Fractography of Laser Welds

2009 ◽  
pp. 131-131-19
Author(s):  
EA Metzbower ◽  
DW Moon
Keyword(s):  
Laser Welds

Microstructures and Hardness of CO2 Laser Welds in 409L Ferritic Stainless Steel

2010 ◽  
Vol 48 (04) ◽  
pp. 297-304 ◽  
Author(s):  
Jong Pan Kong ◽  
Tae Jun Park ◽  
Hye Sung Na ◽  
Jeong Kil Kim ◽  
Sang Ho Uhm ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Co2 Laser ◽  
Laser Welds

High temperature mechanical properties of Inconel 718 pulsed Nd–YAG laser welds

2006 ◽  
Vol 23 (1) ◽  
pp. 29-37 ◽  
Author(s):  
G.D. Janaki Ram ◽  
A. Venugopal Reddy ◽  
K. Prasad Rao ◽  
G. Madhusudhan Reddy
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Inconel 718 ◽  
Yag Laser ◽  
High Temperature Mechanical Properties ◽  
Laser Welds

scholarly journals Microstructural Characterization of Laser Weld of Hot-Stamped Al-Si Coated 22MnB5 and Modification of Weld Properties by Hybrid Welding

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3943
Author(s):  
Hana Šebestová ◽  
Petr Horník ◽  
Šárka Mikmeková ◽  
Libor Mrňa ◽  
Pavel Doležal ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Fusion Zone ◽  
Microstructural Characterization ◽  
Tensile Tests ◽  
Laser Weld ◽  
Martensitic Microstructure ◽  
Laser Welds ◽  
Weld Properties ◽  
Weld Fusion Zone

The presence of Al-Si coating on 22MnB5 leads to the formation of large ferritic bands in the dominantly martensitic microstructure of butt laser welds. Rapid cooling of laser weld metal is responsible for insufficient diffusion of coating elements into the steel and incomplete homogenization of weld fusion zone. The Al-rich regions promote the formation of ferritic solid solution. Soft ferritic bands cause weld joint weakening. Laser welds reached only 64% of base metal's ultimate tensile strength, and they always fractured in the fusion zone during the tensile tests. We implemented hybrid laser-TIG welding technology to reduce weld cooling rate by the addition of heat of the arc. The effect of arc current on weld microstructure and mechanical properties was investigated. Thanks to the slower cooling, the large ferritic bands were eliminated. The hybrid welds reached greater ultimate tensile strength compared to laser welds. The location of the fracture moved from the fusion zone to a tempered heat-affected zone characterized by a drop in microhardness. The minimum of microhardness was independent of heat input in this region.

Evaluation of Anodic Behavior of Commercially Pure Titanium in Tungsten Inert Gas and Laser Welds

2011 ◽  
Vol 20 (8) ◽  
pp. 628-631 ◽  
Author(s):  
Iara Augusta Orsi ◽  
Larica B. Raimundo ◽  
Osvaldo Luiz Bezzon ◽  
Mauro Antonio de Arruda Nóbilo ◽  
Sebastião E. Kuri ◽  
...  
Keyword(s):  
Pure Titanium ◽  
Inert Gas ◽  
Commercially Pure Titanium ◽  
Anodic Behavior ◽  
Commercially Pure ◽  
Laser Welds

scholarly journals Neutron Strain Scanning of Fibre and Diode Laser Welds in Stainless Steel and Ti6Al4V

2014 ◽  
Vol 56 ◽  
pp. 1277-1285
Author(s):  
K.T. Voisey ◽  
J. Folkes ◽  
J. Srithorn ◽  
D.J. Hughes
Keyword(s):  
Stainless Steel ◽  
Diode Laser ◽  
Laser Welds
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