• G Dileep
• G Narasa Raju

Chrome alloy is a high carbon steel which is manufactured using chromium and molybdenum elements. The molybdenum element enhances strength and higher working temperatures while the chromium provides outstanding corrosion resistance and oxidation. This alloy steels have found applications in oil, gas, energy and automotive industries. In this present work, EN31 Chrome alloy steel joints were prepared by varying process parameters such as current, voltage, weld speed in TIG welding process. Tensile testing, impact testing and Rockwell hardness testing were chosen for destructive testing, where in radiography testing was chosen for non-destructive testing. Optimization techniques like Taguchi and Taguchi Grey Relational Analysis are also applied to know the process parameters influence on the mechanical properties of the weld part in order to achieve improved mechanical properties. The ANOVA also carried out to know the percentage contribution of process parameters. The influence of the process parameters and presence of defects will be examined visually and also through radiography tests. It can be concluded from this work that different types of defects such as lack of penetration, root undercut were originated in three weld joints. The quality of the weld was evaluated in terms of Tensile Strength, Hardness and Impact Strength of the weld specimens

Defect Analysis, Mechanical Characterization, TIG Welded EN31 Alloy Steel.

"DEFECT ANALYSIS AND MECHANICAL CHARACTERIZATION OF TIG WELDED EN31 ALLOY STEEL JOINTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.134-146, June 2019, Available :http://www.jetir.org/papers/JETIR1907O22.pdf

"DEFECT ANALYSIS AND MECHANICAL CHARACTERIZATION OF TIG WELDED EN31 ALLOY STEEL JOINTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp134-146, June 2019, Available at : http://www.jetir.org/papers/JETIR1907O22.pdf