Optimization of Welding Process Parameters for 9Cr-1Mo Steel Using RSM and GA
TL;DR: In this paper, a second-order response surface model was developed for predicting the response for the set of given input variables, and numerical and graphical optimization was performed using RSM to obtain the target depth of penetration (DOP) and heat-affected zone (HAZ) width using desirability approach.
Abstract: Optimization of A-TIG welding process parameters for 9Cr-1Mo steel has been carried out using response surface methodology (RSM) and genetic algorithm (GA). RSM has been used to obtain the design matrix for generating data on the influence of process parameters on the response variables. A second-order response surface model was developed for predicting the response for the set of given input variables. Then, numerical and graphical optimization was performed using RSM to obtain the target depth of penetration (DOP) and heat-affected zone (HAZ) width using desirability approach. Multiple regression models were developed based on the generated data, and then the models were used in GA to determine the optimum process parameters for achieving the target DOP and HAZ width. GA-based models employed two different selection processes. Both the RSM- and GA-based models suggested a number of solutions in terms of process parameters, and the identified solutions were validated by experiments. GA-based model employ...
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Journal Article•
TL;DR: This book by a teacher of statistics (as well as a consultant for "experimenters") is a comprehensive study of the philosophical background for the statistical design of experiment.
Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON
13,333 citations
TL;DR: In this paper, the influence of process parameters such as welding current (I), welding speed (S), and flux coating density (F) on different aspects of weld bead geometry for example depth of penetration (DOP), bead width (BW), depth to width ratio (D/W), and weld fusion zone area (WA) were investigated by using the central composite design.
Abstract: In the present work, the influence of process parameters such as welding current (I), welding speed (S), and flux coating density (F) on different aspects of weld bead geometry for example depth of penetration (DOP), bead width (BW), depth to width ratio (D/W), and weld fusion zone area (WA) were investigated by using the central composite design (CCD). 9–12% Cr ferritic stainless steel (FSS) plates were welded using A-TIG welding. It was observed that all input variables have a direct influence on the DOP, BW, and D/W. However, flux coating density has no significant effect on WA. Mathematical models were generated from the obtained responses to predict the weld bead geometry. An optimized DOP, BW, D/W, and WA of 6.95 mm, 8.76 mm, 0.80, and 41.99 mm2, respectively, were predicted at the welding current of 213.78 A, the welding speed of 96.22 mm/min, and the flux coating density of 1.99 mg/cm2. Conformity test was done to check the practicability of the developed models. The conformity test result...
58 citations
TL;DR: An integrated optimization approach by combining Kriging model and GA is proposed to optimize process parameters in hybrid laser-arc welding as mentioned in this paper, where the effects of process parameters on weld geometry are analyzed.
Abstract: It is of great significance to select appropriate welding process parameters for obtaining optimal weld geometry in hybrid laser-arc welding. An integrated optimization approach by combining Kriging model and GA is proposed to optimize process parameters. A four-factor, five-level experiment using Taguchi L 25 is conducted considering laser power (P), welding current (A), distance between laser and arc (D) and traveling speed (V). Kriging model is adopted to approximate the relationship between process parameters and weld geometry, namely depth of penetration (DP), bead width (BW) and bead reinforcement (BR). The constructed Kriging model was used for parameters optimization by GA to maximize DP, minimize BW and ensure BR at a desired value. The effects of process parameters on weld geometry are analyzed. Microstructure and micro-hardness are also discussed. Verification experiments demonstrate that the obtained optimum values are in good agreement with experimental results.
56 citations
TL;DR: A novel parameter-free surrogate building algorithm using Adaptive Neuro Fuzzy Inference System (ANFIS) is presented to provide an intelligent and robust technology to optimally estimate the configuration of ANFIS along with Sobol-based fast sample size determination (SSD) methodology.
Abstract: KERNEL – A novel parameter-free surrogate building algorithm using Adaptive Neuro Fuzzy Inference System (ANFIS) is presented to provide an intelligent and robust technology to optimally es...
49 citations
TL;DR: Diamond-like carbon thin film coatings are extensively used in manufacturing, medical and aerospace industries due to their excellent tribological, mechanical, optical and biological properties as mentioned in this paper, and are used in many applications.
Abstract: Diamond-like carbon thin film coatings are extensively used in manufacturing, medical and aerospace industries due to their excellent tribological, mechanical, optical and biological properties. Du...
39 citations
References
More filters
Journal Article•
TL;DR: This book by a teacher of statistics (as well as a consultant for "experimenters") is a comprehensive study of the philosophical background for the statistical design of experiment.
Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON
13,333 citations
Book•
01 Jul 2001
523 citations
"Optimization of Welding Process Par..." refers background in this paper
...High-temperature creep strength, adequate corrosion resistance, and longterm microstructural stability of this alloy has made this material suitable for steam generator applications [1]....
[...]
01 Jan 2011
TL;DR: In this paper, a comparison of GA performance in solving travelling salesman problem (TSP) using different parent selection strategy is presented. And the results reveal that tournament and proportional roulette wheel can be superior to the rank-based Roulette wheel selection for smaller problems only and become susceptible to premature convergence as problem size increases.
Abstract: A genetic algorithm (GA) has several genetic operators that can be modified to improve the performance of particular implementations. These operators include parent selection, crossover and mutation. Selection is one of the important operations in the GA process. There are several ways for selection. This paper presents the comparison of GA performance in solving travelling salesman problem (TSP) using different parent selection strategy. Several TSP instances were tested and the results show that tournament selection strategy outperformed proportional roulette wheel and rank- based roulette wheel selections, achieving best solution quality with low computing times. Results also reveal that tournament and proportional roulette wheel can be superior to the rank- based roulette wheel selection for smaller problems only and become susceptible to premature convergence as problem size increases.
374 citations
"Optimization of Welding Process Par..." refers result in this paper
...This is also in agreement with the literature report that tournament selection outperformed the roulette wheel selection process [23]....
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TL;DR: In this paper, the authors compared the performance of response surface methodology (RSM) and genetic algorithm (GA) in the optimization of a GMAW welding process with a relatively small number of experiments.
162 citations
"Optimization of Welding Process Par..." refers background in this paper
...However, literature is very limited on the comparison of the performance of RSM and GA in welding process optimization [16]....
[...]
Journal Article•
TL;DR: In this article, the A-TIG process and its operating characteristics are presented and a mechanism is proposed by which the unique depth of weld pool penetration is achieved, and the performance in comparison to the conventional TIG plasma processes is highlighted and the potential areas of application are identified.
Abstract: This paper presents details of the A-TIG process and its operating characteristics. A mechanism is proposed by which the unique depth of weld pool penetration is achieved. Whilst there are undoubted significant productivity benefits to be gained, its performance in comparison to the conventional TIG plasma processes is highlighted and the potential areas of application are identified.
102 citations
"Optimization of Welding Process Par..." refers background in this paper
...A-TIG welding process has been reported to overcome the above limitations [2]....
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