Analysis of Filler Metal Composition on Weld Dilution of Austenitic Stainless Steel by TIG and MIG Welding
Main Article Content
Abstract
Austenitic stainless steels are very important material and extensively used for various applications in fertilizer industry, petrochemical industry, nuclear industry and food industry. Austenitic stainless steel 316L alloyed with small percentage of nitrogen is called 316LN. 316LN is widely used only in nuclear applications and it is also called high temperature steels. This nitrogen alloyed steels 316LN will work at higher temperature environment along with radiation environment without losing its properties. The welding of this 316LN steel poses challenge due to problems like sensitization to inter granular corrosion, stress corrosion cracking and even hot cracking. Selecting the type of welding and filler material is more important for welding the 316LN austenitic stainless steel (SS). In this paper SS 316LN material is being welded with TIG and MIG welding. Three pairs of SS 316LN plates were used for experimental work. Filler electrode ER316L is used for TIG and MIG121 is used for MIG welding. After the welding process, hardness test, tensile test and bending test were performed to check the mechanical properties of the specimen. Microstructure of the specimen is observed at the weld region. The results show that the welded joint is stronger than the base material in TIG welding process compared to MIG welding, combination of TIG and MIG welding. Hardness values are observed to be higher at the weld region than the base material. Tensile test results show that the ultimate tensile strength of welded plate is greater than that of base materials and TIG welding process is better than other two processes. The microstructure images show that there is a continuous and uniform welding and the joint is defect free from cracks.
Article Details
Issue
Section
Articles
Authors who publish with this journal agree to the following terms: a. Authors retain copyright and grant the journal right of first publication, with the work two years after publication simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. b. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. c. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).