Effect of Filler Wire Composition on the Nd:YAG Laser Weldability of 6061 Aluminum Alloy

2005 ◽  
Vol 475-479 ◽  
pp. 2591-2594 ◽  
Author(s):  
Jong Won Yoon ◽  
Young Sup Lee ◽  
Kyoung Don Lee ◽  
Ki Young Park
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Grain Boundaries ◽  
Nd:Yag Laser ◽  
Solidification Cracking ◽  
Filler Wire ◽  
6061 Aluminum Alloy ◽  
Wire Feed

2 mm thick 6061-T6 aluminum alloy sheets were I square butt welded using 3kW Nd:YAG laser. Filler wires of 1 mm diameter, 5183A(Al-4wt.%Mg), 4043A(Al-5wt.%Si) and 4047A (Al-12wt.%Si) were used. The welds made with 4047A wire showed the lowest solidification cracking among the welds investigated. Abundant amount of Al-12wt.%Si eutectic which was observed at the grain boundaries of the 4047A wire feed welds was closely related with the reduced solidification cracking susceptibility. Yield and tensile strength, and formability of the welds made with 4047A wire were improved compared to the welds made with other filler wires, which is attributed to the reduced cracking susceptibility in the welds.

Effect of Filler Wire Composition on the Nd:YAG Laser Weldability of 6061 Aluminum Alloy

2005 ◽  
pp. 2591-2594
Author(s):  
Jong Won Yoon ◽  
Young Sup Lee ◽  
Kyoung Don Lee ◽  
Ki Young Park
Keyword(s):  
Aluminum Alloy ◽  
Nd:Yag Laser ◽  
Filler Wire ◽  
6061 Aluminum Alloy

Optimization of Laser Welding Parameters in Aluminum Alloy Welding and Development of Quality Monitoring System for Light Weight Vehicle

2012 ◽  
Vol 706-709 ◽  
pp. 2998-3003 ◽  
Author(s):  
Young Whan Park ◽  
Dong Yun Kim
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Laser Welding ◽  
Monitoring System ◽  
Welding Speed ◽  
Feed Rate ◽  
Laser Power ◽  
Filler Wire ◽  
Weld Quality ◽  
Wire Feed

In this paper laser welding AA5182 of aluminum alloy with AA5356 filler wire were performed with respect to laser power, welding speed, and wire feed rate. The experiments showed that the tensile strength of the weld was higher than that of the base material under sufficient heat input conditions. A genetic algorithm was used to optimize process parameters which were the laser power, welding speed, and wire feed rate. To do that, a fitness function was formulated, taking into account weldability and productivity. A factor for the weldabilty used tensile strength estimation model which was made by neural network, and as the productivity, welding speed, and wire feed rate were used. Weld monitoring system for aluminum laser welding with filler wire was constructed through the optical sensors to measure the plasma light intensity. Relationship between monitoring signal and plasma and keyhole behavior according to welding condition was analyzed and it was found that sensor signal could express the information for weld quality. Weld quality estimation algorithm was formulated fuzzy multi feature pattern recognition algorithm using the monitoring signals. Quality prediction system was also developed to apply this algorithm to production line.

scholarly journals Comparative in Mechanical Behavior of 6061 Aluminum Alloy Welded by Pulsed GMAW with Different Filler Metals and Heat Treatments

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4157 ◽  
Author(s):  
Isidro Guzmán ◽  
Everardo Granda ◽  
Jorge Acevedo ◽  
Antonia Martínez ◽  
Yuliana Dávila ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Weld Joint ◽  
Welding Process ◽  
Mechanical Resistance ◽  
6061 Aluminum Alloy ◽  
Β Phase ◽  
Welding Processes ◽  
Filler Metals

Precipitation hardening aluminum alloys are used in many industries due to their excellent mechanical properties, including good weldability. During a welding process, the tensile strength of the joint is critical to appropriately exploit the original properties of the material. The welding processes are still under study, and gas metal arc welding (GMAW) in pulsed metal-transfer configuration is one of the best choices to join these alloys. In this study, the welding of 6061 aluminum alloy by pulsed GMAW was performed under two heat treatment conditions and by using two filler metals, namely: ER 4043 (AlSi5) and ER 4553 (AlMg5Cr). A solubilization heat treatment T4 was used to dissolve the precipitates of β”- phase into the aluminum matrix from the original T6 heat treatment, leading in the formation of β-phase precipitates instead, which contributes to higher mechanical resistance. As a result, the T4 heat treatment improves the quality of the weld joint and increases the tensile strength in comparison to the T6 condition. The filler metal also plays an important role, and our results indicate that the use of ER 4043 produces stronger joints than ER 4553, but only under specific processing conditions, which include a moderate heat net flux. The latter is explained because Mg, Si and Cu are reported as precursors of the production of β”- phase due to heat input from the welding process and the redistribution of both: β” and β precipitates, causes a ductile intergranular fracture near the heat affected zone of the weld joint.

scholarly journals Evaluation of Tensile Strength and Fatigue Strength of 6061 Aluminum Alloy Friction Welded Joint

2002 ◽  
Vol 51 (9Appendix) ◽  
pp. 156-161
Author(s):  
Hiizu OCHI ◽  
Takeshi SAWAI ◽  
Yoshiaki YAMAMOTO ◽  
Masayuki KURITA ◽  
Koichi OGAWA ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Fatigue Strength ◽  
Welded Joint ◽  
6061 Aluminum Alloy

scholarly journals Effects of Filler Wires on the Microstructure and Mechanical Properties of 2195-T6 Al-Li Alloy Spray Formed by TIG Welding

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3559 ◽  
Author(s):  
Yuhui Zhang ◽  
Huan Li ◽  
Chuanguang Luo ◽  
Lijun Yang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Grain Boundaries ◽  
Fracture Mode ◽  
Weld Joint ◽  
Space Vehicle ◽  
Fusion Line ◽  
Filler Wire ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties

The main purpose of this work was to investigate the microstructure and mechanical properties of spray-formed 2195-T6 Al-Li alloy welding joints produced by tungsten inert gas (TIG) with Al-Cu and Al-Si-Cu filler wires, so that they can be better used in space vehicle tanks. The porosity analysis indicates that the porosity area of the weld seam with the Al-Si-Cu filler wire is approximately 7.989 times larger than that of the Al-Cu filler wire. Furthermore, the microstructure and microhardness results indicate that the Al/Cu eutectic near the fusion line distributes more at the grain boundaries, while more dispersed Al2Cu phase is found inside the grain, which improves the strength of the joint when using Al-Cu filler wire. However, when using the Al-Si-Cu filler wire, more Si, Cu, and Ti elements are segregated at the grain boundaries, forming a brittle-hard network Al/Cu/Ti eutectic, which reduces the performance of the joint. Additionally, the tensile strength and elongation of the weld joint are about 68.6% and 89.9% of the base metal (BM) when using the Al-Cu filler wire, and can approach the level of friction stir welding (FSW). However, the tensile strength and elongation are only about 56.8% and 39.9%, respectively, of the BM in the weld joint when using the Al-Si-Cu filler wire. Lastly, the fractures both occur on the fusion line and the fracture morphology of the weld joint shows that it is a mixed fracture mode dominated by plastic fracture when using Al-Cu filler wire, while it is mainly a quasi-cleavage fracture mode when using Al-Si-Cu filler wire. Therefore, the joint strength when using Al-Si-Cu filler wire with high strength matching is not as good as that of Al-Cu filler wire with low strength matching.

Study of Shear Fracture Behaviours on 6061 Aluminum Alloy

2011 ◽  
Vol 291-294 ◽  
pp. 1145-1148
Author(s):  
Hao Zhu ◽  
Yang Zhang ◽  
Shen Wei Yu
Keyword(s):  
Shear Stress ◽  
Aluminum Alloy ◽  
Grain Boundaries ◽  
Shear Fracture ◽  
Tensile Shear ◽  
Shear Tests ◽  
Tensile Direction ◽  
6061 Aluminum Alloy ◽  
Shear Yield

The mechanics properties and fracture behaviors of 6061 aluminum alloy were investigated by the tensile shear tests and in-situ tensile shear tests with tensile shear specimen devised. The results indicate that a lot of slip bands parallel to tensile direction are produced on specimens’ surfaces. With shear strain rates increasing, the shear yield stress and shear ultimate stress of 6061 aluminum alloy remain constant basically, but the shear fracture strain decreased obviously. The grain boundaries of 6061 aluminum alloy are the weakest area and microcracks initiate at the grain boundaries parallel to tensile direction under shear stress. With shear stress increasing, the microcracks extend and coalesce. The fracture of specimens is due to coalescence or shearing between the microcracks.

Microstructure and Mechanical Properties of a 6061 Aluminum Alloy Part Prepared by Casting-Forging Integrated Forming Technology

2014 ◽  
Vol 788 ◽  
pp. 215-222
Author(s):  
Yong Peng ◽  
Shun Cheng Wang ◽  
Hai Tao Zhou ◽  
Kai Hong Zheng ◽  
He Xing Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Ultimate Tensile Strength ◽  
Casting Condition ◽  
6061 Aluminum Alloy ◽  
Forming Technology ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Alloy Part

The effect of applied forging pressure on microstructure and mechanical properties of 6061 aluminum alloy was examined. The results showed that the ultimate tensile strength, elongation and hardness of the alloy after heat-treated treatment increase with the applied forging pressure, and the corresponding highest values, 365MPa, 11.52% and 146.53HV, were obtained at the applied forging pressure of 120MPa. Compared to casting condition without forging pressure, the ultimate tensile strength, elongation and hardness can be increased by 22.8%, 98.2% and 48.7%, respectively. The defects such as the shrinkage pores and cracks were absent in the microstructure due to the applied forging pressure. The SEM observation indicated that the fracture mode of 6061 aluminum alloy is more ductile at higher applied forging pressure.

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