Effect of heat input on the microstructure and mechanical properties of gas tungsten arc welded AISI 304 stainless steel joints

Effect of Post Weld Heat Treatment on the Microstructure and Mechanical Properties of a Submerged-Arc-Welded 304 Stainless Steel

“…However, if the delta ferrite in austenitic stainless steel is excessively present in the weld metal during SAW welding, embrittlement of the welded part may occur due to transformation into another brittle phase such as a sigma phase during post heat treatment. In order to solve these problems, it is important to investigate post-heat treatment process to control the content of delta ferrite and the harmful carbides [9]. Proper post-heat treatment can improve the mechanical properties by homogenizing the microstructure of the welded material and controlling the formation of beneficial and harmful phases [10][11][12][13].…”

Experimental Investigation on Thin Sheets of SS316L in Gas Tungsten Arc Welding Process

“…Stainless steel is a metallic alloy consist of the notable amount of chromium which induces the self healing property, and maximum carbon content of 1.2% (according to European Standard EN 10088) and other metal elements such as nickel and molybdenum [8]. Stainless steel has better joint efficiency, low fabrication cost and has efficiency in metal joining processes, and these qualities are very much considered for structural applications [1].…”

“…Stainless steel has better joint efficiency, low fabrication cost and has efficiency in metal joining processes, and these qualities are very much considered for structural applications [1]. Because of these properties, they have been utilized in spectrum applications such as rail coach manufacturing, automotive, civil constructions, nuclear reactor, thermal power plants, heat exchangers and chemical industries [1] [8]. Still, SS316L poses many difficulties in manufacturing especially in welding such as sensitization of weld pool area under high temperature which will lead to oxidation and hot cracking of weld metal while solidification.…”

Efeito Da Soldagem No Comportamento Mecânico Do Aço Inoxidável Aisi 304 Aplicando a Correlação Digital De Imagens

“…Estas dificuldades existem quando se estuda o comportamento mecânico de juntas soldadas. Segundo Galvis e Hormoza [3] e Kumar e Shahi [4] devido ao fato de a dissipação de calor neste processo acontecer principalmente por condução a partir da região onde ocorreu a fusão do metal consumível para o restante do material da junta soldada, são gerados gradientes térmicos na união. Durante o resfriamento esses gradientes provocam um tratamento termomecânico violento que inclusive causa deformações induzidas no material, segundo Chen et al [5] e consequentemente acarretam gradientes microestruturais e mecânicos.…”