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