation networks that suppress martensitic transformation and maintain superelasticity. Concurrently, the introduction of HEA components leads to the formation of stable dual-phase (α + bcc) microstructures within the α matrix, significantly improving hardness and modulus.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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