Optimization of tensile strength for heat treated micro-alloyed steel weldment

Welding and post weld heat treatment process variables play important roles in determining the quality of welds. Thus, to produce welded joints of desired microstructure with the requisite mechanical properties for optimal performance in service, the need for the analysis of the process variables re...

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Bibliographic Details
Main Authors: Adzor, S.A., Nwaeju, C.C., Edoziuno, F.O.
Format: Conference Proceeding
Language:English
Subjects:
Heat treatment
Micro-alloyed steel
Modeling
Optimization
Tensile strength
Welding
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Summary:Welding and post weld heat treatment process variables play important roles in determining the quality of welds. Thus, to produce welded joints of desired microstructure with the requisite mechanical properties for optimal performance in service, the need for the analysis of the process variables requiring optimization to determine their influence on the response (output) is very vital. In this study, the optimal design approach was used to optimize the main influencing process variables of welding current, tempering temperature and holding time to determine their impact on the observable response (tensile strength). Through multiple regression analysis of the experimental data, the predicted response was expressed by the second-order polynomial equation in terms of coded values. The derived model was statistically analyzed to determine its significance and predictive capacity. The ANOVA results of the quadratic regression model used to fit the response showed that it is significant (P 
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2021.11.282