Development of low-melting-point filler materials for laser beam brazing of aluminum alloys

2014 ◽  
Vol 45 (8) ◽  
pp. 717-726 ◽  
Author(s):  
C. Cui ◽  
A. Schulz ◽  
L. Achelis ◽  
V. Uhlenwinkel ◽  
H. Leopold ◽  
...  
Keyword(s):  
Melting Point ◽  
Aluminum Alloys ◽  
Laser Beam ◽  
Filler Materials

Novel Direct Cladding of Magnesium and Aluminum Alloys Using a Horizontal Twin Roll Caster

2021 ◽  
Vol 880 ◽  
pp. 17-22
Author(s):  
Geng Yan Feng ◽  
Hisaki Watari ◽  
Mayumi Suzuki ◽  
Toshio Haga ◽  
Toru Shimizu
Keyword(s):  
Melting Point ◽  
Aluminum Alloys ◽  
Mixed Layer ◽  
Mixing Layer ◽  
Reduction Rate ◽  
Bonding Interface ◽  
Shearing Strength ◽  
One Step ◽  
Twin Roll Caster ◽  
Twin Roll

This study introduces the direct cladding of magnesium and aluminum alloys using a horizontal twin roll caster in one step. A horizontal twin roll caster can cast a Mg/Al clad strip with thickness exceeding 5mm at a roll speed of 8m/min in one step, which is difficult for a vertical twin roll caster. Therefore, it is possible to cast a thick clad strip with different melting point alloys using a horizontal twin roll caster at low speed. It is also possible to cast clad strips using as the overlay an alloy that has a higher melting point than that of the base strips. The thickness of the Mg/Al clad strip is 6.5mm, and the ratio of the Mg layer to the Al layer is 3:2. The surface of the clad strip is good, and there is no void between bonding interfaces. The mixing layer of the bonding interface is deeply related to the reduction rate. As the reduction rate increases, the mixing layer becomes more balanced and the thickness of the mixed layer decreases to 68μm. By observation of the interface of the cladded material, the mixed layer of the bonding interface is divided into two layers. It has been found the mixed layer near the Al layer has the highest hardness (up to 228HV), and the tensile shearing strength of the manufactured Mg/Al clad strip was 44MPa.

Influence of the Temperature in the Direct Forming Laser Process of 316L Stainless Steel with CO2 Laser

2014 ◽  
Vol 802 ◽  
pp. 334-337
Author(s):  
C.L. Santos ◽  
G. Vasconcelos ◽  
H.S. Oliveira ◽  
L.G. Oliveira ◽  
J.F. Azevedo ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Melting Point ◽  
Laser Beam ◽  
316L Stainless Steel ◽  
Turbine Blades ◽  
Scanning Speed ◽  
Sample Surface ◽  
Laser Process

This study shows the influence of the temperature in the Direct Forming Laser process (DFL) of 316L stainless steel metal powder. Results shows that an increasing in the sample surface temperature can improve the laser beam absorption in the DFL process. A pre-heating in the substrate and in the powder contributed to decrease the time to reach the melting point and to improve the surface roughness. This effect was investigated with constant lasers parameters (scanning speed and intensity) and a heating in the samples in the temperature range of 20oto 200oC. It was possible to evaluate the DFL process and to optimize the quality of the sample surface roughness. These results will benefit the knowledge of the DFL technology that can be applied in the development of turbine blades.

Mechanical properties of laser beam welded similar and dissimilar aluminum alloys

2017 ◽  
Vol 29 ◽  
pp. 272-280 ◽  
Author(s):  
J. Enz ◽  
M. Kumar ◽  
S. Riekehr ◽  
V. Ventzke ◽  
N. Huber ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Laser Beam ◽  
Dissimilar Aluminum Alloys

The influence of salt fog exposure on the fatigue performance of Alclad 6xxx aluminum alloys laser beam welded joints

2010 ◽  
Vol 45 (16) ◽  
pp. 4390-4400 ◽  
Author(s):  
A. T. Kermanidis ◽  
A. D. Zervaki ◽  
G. N. Haidemenopoulos ◽  
Sp. G. Pantelakis
Keyword(s):  
Aluminum Alloys ◽  
Laser Beam ◽  
Welded Joints ◽  
Fatigue Performance ◽  
Salt Fog
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