Work

Effect of high-temperature oxidation on mechanical properties of TC11 titanium alloy

Year: 2025

Type: article

Abstract: This study systematically investigates the synergistic effects of high-temperature oxidation and subsequent high-cycle fatigue behavior on TC11 titanium alloy (Ti-6.5Al-3.1Mo-1.05Zr-0.35Si, wt%). Comparative analysis shows that exposure to high-temperature oxidation (at 500 °C/10 h) induces a reduction in yield strength and a decrease in fatigue life. Microstructural characterization reveals a critical transition in fatigue failure mechanisms: pristine specimens exhibit conventional surface crack initiation with transgranular propagation, whereas oxidized counterparts develop brittle oxygen-enriched layers that trigger interfacial delamination and accelerated crack growth. The embrittled oxide/matrix interface serves as a preferential site for stress concentration, accounting for the observed increase in fatigue crack propagation rate. These findings provide mechanistic insights into the degradation pathways of titanium alloys under thermo-mechanical coupling conditions, providing guidance for durability assessment and fatigue-resistant design in high-temperature aerospace applications.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.04.071

Authors: Weiming Li, Zhijun Ma, Zhong Yang, Shaoqing Wang

Institution: Xi'an Technological University

Language: English

Topic: Titanium Alloys Microstructure and Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,640

Funders: Shaanxi Provincial Science and Technology Department, Key Research and Development Projects of Shaanxi Province