Acting Mechanism of Active YAG Laser Welding of 6061 Aluminum Alloy Plate with Lower Power

2013 ◽  
Vol 49 (04) ◽  
pp. 37 ◽  
Author(s):  
Xiaobo WANG
Keyword(s):  
Aluminum Alloy ◽  
Laser Welding ◽  
Alloy Plate ◽  
Yag Laser ◽  
6061 Aluminum Alloy ◽  
Lower Power ◽  
Acting Mechanism ◽  
Aluminum Alloy Plate

Numerical Simulation of Laser Welding for Different Thickness Aluminum Alloy Plate

2011 ◽  
Vol 391-392 ◽  
pp. 642-647 ◽  
Author(s):  
Tian Yu Zhang ◽  
Hua Chen
Keyword(s):  
Aluminum Alloy ◽  
Temperature Field ◽  
Heat Stress ◽  
Laser Welding ◽  
Thin Plate ◽  
Distribution Law ◽  
Alloy Plate ◽  
Melting Pool ◽  
Aluminum Alloy Plate ◽  
Different Thickness

The temperature field and stress field of laser welding were simulated by "ansys" analysis soft of finite element for different thickness aluminum alloy plate. The results show that quasi steady state temperature field were formed after laser act on aluminum alloy plate for a certain time. Because heating volume of thin plate is small than one of thickness plate under the same amount of heat input, thin plate has greater grads of temperature and melting pool size. Distribution law of heat stress is similarity with common melt welding. However. heat stress filed area and its peak value of thin plate is greater than one of thickness plate.

The Effect of Elastic Pre-Bending on the Laser Peen Forming of 2024-T351 Aluminum Alloy Plate

2014 ◽  
Vol 496-500 ◽  
pp. 133-136 ◽  
Author(s):  
Lei Chen ◽  
Yong Xiang Hu ◽  
Gang Fang ◽  
Zhen Qiang Yao ◽  
Xing Wei Zheng
Keyword(s):  
Aluminum Alloy ◽  
Laser Energy ◽  
Metal Plate ◽  
Curvature Radius ◽  
Plate Bending ◽  
Alloy Plate ◽  
Yag Laser ◽  
Peen Forming ◽  
Aluminum Alloy Plate ◽  
Convex Deformation

Laser peen forming, is a purely mechanical forming method achieved through the use of laser energy to form metal plate with small curvatures. Experiments were performed to investigate the effect of pre-bending on the plate bending deformation induced by laser peen forming. The pre-bending of plate was accomplished by a fixture with the cambered top surface. The pre-bending curvature radius is calculated and is used to design cambered surface. The LPF experiments are performed with Nd: YAG laser with overlapping laser spots. It is found that the convex deformation can be induced after laser shocks. And its curvature radius in the elastically elongated direction can be greatly increased by applying pre-bending, while in the perpendicular direction, the curvature radius is decreased.

Development of Local Reinforcement and Local Metallic Foam Using FSP

2010 ◽  
Vol 638-642 ◽  
pp. 1267-1272
Author(s):  
Koshi Yamamura ◽  
Tadashi Nishihara
Keyword(s):  
Aluminum Alloy ◽  
Metal Matrix ◽  
Metallic Foam ◽  
Matrix Composites ◽  
Alloy Plate ◽  
6061 Aluminum Alloy ◽  
Local Dispersion ◽  
Friction Stir ◽  
Aluminum Alloy Plate ◽  
A New Technique

Friction stir welding (FSW) has been generating interest in association with friction stir processing (FSP), a new technique that employs FSW tooling. In a recent study, this author investigated the excellent fluidity of aluminum alloy with FSP for creating metal matrix composites (MMCs) by the local dispersion of aluminum oxide particulate in aluminum alloy. In this study, two novel methods of property modifications, local reinforcement and local metallic foam of 6061 aluminum alloy by FSP, are proposed. Tungsten carbide (WC) particulate and SiC whisker reinforced aluminum alloy plate are produced for local reinforcement of 6061Al by FSP. FSP can also produce local aluminum composites containing titanium hydride (TiH2) particles. These results, which indicate the feasibility of producing local metallic foam by FSP, are discussed in terms of microstructure and mechanical properties.

Investigation of Fatigue Growth Behavior of an Inclined Crack in Aluminum Alloy Plate

2018 ◽  
Vol 18 (5) ◽  
pp. 1159-1167 ◽  
Author(s):  
Jun Wang ◽  
Xing-Quan Zhang ◽  
Wei Wei ◽  
Jin-Yu Tong ◽  
Bin Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Growth Behavior ◽  
Inclined Crack ◽  
Alloy Plate ◽  
Aluminum Alloy Plate

scholarly journals Effects of Pre-Tensile Deformation on the Fatigue Fracture Behavior of Annealed 7005 Aluminum Alloy Plate

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 623
Author(s):  
Ni Tian ◽  
Zhen Feng ◽  
Xu Shi ◽  
Wenze Wang ◽  
Kun Liu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Fatigue Fracture ◽  
Tensile Deformation ◽  
Thin Strip ◽  
Second Phase ◽  
Alloy Matrix ◽  
Alloy Plate ◽  
Dislocation Distribution ◽  
Aluminum Alloy Plate

In the present study, the fatigue life and fatigue fracture characteristics of annealed 7005 aluminum alloy plates subjected to different pre-tensile deformations were investigated. The results obtained upon increasing the pre-tensile deformation of the alloy plate to 20% revealed that the second-phase particles did not show any obvious changes, and that the thickness of the thin strip grain slightly decreased. The dislocation distribution in the alloy matrix varied significantly among the grains or within each grain as the dislocation density gradually increased with increasing pre-tensile deformation. Moreover, the fatigue performance of the annealed 7005 aluminum alloy plate was significantly improved by the pre-tensile deformation, and the alloy plate subjected to 20% pre-tensile deformation exhibited an optimal fatigue life of ~1.06 × 106 cycles, which was 5.7 times and 5.3 times that of the undeformed and 3% pre-stretched alloy plates, respectively. Two fatigue life plateaus were observed in the pre-tensile deformation ranges of 3–5% and 8–12%, which corresponded to heterogeneous dislocation distribution among various grains and within each grain, respectively. Moreover, two large leaps in the plot of the fatigue-life–pre-tensile-deformation curve were observed, corresponding to the pre-tensile deformation ranges of 5–8% and 16–20%, respectively.

Effect of Residual Aluminum Thickness on Microstructure and Strength of Friction Stir Spot Welded Aluminum Alloy/Copper Lap Joint

2021 ◽  
Vol 1042 ◽  
pp. 3-8
Author(s):  
Mitsuhiro Watanabe ◽  
Shinpei Sasako
Keyword(s):  
Aluminum Alloy ◽  
Pure Copper ◽  
Optical Microscope ◽  
Copper Plate ◽  
Laminate Structure ◽  
Alloy Plate ◽  
Friction Stir ◽  
Residual Aluminum ◽  
Welding Interface ◽  
Aluminum Alloy Plate

Dissimilar metal lap joining of A5052 aluminum alloy plate and C1100 pure copper plate was performed by using friction stir spot welding. The rotating welding tool, which was composed of a probe part and a shoulder part, was plunged from the aluminum alloy plate which was overlapped on the copper plate, and residual aluminum alloy thickness under the probe part of the welding tool after plunging of the welding tool was controlled in the range from 0 mm to 0.4 mm. The strength of the welding interface was evaluated by using tensile-shear test. Microstructure of the welding interface was examined by using an optical microscope and a field emission scanning electron microscope. The welding was achieved at the residual aluminum alloy thickness under the probe part of the welding tool below 0.3 mm. The welded area was formed at aluminum alloy/copper interface located under the probe part of the welding tool, and its width increased with decreasing the residual aluminum alloy thickness. A characteristic laminate structure was produced in the copper matrix near the welding interface. In the joint fabricated at the residual aluminum alloy thickness below 0.1 mm, hook of Cu was formed at edge of the welded area. The fracture did not occur at the welding interface. A remarkable improvement in strength was observed in the joint fabricated at the residual aluminum alloy thickness below 0.1 mm. The formation of laminate structure and hook is considered to result in joint strength improvement.

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