Abstract Linear friction welding (LFW) is a solid-state joining process that is an established technology for the fabrication of titanium alloy bladed disks (blisks) in aero-engines. Owing to the economic benefits, LFW has been identified as a technology capable of manufacturing Ti-6Al-4V aircraft structural components. However, LFW of Ti-6Al-4V has seen limited industrial implementation outside of blisk manufacture, which is partly due to the knowledge and benefits of the process being widely unknown. This article provides a review of the published works up-to-date on the subject to identify the “state-of-the-art”. First, the background, fundamentals, advantages and industrial applications of the process are described. This is followed by a description of the microstructure, mechanical properties, flash morphology, interface contaminant removal, residual stresses and energy usage of Ti-6Al-4V linear friction welds. A brief discussion on the machine tooling effects is also included. Next, the work on analytical and numerical modelling is discussed. Finally, the conclusions of the review are presented, which include practical implications for the manufacturing sector and recommendations for further research and development. The purpose of this article is to inform industry and academia of the benefits of LFW so that the process may be better exploited.

中文翻译：

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Ti-6Al-4V线性摩擦焊文献综述

摘要 线性摩擦焊接 (LFW) 是一种固态连接工艺，是制造航空发动机钛合金叶片盘（叶盘）的成熟技术。由于经济效益，LFW 已被确定为能够制造 Ti-6Al-4V 飞机结构部件的技术。然而，Ti-6Al-4V 的 LFW 在叶盘制造之外的工业实施有限，部分原因是该过程的知识和好处广为人知。本文回顾了有关该主题的最新已发表作品，以确定“最新技术”。首先，描述了该工艺的背景、基本原理、优势和工业应用。接下来是对微观结构、机械性能、飞边形态、界面污染物去除、Ti-6Al-4V 线性摩擦焊缝的残余应力和能量使用。还包括对机床加工效果的简要讨论。接下来，将讨论分析和数值建模方面的工作。最后，提出了审查的结论，其中包括对制造业的实际影响以及对进一步研究和开发的建议。本文的目的是让工业界和学术界了解 LFW 的好处，以便更好地利用该过程。其中包括对制造业的实际影响以及对进一步研究和开发的建议。本文的目的是让工业界和学术界了解 LFW 的好处，以便更好地利用该过程。其中包括对制造业的实际影响以及对进一步研究和开发的建议。本文的目的是让工业界和学术界了解 LFW 的好处，以便更好地利用该过程。