EVALUATION OF STAINLESS STEEL 316L JOINTS WELDED BY LASER | ||||
| Journal of Al-Azhar University Engineering Sector | ||||
| Article 32, Volume 14, Issue 50, January 2019, Page 229-236 PDF (371.1 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/auej.2019.28514 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A M Hussien1; Adel. B. El-Shabasy1; Khalid M. Abd El-Ghany2 | ||||
| 1Design and Production Department, Ainshams University, Cairo, Egypt | ||||
| 2Department, Centeral Metallurgical Center and Research Institute, Helwan | ||||
| Abstract | ||||
| Continuous wave diode pumped Nd:YAG laser was applied to weld AISI 316L Stainless steel. Butt joint sheets of 1.5 mm thickness and 30 mm width were joined together in a single pass without using filler material. Design of experiment is applied to investigate the effects of laser power and welding speed on penetration depth and mechanical properties (tensile strength and microhardness). The depth of penetration is directly proportional to the laser power and inversely proportional with the welding speed. Maximum penetration depth was 753 μm. The tensile strength is directly proportional with the laser power. Maximum tensile strength is 632 MPa. Ductile fracture is revealed by SEM analysis. The average value of microhardness of the weld is 275 HV while the average of the base metal reached 225 HV, this is because of the presence of different phases in weld metal from base metal. | ||||
| Keywords | ||||
| Laser welding; Stainless steel 316L; Microhardness; tensile strength | ||||
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