Investigations on microstructural characteristics and mechanical properties of 316 L stainless steel welded joints using nickel coated filler material by gas tungsten arc welding

Abstract

Gas Tungsten Arc Welding (GTAW) process finds broad range of newlineapplications in various sectors such as petroleum industries, manufacturing newlineindustries, automobiles, refineries and construction industries due to its newlinecapability of high quality weld. GTAW is one of the prominent welding newlinetechnique which employing an arc between non consumable electrode and newlinework metal to weld the sections. Moreover, welding is an essential feature on newlineany kind of product; therefore this research mainly focuses on the welding of newlinemetals through GTAW. On the other hand, fast growing and modernization of newlineindustries creates the new challenges to join the metal and requires the newlinesufficient strength on weldments to warrant their performance. Hence, the newlinenecessity of modifications in the conventional GTAW process is also newlineunavoidable. Although, micro structural and mechanical properties of the newlinewelding are mainly depend on the type of filler material, filler coating and newlineelectrical parameters. The existing modified filler metals with flux coatings newlineused in GTAW are generally accompanied with more complications. newlineTherefore it is essential to suppress complications and enhance the welding newlinestrength which significantly depends on filler metals properties. newlineHence in order to overcome the difficulties existing in filler metal newlineand its coating, simple and prominent metal coating method such as newlineelectroplating technique is prescribed in this research. Also, previous GTAW newlinecharacteristics are normally accompanied with lesser strength and poor micro newlinestructural properties. Therefore, it is very essential to enhance the mechanical newlinestrength and a micro structural property which is majorly deplanes on the newlinefiller material coating and type of filler material. newline