Document Type

Journal Article

Publication Title

Materials and Design

Volume

198

Publisher

Elsevier

School

School of Engineering

RAS ID

32755

Funders

Funding information: https://www.sciencedirect.com/science/article/pii/S0264127520308583?via%3Dihub#ac0005

Comments

Liu, C., Xie, L., Qian, D., Hua, L., Wang, L., & Zhang, L. C. (2021). Microstructure evolution and mechanical property response of TC11 titanium alloy under electroshock treatment. Materials & Design, 198, article 109322. https://doi.org/10.1016/j.matdes.2020.109322

Abstract

© 2020 The Authors This work investigated the effects of electroshock treatment (EST) on the microstructure variation and mechanical properties of TC11 alloy. The average hardness of the specimens decreased from 358 HV to 328 HV after EST of 0.04 s, then increased to 396 HV after EST of 0.06 s. After EST, the yield strength of specimen declined from 959 MPa to 797 MPa after EST of 0.04 s, and then increased to 1265 MPa after EST of 0.06 s, but the fracture strain decreased continuously. The variation in mechanical properties was closely related to the phase transition from the secondary α (αs) to β phase, and the precipitation of refined needlelike α martensite (αM). The diffusion of atoms accompanied by broaden αs/β boundary from 11.2 nm to 27.6 nm due to the phase transformation after EST by 0.04 s and the dislocation pileup at the boundary to form defects, which resulted the decrease in strength. While increasing the EST time to 0.06 s, the width of αM/β boundary decreased to 5.91 nm. All results indicated that the EST is an effective method for optimizing the microstructure and mechanical properties of titanium alloys in a short time.

DOI

10.1016/j.matdes.2020.109322

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Research Themes

Natural and Built Environments

Priority Areas

Engineering, technology and nanotechnology

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