Microstructure, mechanical properties at room temperature and high temperature of TC17 titanium alloy fabricated by laser powder bed fusion

IF 7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-09-18 DOI:10.1016/j.msea.2025.149143

Zhiyang Kong , Tongsheng Deng , Hao Zhang , Yongjian Zheng , Zixiang Qiu , Qizhong Huang , Haixuan wang , Yang Yang , Yaoyao Ding , Liwen Liang , Shimin Fang , Miaocheng Tian , Chaoyue Tang , Roman Mishnev

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引用次数: 0

Abstract

This study investigates the influence of annealing, solution treatment, and aging heat treatment on the room-temperature and high-temperature tensile strength of TC17 alloy fabricated by laser powder bed fusion (LPBF). The TC17 alloy prepared by LPBF predominantly exhibits α lamellae in both the solution-treated and aged states. The optimization of alloy strength is achieved by inducing the precipitation of the secondary α phase. Analysis of room-temperature tensile properties identifies 910 °C as the optimal annealing temperature. Under the final heat treatment regime of 910 °C/1h/AC (air cooling) + 800 °C/1h/WQ (water quenching) + 630 °C/4h/AC, the room-temperature strength of the alloy increases by 35.9 % compared to the as-deposited state. At 400 °C, the high-temperature tensile ductility of the TC17 alloy samples fabricated by LPBF increased by 73 % compared to the standard, while maintaining the required tensile strength, thereby optimizing their mechanical properties.

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激光粉末床熔合制备TC17钛合金的显微组织及室温和高温力学性能

研究了退火、固溶和时效热处理对激光粉末床熔合TC17合金室温和高温拉伸强度的影响。LPBF制备的TC17合金在固溶态和时效态均以α片层为主。合金强度的优化是通过诱导次生α相的析出来实现的。室温拉伸性能分析确定910℃为最佳退火温度。在910°C/1h/AC（空冷）+ 800°C/1h/WQ（水淬）+ 630°C/4h/AC的最终热处理条件下，合金的室温强度比沉积态提高了35.9%。在400℃时，LPBF制备的TC17合金样品的高温拉伸延展性比标准样品提高了73%，同时保持了所需的拉伸强度，从而优化了其力学性能。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.