List of Articles Heat Source Model Open Access Article Abstract Page Full-Text 1 - Experimental Study and Finite Element Simulation of Residual Stress in Welded Sections of Steel P91 Pipes with Multi-pass Welding Davood Azadi Nosratollah Solhjoei SayedAli Mousavi Open Access Article Abstract Page Full-Text 2 - Numerical and Experimental Study of Geometrical Dimensions on Laser-TIG Hybrid Welding of Stainless Steel 1.4418 Mahmoud Moradi Majid Ghoreishi Azam Rahmani