Laser Welding Conditions to Improve Tensile Strength and Fatigue Strength of a Lap Joint in Aluminum Alloys

2007 ◽  
Vol 35 (4) ◽  
pp. 100077
Author(s):  
M. R. Mitchell ◽  
R. E. Link ◽  
Kyohei Kawamoto ◽  
Shintaro Yoshimitsu ◽  
Hiroshi Noguchi ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Aluminum Alloys ◽  
Laser Welding ◽  
Lap Joint

scholarly journals Effect of pulse frequency on laser welding on SiCp/6061 aluminum alloys with powder

2021 ◽  
Vol 2079 (1) ◽  
pp. 012022
Author(s):  
Yongchao Jian ◽  
Yan Shi
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloys ◽  
Laser Welding ◽  
Base Metal ◽  
Welded Joints ◽  
Molten Pool ◽  
Particle Distribution ◽  
Pulse Frequency ◽  
Uneven Distribution

Abstract Because of the uneven distribution of reinforcement particles in the molten pool during laser welding of SiCp/6061Al composites with powder, the effect of pulse frequency on the homogenization was studied in this paper. The pulse frequency of welding is changed and the macro morphology of the weld is studied by metallographic microscope. The particle uniformity of reinforcing phase and the porosity of molten pool at different frequencies were compared. The tensile strength of welded joints at different frequencies was tested by universal tensile machine. Finally, when the pulse frequency is 160Hz, the particle distribution of reinforcing phase is the most uniform and the tensile strength is the largest. The tensile strength reaches 267.06MPa, reaching 69.1% of the base metal. When the pulse frequency is 320Hz, the porosity of the weld is the lowest, reaching 1.75%.

Prevention of Fracture of Cracked Steel Bars Using Laser: Part III—Case of High Carbon Steel

1988 ◽  
Vol 110 (4) ◽  
pp. 319-324
Author(s):  
Akira Kato
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Carbon Steel ◽  
Laser Welding ◽  
Base Metal ◽  
High Carbon Steel ◽  
High Carbon ◽  
Bending Fatigue ◽  
Static Tensile ◽  
Bending Fatigue Strength

The effect of laser welding on prevention of the fracture of cracked shafts of a high carbon steel are presented. Static tensile strength and rotary bending fatigue strength were obtained using shaft specimens of AISI W1 which were welded by a CO2 laser around a precrack. Since the welded region became extremely hard and brittle, both the strengths of laser-welded specimens were lower than those of non-welded specimens. However, the strengths were increased higher than those of non-welded specimens after tempering the specimens. It was found that when tempered at 600°C after laser welding, the rotary bending fatigue strength of specimens with a crack smaller than 12 mm rose similar to that of the base metal, and when tempered at 700° C, the static tensile strength of specimens with a crack smaller than 12mm rose similar to that of the base metal. Therefore, it was shown that the laser welding is very effective to prevent fracture of high carbon steels.

Fatigue strength in laser welding of the lap joint

2004 ◽  
Vol 40 (9-10) ◽  
pp. 1059-1070 ◽  
Author(s):  
S.-K Cho ◽  
Y.-S Yang ◽  
K.-J Son ◽  
J.-Y Kim
Keyword(s):  
Fatigue Strength ◽  
Laser Welding ◽  
Lap Joint

Modeling of butt and lap joint laser welding of aluminum alloys and constructional steel sheets

2015 ◽  
pp. 27-32
Author(s):  
A. N. Shlegel ◽  
◽  
D. S. Gusev ◽  
A. B. Ivanchenko ◽  
N. N. Evtikheev ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Laser Welding ◽  
Constructional Steel ◽  
Lap Joint ◽  
Steel Sheets

Effect of inclusion on performance of A6N01 aluminum alloy joints

2020 ◽  
Vol 10 (9) ◽  
pp. 1395-1403
Author(s):  
Mengyu Ding ◽  
Min Yu ◽  
JunWei Hua ◽  
Hui Chen
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Fatigue Strength ◽  
Stress Concentration ◽  
Aluminum Alloys ◽  
Base Metal ◽  
Tensile Loading ◽  
Loading Process ◽  
Tensile Fatigue

In order to study the effect of inclusion on performance of A6N01 aluminum alloy joints, the N-A6N01 and C-A6N01 aluminum alloys with different inclusion in amount and size were compared. Results show that the larger inclusions in amount and size in the N-A6N01 joint cause more pronounced degradation in the tensile strength than the C-A6N01 joint. However, the N-A6N01 joint shows a superior fatigue strength to the C-A6N01 under the tensile fatigue, this probably because the degradation in the tensile strength contributes a uniform performance mating between the base metal and WM, which reduces the stress concentration during the tensile loading process, and thus improving the fatigue strength.

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