Multiscale modeling of electron beam and substrate interaction: a new heat source model

2015 ◽  
Vol 56 (2) ◽  
pp. 265-276 ◽  
Author(s):  
Wentao Yan ◽  
Jacob Smith ◽  
Wenjun Ge ◽  
Feng Lin ◽  
Wing Kam Liu
Keyword(s):  
Electron Beam ◽  
Heat Source ◽  
Multiscale Modeling ◽  
Source Model ◽  
Heat Source Model ◽  
Substrate Interaction

Heat source model for electron beam welding of nickel-based superalloys

2021 ◽  
Vol 63 (1) ◽  
pp. 17-28
Author(s):  
Torsten Jokisch ◽  
Nikolay Doynov ◽  
Ralf Ossenbrink ◽  
Vesselin Georgiev Michailov
Keyword(s):  
Electron Beam ◽  
Heat Source ◽  
Electron Beam Welding ◽  
Experimental Studies ◽  
Theoretical Models ◽  
Source Model ◽  
Beam Deflection ◽  
Prediction Algorithm ◽  
Model Parameters ◽  
Heat Source Model

Abstract An adapted heat source model is developed for transient thermal numerical analysis of electron beam welded nickel-based alloy with increased susceptibility to hot cracking. The model enables the consideration of heat redistribution due to beam deflection phenomena. The modeling concept is validated by the appropriate theoretical models and in addition, experimental studies especially performed for this purpose. Special attention is given to the calibration of heat source model parameters. The calibration procedure is based on a statistical approach involving a combination of novel analytical solutions and quasi-steady state finite element models. The model parameter field is statistically analyzed, and a prediction algorithm is developed using optimization algorithms from the six sigma theory. The reliability and practicability of the model is demonstrated by validation weldments. The work is dedicated to precisely calculating the temperature field in the high temperature region around the weld pool and thus to provide a more detailed explanation of the formation of hot cracks when welding turbine materials commonly used in industry and aircraft constructions.

Heat source model calibration for thermal analysis of laser powder-bed fusion

2020 ◽  
Vol 106 (7-8) ◽  
pp. 3367-3379 ◽  
Author(s):  
Shahriar Imani Shahabad ◽  
Zhidong Zhang ◽  
Ali Keshavarzkermani ◽  
Usman Ali ◽  
Yahya Mahmoodkhani ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Heat Source ◽  
Model Calibration ◽  
Source Model ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Heat Source Model ◽  
Powder Bed

Development of a new combined heat source model for welding based on a polynomial curve fit of the experimental fusion line

2016 ◽  
Vol 87 (5-8) ◽  
pp. 1985-1997 ◽  
Author(s):  
Junqiang Wang ◽  
Jianmin Han ◽  
Joseph P. Domblesky ◽  
Zhiyong Yang ◽  
Yingxin Zhao ◽  
...  
Keyword(s):  
Heat Source ◽  
Source Model ◽  
Fusion Line ◽  
Heat Source Model ◽  
Curve Fit ◽  
Polynomial Curve ◽  
Experimental Fusion
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