In recent years, a great effort has been devoted to developing a new generation of materials for aeronautic applications. The driving force behind this effort is the reduction of costs, by extending the service life of aircraft parts (structural and engine components) and increasing fuel efficiency, load capacity and flight range. The present paper examines the most important classes of metallic materials including Al alloys, Ti alloys, Mg alloys, steels, Ni superalloys and metal matrix composites (MMC), with the scope to provide an overview of recent advancements and to highlight current problems and perspectives related to metals for aeronautics.

Alloys for aeronautic applications: State of the art and perspectives

Joining of automotive sheet materials by friction-based welding methods: A review

Refilled friction stir spot welding of aluminum alloy to galvanized steel sheets

Microstructure and mechanical properties of keyhole repair welds in AA 7075-T651 using refill friction stir spot welding

Hook formation and mechanical properties of friction spot welding in alloy 6061-T6

The influence of refill FSSW parameters on the microstructure and shear strength of 5042 aluminium welds

Friction Spot Welding (FSpW) is considered to be a competitive technique for producing high quality welds, especially in lightweight alloys. The geometric defects and features originating at the interface between the two welded sheets have an important influence on the mechanical performance of the joint. This work investigates the weld microstructure for FSpW in AA 5052 sheets produced using tool rotational speeds of 900, 1400 or 1900 rpm. OM and SEM were used to analyse the microstructural features of the weld. The mechanical performance was investigated using shear tensile testing, and the fracture mechanisms were assessed by SEM. Three distinct weld interfaces were observed and named as follows: primary bonding, partial bonding and secondary bonding. For welds processed at a lower tool rotational speed (900 rpm), the equivalent bonding ligament is increased, resulting in better joint mechanical performance.

J. A. Mazzaferro

Papers

The influence of refill FSSW parameters on the microstructure and shear strength of 5042 aluminium welds

The weld interface for friction spot welded 5052 aluminium alloy