2026-05-30T05:54:20Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/271152026-02-03T11:21:54Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Alkhafaji, Amir author Camas-Peña, Daniel author López-Crespo, Pablo author Al-Asadi, Hayder author 2023-06-01 In this work, the influence of the tool geometry on friction stir spot welding (FSSW) was studied on sheets made of AA6061-T6 aluminum alloy. Four different AISI H13 tools with simple cylindrical and conical pin profiles and 12 mm and 16 mm shoulder diameters were used to perform the FSSW joints. Sheets of 1.8 mm thickness were used during the experimental work to prepare the lap-shear specimens. The FSSW joints were performed at room temperature. For each joining condition, four specimens were carried out. Three specimens were used to find the value of the average tensile shear failure load (TSFL), while the fourth one was used to examine the micro-Vickers hardness profile and to observe the microstructure of the cross-section of the FSSW joints. The investigation concluded that higher mechanical properties corresponding to the finer microstructure were obtained by the conical pin profile and the higher shoulder diameter compared with the specimens performed using the cylindrical pin tool and lower shoulder diameter due to the higher strain hardening and the higher frictional heat generation, respectively. Alkhafaji A, Camas D, Lopez-Crespo P, Al-Asadi H. The Influence of Tool Geometry on the Mechanical Properties and the Microstructure of AA6061-T6 Aluminum Alloy Friction Stir Spot Welding. Materials. 2023; 16(11):4135. https://doi.org/10.3390/ma16114135 https://hdl.handle.net/10630/27115 10.3390/ma16114135 Aluminio - Aleaciones The Influence of Tool Geometry on the Mechanical Properties and the Microstructure of AA6061-T6 Aluminum Alloy Friction Stir Spot Welding.