Revilla Reynier I, Verkens Donovan, Rubben Tim, De Graeve Iris
Research group of Electrochemical and Surface Engineering, Department of Materials and Chemistry (MACH), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
Materials (Basel). 2020 Oct 28;13(21):4804. doi: 10.3390/ma13214804.
Metal additive manufacturing (MAM), also known as metal 3D printing, is a rapidly growing industry based on the fabrication of complex metal parts with improved functionalities. During MAM, metal parts are produced in a layer by layer fashion using 3D computer-aided design models. The advantages of using this technology include the reduction of materials waste, high efficiency for small production runs, near net shape manufacturing, ease of change or revision of versions of a product, support of lattice structures, and rapid prototyping. Numerous metals and alloys can nowadays be processed by additive manufacturing techniques. Among them, Al-based alloys are of great interest in the automotive and aeronautic industry due to their relatively high strength and stiffness to weight ratio, good wear and corrosion resistance, and recycling potential. The special conditions associated with the MAM processes are known to produce in these materials a fine microstructure with unique directional growth features far from equilibrium. This distinctive microstructure, together with other special features and microstructural defects originating from the additive manufacturing process, is known to greatly influence the corrosion behaviour of these materials. Several works have already been conducted in this direction. However, several issues concerning the corrosion and corrosion protection of these materials are still not well understood. This work reviews the main studies to date investigating the corrosion aspects of additively manufactured aluminium alloys. It also provides a summary and outlook of relevant directions to be explored in future research.
金属增材制造（MAM），也被称为金属3D打印，是一个快速发展的行业，其基于制造具有改进功能的复杂金属部件。在金属增材制造过程中，金属部件是使用3D计算机辅助设计模型以逐层方式生产的。使用该技术的优点包括减少材料浪费、小批量生产的高效率、近净形制造、易于更改或修订产品版本、支持晶格结构以及快速成型。如今，许多金属和合金都可以通过增材制造技术进行加工。其中，铝基合金因其相对较高的强度和刚度重量比、良好的耐磨性和耐腐蚀性以及回收潜力，在汽车和航空工业中备受关注。已知与金属增材制造工艺相关的特殊条件会在这些材料中产生具有远离平衡的独特定向生长特征的精细微观结构。这种独特的微观结构，连同源自增材制造过程的其他特殊特征和微观结构缺陷，已知会极大地影响这些材料的腐蚀行为。已经在这个方向上开展了几项工作。然而，关于这些材料的腐蚀和腐蚀防护的几个问题仍然没有得到很好的理解。这项工作回顾了迄今为止研究增材制造铝合金腐蚀方面的主要研究。它还提供了未来研究中有待探索的相关方向的总结和展望。
