scholarly journals Hot-cracks reduction during Laser Beam Welding in vacuum of conventionally cast Alloy-247 LC

Procedia CIRP ◽  
2020 ◽  
Vol 94 ◽  
pp. 632-637
Author(s):  
Aleksej Senger ◽  
Torsten Jokisch ◽  
Simon Olschok ◽  
Uwe Reisgen ◽  
Thomas Fischer
Keyword(s):  
Laser Beam ◽  
Cast Alloy ◽  
Laser Beam Welding ◽  
Conventionally Cast

scholarly journals Evaluation and Control of Liquation Cracking Susceptibility for CM247LC Superalloy Weld Heat-Affected Zone via Visualization-Based Varestraint Test

2021 ◽  
Vol 59 (7) ◽  
pp. 445-458
Author(s):  
Ye-Seon Jeong ◽  
Kyeong-Min Kim ◽  
Hyungsoo Lee ◽  
Seong-Moon Seo ◽  
Eun-Joon Chun
Keyword(s):  
Laser Beam ◽  
Fossil Fuels ◽  
Cast Alloy ◽  
Laser Beam Welding ◽  
Aging Treatment ◽  
Liquation Cracking ◽  
Cracking Behavior ◽  
Temperature Range ◽  
Varestraint Test ◽  
Weld Heat

The metallurgical aspects of weld cracking in Ni-based superalloys remain relatively unexplored in existing research. The present study performed comprehensive metallurgical and manufactural investigations into the weldability of an Ni-based superalloy, CM247LC, from the viewpoint of the liquation cracking behavior and its susceptibility. Metallurgical solutions to suppress the liquation-cracking susceptibility were derived via the visualization-based Varestraint test, and the possibility of liquation crack-free welding was explored by employing pre-weld heat treatments and laser beam welding. The alloy that was subjected to aging treatment exhibited the lowest liquation-cracking susceptibility (liquation cracking temperature range: 66 K), while the as-cast alloy specimen exhibited the highest liquation-cracking susceptibility (liquation cracking temperature range: 620 K). The metallurgical mechanisms of the liquation cracking susceptibility of as-cast CM247LC weld were elucidated via microstructural analyses and thermodynamic calculations. The suppressed liquation cracking susceptibility of the aged CM247LC can be attributed to the MC-type carbide fraction and homogenized matrix phase, as compared with those of as-cast CM247LC. The aged CM247LC specimen was subjected to gas tungsten arc welding to validate its minimal liquation-cracking susceptibility. The results confirmed the suppression of liquation cracking, due to the low susceptibility of the specimen. However, crackfree welds could not be obtained. Finally, metallurgically sound welds without liquation cracks were successfully obtained via laser beam welding. The outcomes of the present study will facilitate the generation of electric power from fossil fuels via a clean and efficient gas turbine-based power generation cycle.

Laser beam welding with a hybrid laser system

2000 ◽  
Author(s):  
G. Reinhart ◽  
J. Härtl ◽  
C. Lehner
Keyword(s):  
Laser Beam ◽  
Laser System ◽  
Laser Beam Welding ◽  
Hybrid Laser System

Autonomous manufacturing: Planning and control in laser beam welding

1996 ◽  
Author(s):  
S. Kaierle ◽  
M. Dahmen ◽  
B. Fürst ◽  
J. Kittel ◽  
E. W. Kreutz ◽  
...  
Keyword(s):  
Laser Beam ◽  
Laser Beam Welding ◽  
Manufacturing Planning ◽  
Planning And Control ◽  
Manufacturing Planning And Control ◽  
And Control

Integration of Robust Design and Simulation to Predict Optimum Parameters for Laser Beam Welding

2006 ◽  
Vol 39 (1) ◽  
pp. 24
Author(s):  
K. Manonmani ◽  
N. Murugan
Keyword(s):  
Laser Beam ◽  
Robust Design ◽  
Laser Beam Welding ◽  
Optimum Parameters

Enabling Rewards for Reinforcement Learning in Laser Beam Welding processes through Deep Learning

2020 ◽  
Author(s):  
Markus Schmitz ◽  
Florian Pinsker ◽  
Alexander Ruhri ◽  
Beibei Jiang ◽  
Georgij Safronov
Keyword(s):  
Deep Learning ◽  
Reinforcement Learning ◽  
Laser Beam ◽  
Laser Beam Welding ◽  
Welding Processes
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