Effect of sheet thickness on the fusion zone temperature distribution, melt pool dimensions, mechanical properties, and microstructure in laser welding of Ti6Al4V alloy

2021 ◽  
Vol 33 (3) ◽  
pp. 032005
Author(s):  
Adnan I. Khdair ◽  
Montasir Hader ◽  
Khaleel Abushgair ◽  
Samir Khrais
Keyword(s):  
Mechanical Properties ◽  
Temperature Distribution ◽  
Laser Welding ◽  
Fusion Zone ◽  
Sheet Thickness ◽  
Ti6al4v Alloy ◽  
Melt Pool ◽  
Zone Temperature

Numerical simulation and designing artificial neural network for estimating melt pool geometry and temperature distribution in laser welding of Ti6Al4V alloy

Optik ◽  
2016 ◽  
Vol 127 (23) ◽  
pp. 11161-11172 ◽  
Author(s):  
Mohammad Akbari ◽  
Seyfolah Saedodin ◽  
Afshin Panjehpour ◽  
Mohsen Hassani ◽  
Masoud Afrand ◽  
...  
Keyword(s):  
Neural Network ◽  
Numerical Simulation ◽  
Artificial Neural Network ◽  
Temperature Distribution ◽  
Laser Welding ◽  
Ti6al4v Alloy ◽  
Melt Pool ◽  
Artificial Neural

scholarly journals High-Power Fiber Laser Welding of High-Strength AA7075-T6 Aluminum Alloy Welds for Mechanical Properties Research

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7498
Author(s):  
Abdel-Monem El-Batahgy ◽  
Olga Klimova-Korsmik ◽  
Aleksandr Akhmetov ◽  
Gleb Turichin
Keyword(s):  
Mechanical Properties ◽  
Laser Welding ◽  
Fiber Laser ◽  
Fusion Zone ◽  
High Power ◽  
Heat Input ◽  
Welded Joint ◽  
High Strength ◽  
Residual Tensile Stress ◽  
Fiber Laser Welding

The results disclosed that both the microstructure and mechanical properties of AA7075-T6 laser welds are considerably influenced by the heat input. In comparison with high heat input (arc welding), a smaller weld fusion zone with a finer dendrite arm spacing, limited loss of alloying elements, less intergranular segregation, and reduced residual tensile stress was obtained using low heat input. This resulted in a lower tendency of porosity and hot cracking, which improved the welded metal’s soundness. Subsequently, higher hardness as well as higher tensile strength for the welded joint was obtained with lower heat input. A welded joint with better mechanical properties and less mechanical discrepancy is important for better productivity. The implemented high-power fiber laser has enabled the production of a low heat input welded joint using a high welding speed, which is of considerable importance for minimizing not only the fusion zone size but also the deterioration of its properties. In other words, high-power fiber laser welding is a viable solution for recovering the mechanical properties of the high-strength AA 7075-T6 welds. These results are encouraging to build upon for further improvement of the mechanical properties to be comparable with the base metal.

Microstructures and Mechanical Properties on Laser Welded Joints of Automotive High Strength Complex Phase Steel

2010 ◽  
Vol 97-101 ◽  
pp. 3957-3962
Author(s):  
Lian Hai Hu ◽  
Qi Yan ◽  
Jian Huang ◽  
Yi Xiong Wu
Keyword(s):  
Mechanical Properties ◽  
Laser Welding ◽  
Fusion Zone ◽  
Base Metal ◽  
Automobile Industry ◽  
Welded Joint ◽  
High Strength ◽  
Uniaxial Tensile ◽  
Complex Phase ◽  
The Impact

Reducing car’s weight has become an important goal for automobile industry. Laser welding of automotive high-strength steel plays a significant role in producing light weight cars. Experiments of CO2 high power laser welding of 1000MPa grade complex phase steels with a thickness of 3mm for automobile were performed using a 15 KW CO2 laser. The macrostructure and microstructure of the welded joint were examined by optical microscope. Mechanical properties of the welded joint, fusion zone and base metal were assessed by microhardness distribution across the welded joint, uniaxial tensile test and charpy V-notch impact test. Fractographs of the impact specimens were studied by scanning electron microscopy (SEM). It is found that the fusion zone has a higher toughness than that of the base metal and fusion line. The test results show good mechanical properties of laser welds that can meet the technical requirements for automobile Industry.

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