Defect analysis and evaluation of mechanical properties of tig welded chrome alloy steel joints for high temperature applications.

Autor: Pydi, Hari Prasadarao, Pasupulla, Ajay Prakash, Vijayakumar, S., Indira, K. P.
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Zdroj: AIP Conference Proceedings; 7/11/2022, Vol. 2443 Issue 1, p1-10, 10p
Abstrakt: 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, 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. 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 two weld joints. The quality of the weld was evaluated in terms of Tensile Strength, Hardness and Impact Strength of the weld specimens. Optimum values in mechanical testing were obtained for the specimen-2 which was prepared with parameters of Current-135Amp, Voltage-22V, Welding speed-2.4m/min. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index