Microstructure and mechanical properties of CLF-1/316 L steel dissimilar joints welded with fiber laser welding

2A97 Al-Li alloy with good comprehensive performance is a new type of Al-Li alloys in our country,in order to meet the ever-increased long-term requirements of aerospace,aviation and armament industries,microstructure and mechanical properties of 2A97Al-Li alloy fiber laser welding joint were analyzed in this paper.The results show that:2A97 Al-Li alloy laser welding joints from welding fusion line to the center of welding seam are non-dendritic equiaxed grain zone,columnar crystal zone,columnar dendrite zone,equiaxed dendrite zone.Precipitates θ,T2 and T1 are probably exited in FZ,hardness of the center of FZ is the lowest.Yield strength of welding joints are about 70% of base metal,tensile strength are approximately 63% of the base metal.

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Microstructure and mechanical properties of TC4/6061 and TC4/2024 dissimilar joints by autogenous laser welding-brazing

Optics & Laser Technology ◽

10.1016/j.optlastec.2022.107867 ◽

2022 ◽

Vol 149 ◽

pp. 107867

Author(s):

Zhiwei Wang ◽

Junqi Shen ◽

Shengsun Hu ◽

Chengxuan Yin ◽

Xianzheng Bu

Keyword(s):

Mechanical Properties ◽

Laser Welding ◽

Dissimilar Joints ◽

Microstructure And Mechanical Properties

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Influence of laser power on microstructure and mechanical properties of fiber laser-tungsten inert gas hybrid welded Mg/Cu dissimilar joints

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2015.04.022 ◽

2015 ◽

Vol 78 ◽

pp. 51-62 ◽

Cited By ~ 20

Author(s):

Caiwang Tan ◽

Wenxiong He ◽

Xiangtao Gong ◽

Liqun Li ◽

Jicai Feng

Keyword(s):

Mechanical Properties ◽

Fiber Laser ◽

Laser Power ◽

Inert Gas ◽

Dissimilar Joints ◽

Microstructure And Mechanical Properties

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Investigating the effect of process parameters on the mechanical properties and temperature distribution in fiber laser welding of AISI304 and AISI 420 sheet using response surface methodology

Infrared Physics & Technology ◽

10.1016/j.infrared.2020.103478 ◽

2020 ◽

Vol 111 ◽

pp. 103478

Author(s):

Amirhosein Mosavi ◽

Ahmad Soleimani ◽

Alireza Karimi ◽

Mohammad Akbari ◽

Arash Karimipour ◽

...

Keyword(s):

Mechanical Properties ◽

Response Surface Methodology ◽

Temperature Distribution ◽

Laser Welding ◽

Fiber Laser ◽

Response Surface ◽

Process Parameters ◽

Fiber Laser Welding ◽

Aisi 420

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

Materials ◽

10.3390/ma14247498 ◽

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.

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