Call For Paper Volume:4 Issue:10 Oct'2017 |

Effect of Welding Parameters on Tensile Strength of a Mild Steel Specimen using Response Surface Method

Publication Date : 10/07/2015



Author(s) :

K. R. Jagtap , A. R. Deshpande , M. S. Rojekar.


Conference Name :
4th International Conference on Recent Trends in Engineering & Technology(ICRTET-2015) July 2-4,2015 Organized by SNJB's KBJ College of Engineering,Chandwad,Nashik,Maharashtra,India



Abstract :

In present work the effect of shielded metal arc welding (SMAW) process parameters on ultimate tensile strength (UTS) was investigated. The parameters used for the study were welding current, wire feed rate and number of welding passes. The correlations between the welding parameters and ultimate tensile strength were established by central composite rotatable design (CCRD) with quadratic model. The correlation coefficients found close to 0.9 signifies the reliability of selected model. Hence the model can be effectively used for predicting the response within the domain of the welding parameters. Analysis of variance (ANOVA) was used to predict the impact of welding parameters on the response. It can be seen that UTS mostly affected by higher order of welding current (nearly 40-60% contribution) followed by higher order of number of welding passes (nearly 30% contribution). From the experimental results, it is observed that UTS increases up to its maximum value for certain increase in all process parameters. Further increase in parameter value, decrease in UTS value was observed. An empirical relation for UTS was derived using the experimental results.


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