Title: Analysis of stress corrosion behaviour of TC4 titanium alloy in simulated seawater environment

Authors: Zipan Chen; Beibei Guo; Huixian Zhang

Addresses: School of Mechanical Engineering, Tongling University, 1335, Cuihu four Road, Tongling, 244061, China ' School of Mechanical Engineering, Tongling University, 1335, Cuihu four Road, Tongling, 244061, China ' China NCS Testing Technology Co., Ltd., Beijing, 10008, China

Abstract: Seawater has a certain degree of corrosiveness to metal materials. In order to understand the stress corrosion behaviour of TC4 titanium alloy in marine environment, the stress corrosion performance of TC4 titanium alloy in simulated seawater environment was studied. The stress corrosion performance of TC4 titanium alloy specimens under different strain rates is tested, and the stress corrosion performance of TC4 titanium alloy specimens under dual state and Weinstein structures are analysed. Test results show that the stress corrosion sensitivity index is the highest at a strain rate of 5.510^-6/s, indicating that the stress corrosion of TC4 titanium alloy in simulated seawater environment is more severe than that of TC4 titanium alloy in ordinary air. The stress corrosion threshold values of the bimodal structure and the Weinstein structure of the TC4 titanium alloy specimen are 57.12 MPa * m^1/2 and 68.59 MPa * m^1/2, respectively, indicating that the Weinstein structure has a higher stress corrosion strength.

Keywords: simulated seawater; TC4 titanium alloy; stress corrosion; sensitivity index; bimodal organisation; widmanstatten.

DOI: 10.1504/IJMMP.2024.137974

International Journal of Microstructure and Materials Properties, 2024 Vol.17 No.2/3, pp.134 - 150

Received: 27 Jun 2023
Accepted: 08 Nov 2023
Published online: 15 Apr 2024 *

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