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

6th Global Conference on Materials Science and Engineering

Kondapalli, S.P.^1

Department of Mechanical Engineering, Anil Neeukonda Institute of Technology and Sciences, India^1

关键词: Box-Behnken design;    Confidence levels;    Empirical relations;    Input and outputs;    Interaction effect;    Micro-plasma arc welding;    Response surface method;    Statistical software;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/283/1/012007/pdf
DOI  :  10.1088/1757-899X/283/1/012007

来源: IOP

【 摘 要 】

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.