Campanella Davide, Buffa Gianluca, El Hassanin Andrea, Squillace Antonino, Gagliardi Francesco, Filice Luigino, Fratini Livan
Department of Engineering, University of Palermo, Viale Delle Scienze, 90128 Palermo, Italy.
Department of Chemical, Materials and Industrial Production Engineering, University of Naples "Federico II", P.le Tecchio 80, 80125 Naples, Italy.
Int J Adv Manuf Technol. 2022;122(2):741-759. doi: 10.1007/s00170-022-09876-9. Epub 2022 Aug 16.
Since a few decades, the aircraft industry has shifted its preference for metal parts to titanium and its alloys, such as the high-strength titanium grade 5 alloy. Because of titanium grade 5 limited formability at ambient temperature, forming operations on this material requires high temperatures. In these conditions, a peculiar microstructure evolves as a result of the heating and deformation cycles, which has a significant impact on formability and product quality. On the other hand, additive manufacturing technologies, such as selective laser melting and electron beam melting, are increasingly being used and are replacing more traditional approaches such as machining and forging. Fundamental part characteristics such as mechanical and microstructural properties, geometric accuracy, and surface quality strongly depend on the selection of the manufacturing method. The authors of this paper seek to identify the strengths and limitations imposed by the intrinsic characteristics of different manufacturing alternatives for the production of parts of aeronautical significance, providing guidelines for the choice of the most appropriate manufacturing route for a given application and part design.
几十年来，航空航天工业已将对金属部件的偏好转向钛及其合金，例如高强度5级钛合金。由于5级钛在室温下的可成形性有限，对这种材料进行成形操作需要高温。在这些条件下，由于加热和变形循环会形成一种特殊的微观结构，这对可成形性和产品质量有重大影响。另一方面，增材制造技术，如选择性激光熔化和电子束熔化，正越来越多地被使用，并正在取代诸如机械加工和锻造等更传统的方法。诸如机械和微观结构性能、几何精度和表面质量等基本零件特性在很大程度上取决于制造方法的选择。本文的作者试图确定不同制造方案的内在特性对具有航空意义的零件生产所带来的优势和局限性，为针对给定应用和零件设计选择最合适的制造路线提供指导。
