Interfacial intermetallic compounds formation at interface for joining selective laser melted and wrought Ti6Al4V alloy

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2025-09-12 DOI:10.1016/j.intermet.2025.109000

Morteza Azarbarmas

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引用次数: 0

Abstract

Taking advantage of both selective laser melted and wrought samples, joining them together is extremely interesting. In this study, specimens of selective laser melted and wrought Ti6Al4V alloy were diffusion bonded using Cu interlayer, as a first attempt, to evaluate the influence of bonding parameters on microstructural developments and the performance of joints. The diffusion bonding was accomplished using a simply designed fixture, with the industrial applicability, at 820, 850 and 870 °C, with a holding time of 2 h. Obtained joints were studied by scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), X-ray diffractometry (XRD), micro-hardness measurement and shear strength test. The observation of microstructures showed that sound joints comprising several intermetallics can be formed by this method. The shear strength of about 125 MPa was obtained during bonding at 850 °C, in which diffusion layers comprising several intermetallic compounds - Ti₂Cu, TiCu, Ti₃Cu₄ and TiCu₂ - were detected inside the interface of joints.

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选择性激光熔化变形Ti6Al4V合金连接界面金属间化合物的形成

利用选择性激光熔化和锻造样品，将它们连接在一起是非常有趣的。本研究首次采用Cu中间层对选择性激光熔化和变形Ti6Al4V合金试样进行扩散连接，以评估连接参数对接头组织发展和性能的影响。在820、850和870℃、保温时间为2 h的条件下，采用简单设计的工业适用夹具完成了扩散连接。采用扫描电镜（SEM）、能谱仪（EDS）、x射线衍射仪（XRD）、显微硬度测量和抗剪强度测试对得到的接头进行了研究。显微组织观察表明，该方法可形成由多种金属间化合物组成的良好接头。850℃下，合金的抗剪强度约为125 MPa，接头界面内存在由Ti2Cu、TiCu、Ti3Cu4和TiCu2等金属间化合物组成的扩散层。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.