Open AccessProcess Variable Optimization of Cold Metal Transfer Technique in Cladding of Stellite-6 on AISI 316 L Alloy Using Grey Relational Analysis (GRA)
Author(s) -
Thinesh Babu Thiagarajan,
P. Sengottuvel
Publication year - 2021
Publication title -
annales de chimie, science des matériaux/annales de chimie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.158
H-Index - 29
eISSN - 1958-5934
pISSN - 0151-9107
DOI - 10.18280/acsm.450406
Subject(s) - stellite , materials science , cladding (metalworking) , grey relational analysis , indentation hardness , welding , process variable , composite material , response surface methodology , metallurgy , alloy , austenitic stainless steel , orthogonal array , corrosion , central composite design , taguchi methods , process (computing) , microstructure , mathematics , mathematical economics , machine learning , computer science , operating system
In this work, an attempt was made to identify the optimised parameter combination in cold metal transfer (CMT) cladding process of AISI 316 L austenitic stainless steel. cladding process was carried out using stellite 6 filler wire. Experiments were carried out based on L31 central composite design (CCD). Cladding was done with current, Voltage, torch angle and travel speed as input parameters. Quality of the clad was analysed by measuring depth of penetration, weld area, hardness of the clad surface, corrosion rate and clad interface thickness. Grey relation analysis was used to identify the optimised parameter combination. Trial number 18 was identified as the optimised parameter combination. The optimised input parameters are Welding Current 200 Amps, Voltage 19 V, Torch Angle 70⁰ and Welding Speed 150 m/min. ANOVA was used to identify the most influencing parameters on the overall multi-objective function and it was understood that the combined effect of torch angle, travel speed had a significant influence on the clad quality. Further investigation was carried out through an optimised set of parameters. The cladding experiment was conducted and their surface was investigated through clad profile, hardness of the cladded area, interface thickness of cladding region and corrosion rate.