Effect of Pin Shape and Rotational Speed on the Mechanical Behaviour and Microstructures of Friction Stir Spot Welding of Aa6061 Aluminum Alloy. Al-Nahrain Journal for Engineering Sciences, [S. l.], v. 20, n. 1, p. 129–139, 2017. DOI: nan. Disponível em: https://nahje.com/nahje/article/view/277. Acesso em: 27 apr. 2026.