Shear and Hardness Properties Study of AA-6061 Aluminium Alloy Lap-Joints Produced by Friction Stir Spot Welding Process Using H13 Tool Steel. IJEMM [Internet]. 2021 Jul. 15 [cited 2025 Jun. 22];6(3):187-94. Available from: https://www.deerhillpublishing.com/index.php/ijemm/article/view/191