Effect of plasma arc welding variables on fusion zone grain size and hardness of AISI 321 austenitic stainless steel

In the present work, pulsed current microplasma arc welding is carried out on AISI 321 austenitic stainless steel of 0.3 mm thickness. Peak current, Base current, Pulse rate and Pulse width are chosen as the input variables, whereas grain size and hardness are considered as output responses. Respons...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-12, Vol.283 (1), p.12007
Main Author: Kondapalli, S P
Format: Article
Language:English
Subjects:
Adequacy
Austenitic stainless steels
Confidence intervals
Empirical analysis
Grain size
Hardness
Microplasmas
Plasma arc welding
Plasma jets
Pulse duration
Pulse rate
Pulsed current
Response surface methodology
Stainless steel
Statistical analysis
Variance analysis
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Summary:In the present work, pulsed current microplasma arc welding is carried out on AISI 321 austenitic stainless steel of 0.3 mm thickness. Peak current, Base current, Pulse rate and Pulse width are chosen as the input variables, whereas grain size and hardness are considered as output responses. Response surface method is adopted by using Box-Behnken Design, and in total 27 experiments are performed. Empirical relation between input and output response is developed using statistical software and analysis of variance (ANOVA) at 95% confidence level to check the adequacy. The main effect and interaction effect of input variables on output response are also studied.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/283/1/012007