Transactions of Materials and Heat Treatment

Title：Hot deformation characteristics and modeling of diffusion bonding TC4 titanium alloy

Authors：

Unit：

KeyWords：

ClassificationCode：TG146.23

year,vol(issue):pagenumber：2024,49(7):264-272

Abstract：

The hot tensile tests of diffusion bonding (DB) TC4 titanium alloy specimen were carried out at the deformation temperature of 750-850 ℃ and the strain rate of 0.0001-0.1 s-1, and the stress-strain curves were obtained to research the hot tensile deformation behaviour and mechanism of diffusion bonding TC4 titanium alloy specimen. Then, an unified constitutive model based on internal variables for diffusion bonding TC4 titanium alloy was established, which described the relationship between internal variables such as phase transformation, dislocation density, recrystallization behaviour, and damage and stress in diffusion bonding TC4 titanium alloy. Based on the test data, the model parameters were calibrated by genetic algorithm(GA), which could predict the hot deformation behaviour of diffusion bonding titanium alloys at multiple temperatures and strain rates and provide a theoretical basis and model for accurately simulating the hot forming of diffusion bonding titanium alloys.

Funds：

国家自然科学基金资助项目（52005020）；中央高校基本科研业务基金（YWF-23-L-1012）

作者简介：蔡钟满（1994-），男，博士研究生 E-mail：czm@buaa.edu.cn 通信作者：李勇（1989-），男，博士，教授 E-mail：liyong19@buaa.edu.cn

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