Diffusion bonding of TC4/TB8 titanium alloys with an interlayer by regulating temperature: Microstructure and mechanical performance

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-11-26 DOI:10.1016/j.tws.2024.112760

Tianle Li , Renhao Wu , Man Jae SaGong , Zaigham Saeed Toor , Hyoung Seop Kim

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引用次数: 0

Abstract

Diffusion bonding of α+β type TC4 (Ti-6Al-4V) and metastable β type TB8 (Ti-15Mo-2.7Nb-3Al-0.2Si) alloys with interlayer addition was systematically investigated by regulating temperature, revealing the discrepancies in interfacial microstructure and mechanical performance of the joints. Microstructural evolution at the TC4/Ti interfaces and TB8/Ti interfaces can be attributed to atomic interdiffusion and α/β transformation depending on temperature. Additionally, 7 of the 12 α variants that comply with the Burgers orientation relationship with β parents at the transitional layer are identified. The elongation of the bonded samples upon the tensile direction perpendicular to the interfaces becomes decreased compared to that of samples subjected to the tensile direction parallel to the interfaces. The dislocation characteristics and fracture models are analyzed after plastic deformation. This study indicates that a two-step method (first high-temperature and short-duration, then low-temperature and long-duration) can optimize the microstructure and mechanical performance of joints for Ti alloys exposed to high temperatures.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.