Comparative investigation between fiber laser and disk laser: Microstructure feature of 2219 aluminum alloy welded joint using different laser power and welding speed

2021 ◽  
Vol 141 ◽  
pp. 107121
Author(s):  
Shi He ◽  
Liyuan Liu ◽  
Yanqiu Zhao ◽  
Yue Kang ◽  
Feifan Wang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fiber Laser ◽  
Welding Speed ◽  
Laser Power ◽  
Welded Joint ◽  
Comparative Investigation ◽  
Disk Laser ◽  
2219 Aluminum Alloy

Peculiarities of AD33 aluminum alloy hand laser welding

2020 ◽  
Vol 2020 (12) ◽  
pp. 13-17
Author(s):  
Nikolay Proskuryakov ◽  
Uliana Putilova ◽  
Rasul Mamadaliev ◽  
Oleg Teploukhov
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Laser Welding ◽  
Welded Joint ◽  
Comparative Investigation ◽  
Micro Structure ◽  
Joint Quality ◽  
Beam Motion

The comparative investigation results of AD33 aluminum alloy welded joint quality dependence upon changes in a laser beam motion rate for conditions of hand and automatic laser welding are shown. A micro-structure of a welded joint at the hand and automatic laser welding of the AD33 alloy is investigated.

Fiber Laser Welding of Noncombustible Magnesium Alloy

2008 ◽  
Vol 580-582 ◽  
pp. 479-482 ◽  
Author(s):  
Yuji Sakai ◽  
Kazuhiro Nakata ◽  
Takuya Tsumura ◽  
Mitsuji Ueda ◽  
Tomoyuki Ueyama ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Vickers Hardness ◽  
Laser Power ◽  
Welded Joint ◽  
Welding Process ◽  
Fiber Laser Welding ◽  
Laser Welding Process

Noncombustible magnesium alloy AMC602 (Mg-6mass%Al-2mass%Ca) extruded sheet of 2.0mm thickness was successfully welded using a fiber laser welding process at welding speed of 10m/min at 3kW laser power. Tensile strength of the welded joint was about 82 to 88% of that of the base metal. Vickers hardness, tensile strength and micro structural properties are also discussed.

Study on the Microstructure and Mechanical Properties of Welding Joints of 7A05 Aluminum Alloy by FSW

2014 ◽  
Vol 496-500 ◽  
pp. 110-113
Author(s):  
Dong Gao Chen ◽  
Jin He Liu ◽  
Zhi Hua Ma ◽  
Wu Lin Yang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Welding Speed ◽  
Welded Joint ◽  
Optical Microscope ◽  
Nugget Zone ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties ◽  
Welding Joints

The7A05 aluminum alloy of the 10mm thickness was welded by the friction stir welding. The microstructure and mechanical Properties of the welded joint was researched by the optical microscope, etc. The results showed: the microstructure of the weld nugget zone and the thermal mechanically affected zone were refined as the welding speed increasing when the rotate speed is constant. As the welding speed increasing the strength of extension of the welded joint is increasing at first and then stable basically. but the yield strength had no obvious change.

A Parametric Study on Laser Welding of Magnesium Alloy AZ31 by a Fiber Laser

2014 ◽  
Author(s):  
Neil S. Bailey ◽  
Wenda Tan ◽  
Yung C. Shin
Keyword(s):  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Welding Speed ◽  
Laser Power ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Wrought Magnesium Alloy ◽  
Weld Pool Geometry ◽  
Good Agreement

Laser welding of wrought magnesium alloy has been investigated through experimentation and simulation. Laser butt welds and laser lap welds were performed on 2.0 mm thick magnesium alloy AZ31 plates using a 1 kW fiber laser and shielded with argon gas. The effects of laser power and welding speed on weld geometry and microstructure were investigated. Through experimentation, the ranges of operating parameters for laser power and welding speed which resulted in viable, defect-free welds were found and reported. Simulations were carried out to predict the weld pool geometry and resultant microstructure and are shown to be in good agreement with experimental results.

A Parametric Study on Laser Welding of Magnesium Alloy AZ31 by a Fiber Laser

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Neil S. Bailey ◽  
Wenda Tan ◽  
Yung C. Shin
Keyword(s):  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Welding Speed ◽  
Laser Power ◽  
Tensile Tests ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Weld Pool Geometry ◽  
Novel Processing

Laser welding of wrought magnesium alloy has been investigated through experimentation and simulation. Laser butt welds and laser lap welds were performed on 2.0 mm thick magnesium alloy AZ31 plates using a 1 kW fiber laser and shielded with argon gas. The effects of laser power and welding speed on weld geometry and microstructure were investigated. Tensile tests were performed to verify weld quality. Through experimentation, a novel processing map was created, which gives the ranges of operating parameters of laser power and welding speed that resulted in viable, defect-free welds. Numerical simulations were performed to predict the weld pool geometry and keyhole stability, and resultant microstructures are shown to be in good agreement with experimental results.

scholarly journals Microstructural Characterization and Mechanical Properties of Fiber Laser Welded CP-Ti and Ti-6Al-4V Similar and Dissimilar Joints

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 747 ◽  
Author(s):  
Alireza Abdollahi ◽  
Ahmed Shaheer Ahnaf Huda ◽  
Abu Syed Kabir
Keyword(s):  
Mechanical Properties ◽  
Fiber Laser ◽  
Welding Speed ◽  
Heat Input ◽  
Laser Power ◽  
Pure Titanium ◽  
Microstructural Characterization ◽  
Welding Parameters ◽  
Dissimilar Joints ◽  
Cp Ti

In this research, the microstructures and mechanical properties of similar and dissimilar autogenous joints of 3 mm thick commercially pure titanium (CP-Ti) and Ti-6Al-4V welded by ytterbium fiber laser (Yb:YAG) were investigated. Two sets of laser power and welding speed were selected in such a way that the heat input remained constant. Microstructural characterization of the joints was investigated by an optical microscope, and mechanical properties were determined by hardness and tensile tests. The only defects found were porosity and underfill, and no signs of lack of penetration and solidification cracks were observed in any of the joints. Microstructural evaluation of the fusion zone (FZ) showed that in similar Ti-6Al-4V joint, a supersaturated nonequilibrium α′ martensite was formed due to rapid cooling associated with laser welding. In similar CP-Ti, coarse equiaxed grains were observed in the FZ. Unlike the similar joints, a clear interface was observed between the heat-affected zone (HAZ) and the FZ in both the CP-Ti and Ti-6Al-4V sides in dissimilar joints. Among all the joints with different weld parameters, similar Ti-6Al-4V showed the highest strength and the lowest ductility. In similar CP-Ti and dissimilar joints, fractures took place in the CP-Ti base metal, but all the Ti-6Al-4V similar joints failed in the FZ. Significant changes in the strength and hardness with varying laser power and welding speed implied that the mechanical properties of the weld fusion zones were not entirely governed by the heat input but were also affected by individual welding parameters.

scholarly journals Laser-CMT Hybrid Welding-Brazing of Al/Steel Butt Joint: Weld Formation, Intermetallic Compounds, and Mechanical Properties

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3651 ◽  
Author(s):  
Yuxin Chen ◽  
Zhibin Yang ◽  
Chunyuan Shi ◽  
Zhibin Xin ◽  
Zitong Zeng
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Intermetallic Compounds ◽  
Welding Speed ◽  
Laser Power ◽  
Hybrid Welding ◽  
Imcs Layer ◽  
Feeding Speed ◽  
Wire Feeding ◽  
Interface Layers

6A01-T5 aluminum alloy and SUS301L-DLT austenitic stainless steel sheets were welded by a laser-cold metal transfer (CMT) hybrid welding-brazing method with ER5183 filler wire. We researched the weld forming, intermetallic compounds, and mechanical character, which are influenced by laser power, wire feeding speed, and welding speed. Well-formed joints with uniformly distributed interface layers were obtained under certain parameters. The spreading and wetting distance on the steel upper surface increased initially and then decreased as the laser power increased, and increased progressively as the wire feeding speed increased or welding speed decreased. There were both Fe2Al5 and Fe4Al13 in the interfacial intermetallic compounds (IMCs) layer. The thickness was controlled to within 2.0–6.9 µm. The thickness of the IMCs layer increased as the heat input increased; however, the increasing rate decreased gradually. The tensile strength of the joints was not only completely dependent on the thickness of the IMCs, but also on the spreading and wetting distance on the steel surface. The highest tensile strength could reach up to 188.7 MPa, which is about 77.1% of that of the base aluminum alloy. The tensile sample fracture occurred at the IMCs layer, and regional metallurgical bonding happened in the interface layer.

scholarly journals Effects of Ar and He on Microstructures and Properties of Laser Welded 800MPa TRIP Steel

2018 ◽  
Vol 142 ◽  
pp. 03004 ◽  
Author(s):  
Wen-Quan Wang ◽  
Shu-Cheng Dong ◽  
Fan Jiang ◽  
Ming Cao
Keyword(s):  
Tensile Strength ◽  
Base Metal ◽  
Welding Speed ◽  
Trip Steel ◽  
Laser Power ◽  
Welded Joint ◽  
Weld Line ◽  
Shielding Gases ◽  
Shielding Gas ◽  
Fiber Laser Welding

Fiber laser welding of cold rolled TRIP steel (transformation Induced Plasticity steel) sheet with tensile strength of 820MPa and thickness of 1.4mm was carried out using shielding gases Ar and He, respectively. For the same laser power and welding speed, the effects of different shielding gases on penetration and bead section morphologies were investigated. The microstructures and properties of the TRIP steel joints were also studied. The investigation showed that higher penetration and lower porosity could be obtained under shielding gas He using the same laser power and welding speed. The microstructures of the TRIP joint mainly included martensite and retained austenite. But the joint microhardness and tensile strength were higher under the shielding gas He. The tensile strength of the welded joint perpendicular to the weld line was equal to that of the base metal. But the tensile strength of the joint parallel with the weld line was higher than that of the base metal. The plasticity and formability of the welded joint were impaired due to the formation of martensite in the weld metal.

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