Evaluation of microstructure and mechanical properties of annealed SLMed Ti–6Al–4V alloy using laser ultrasonics

作者：Jiazheng Jiang, Yaoxin Huang, Anmin Yin, Yeqing He, Xiaodong Xu, Xuejun Yan, Ying Wang, Tingxiao Tang · 发表于：Journal of Materials Research and Technology · 年份：2025 · DOI：10.1016/j.jmrt.2025.05.241 · 被引用次数：7 · 研究领域：Titanium Alloys Microstructure and Properties、Additive Manufacturing Materials and Processes、Advanced Welding Techniques Analysis

This paper investigates the relationship between the microstructure of annealed SLM Ti-6Al-4V alloy and ultrasonic eigenvalues. It proposes a mechanism for the interaction between the titanium alloy's microstructure and laser ultrasonic waves. Building on the enhanced Hall-Petch relationship that correlates grain size with mechanical properties, we establish and validate calculation models for yield strength, tensile strength, and hardness based on the ultrasonic time-domain attenuation coefficient, using experimental data for verification. The results indicate that the accuracy of the models linking microstructure and mechanical properties to ultrasonic eigenvalues is approximately 0.85.