This special issue of Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering (JPME) contains selected papers presented at the 1st International Conference on Advanced Joining Processes 2019 (AJP 2019). AJP 2019 was chaired by Lucas FM da Silva (University of Porto, Portugal), Paulo Martins (University of Lisbon, Portugal), Mohamad El-Zein (John Deere, USA) and Uwe Reisgen (RWTH Aachen University). It was held in Ponta Delgada, Azores (Portugal) during 24–25 October 2019. The chairmen of AJP 2019 conference would like to thank the German scientific society for joining (WGF) for supporting the conference. The goal of the conference was to provide a unique opportunity to exchange information, present the latest results as well as to discuss issues relevant to advanced joining processes. The following aspects were treated: process optimization in experimental and simulation terms, metallurgical and material behavior associated with joining, engineering properties and assessment of joints, health and safety aspects of joining, durability of joints in service, industrial applications and education. Approximately 160 papers were presented by researchers from nearly 22 countries.

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本期《机械工程师学会学报》 E期：《过程机械工程杂志》（JPME）包含在2019年第一届高级连接过程国际会议（AJP 2019）上发表的精选论文。AJP 2019由Lucas FM da Silva（葡萄牙波尔图大学），Paulo Martins（葡萄牙里斯本大学），Mohamad El-Zein（美国约翰迪尔大学）和Uwe Reisgen（亚琛工业大学）担任主席。该会议于2019年10月24日至25日在亚速尔群岛（葡萄牙）的蓬塔德尔加达举行。AJP 2019会议的主席要感谢德国科学学会对（WGF）的支持。会议的目的是为交流信息，提供最新成果以及讨论与高级加入流程相关的问题提供独特的机会。处理了以下方面：实验和仿真方面的过程优化，与接头相关的冶金和材料性能，接头的工程特性和评估，接头的健康和安全性，接头在服务，工业应用和教育方面的耐久性。来自近22个国家的研究人员发表了约160篇论文。