Optimization of Operating Parameters of Tig Welding of Incoloy (800ht) through Response Surface Methodology
K Raju1, K Venkata Subbaiah2

1K.Raju*, Mechanical Engineering Department, Government Polytechnic, Srikakulam, India.
2Prof K Venkata Subbaiah, Mechanical Engineering Department, Andhra University, Visakhapatnam, India.
Manuscript received on January 12, 2020. | Revised Manuscript received on January 22, 2020. | Manuscript published on February 10, 2020. | PP: 775-784 | Volume-9 Issue-4, February 2020. | Retrieval Number: C8830019320/2020©BEIESP | DOI: 10.35940/ijitee.C8830.029420
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: In the present study, Response Surface Methodology (RSM) is implemented to determine optimum process variables of TIG welding of Incoly-800HT sheets. Voltage, Welding current and speed of welding are considered as factors. Ultimate tensile strength at room temperature, yield strength at room temperature, ultimate tensile strength at 7500C, yield strength at 7500C and toughness are considered as responses. The Design of Experiment based on central composite response surface design, experimenting is formulated using the Design Expert 12 software. Grey Relational Analysis (GRA) carried on the responses and grey relational coefficients are calculated. The grey relational coefficients are subjected to Principal Component Analysis (PCA) using PAST 3.26 software that transforms the five responses into a single response. The optimization of parameters is carried by Response Surface Methodology and contribution by each input parameter is estimated by ANOVA (Analysis of Variance).
Keywords: TIG Welding, Design of Experiment, GRA, PCA, RSM and ANOVA.
Scope of the Article: Welding Technology