Transactions of Materials and Heat Treatment

Title：Influence of annealing temperature on microstructure and properties for TC4ELI titanium alloy plate

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ClassificationCode：TG335.4

year,vol(issue):pagenumber：2025,50(8):268-294

Abstract：

The influences of different annealing temperatures (760-1000 ℃) on the microstructure and mechanical properties of large-sized TC4ELI titanium alloy plates for marine applications were investigated. Through room temperature tensile test, room temperature impact test, -20 ℃ impact test and microstructure analysis of specimens subjected to conventional annealing, the correlation of annealing temperature with microstructure and properties was explored. The test results show that within the range of 760-960 ℃, the tensile strength and yield strength of the plates change slightly, while the plasticity and impact toughness remain relatively stable. However, when the annealing temperature increases to 1000 ℃, although the strength and impact toughness of the plates show no significant changes, the plasticity decreases markedly. Microstructure analysis reveals that as the annealing temperature increases, the content of β phase gradually increases, while the content of primary α phase correspondingly decreases, which is almost completely dissolved at 1000 ℃. The study results provide a theoretical basis for optimizing the heat treatment process of TC4ELI titanium alloy plates and have guiding significance for their application in the marine field.

Funds：

海洋工程用TC4ELI钛合金板材、锻件研制（XR/KY-ZY-25001）

作者简介：贾云云(1993-)，男，学士，助理工程师 E-mail：JYY18153961205@163.com 通信作者：周雪红（1994-），女，学士，助理工程师 E-mail：18220196913@163.com

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