中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 27 No. 8 August 2017 |
（1. Department of Materials and Metallurgical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran; 2. Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; 3. Department of Mining and Metallurgical Engineering, Yazd University, Yazd 89195-741, Iran; 4. Department of Mechanical Engineering, Arak University of Technology, Arak 3818141167, Iran; 5. Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada）
Abstract:The main aim of this research is to optimize the tensile strength of laser welded FeCo-V alloy. A mathematical relationship was developed to predict tensile strength of the laser beam welded FeCo-V foils by incorporating process parameters such as lamping current, welding speed, pulse duration and focused position. The procedure was established to improve the weld strength and increase the productivity. The results indicate that the pulse duration and welding speed have the greatest influence on tensile strength. The obtained results showed that the tensile strength of the weld joints increase as a function of increasing pulse duration reaching to a maximum at a pulse duration value of 2.25 ms. Moreover, the tensile strength of joints increases with decrease in welding speed reaching to a maximum at a welding speed of 125 mm/min. It has been shown that increase in pulse duration and decrease in welding speed result in increased effective peak power density and hence formation of more resistant welds. At higher pulse durations and lower welding speeds, the tensile strength of weld joints decreases because of formation of solidification microcracks in the fusion zone.
Key words: Nd:YAG laser welding; FeCo-V magnetic alloys; response surface methodology; mechanical properties; optimization
