Heat input plays an important role in mechanical, metallurgical and other properties like corrosion resistance of weld in the fabrication industry. Although there are so many problems associated with the welding of austenitic stainless steel but inter granular corrosion is most critical one of them. 21% Chromium 13% Nickel Stainless Steel is used for various applications at elevated temperatures above 700o C such as the catalytic convertors, nuclear industry and automotive exhaust systems and in pulverized coal burner nozzles of coal fired thermal plants due to supposition that it is...

Ultrasonic machining is one of the most widely used non-traditional machining processes for the machining of non-conductive, brittle materials including glass, ceramics, carbides, and graphite. Ultrasonic machining is an abrasive process, and material removal is purely mechanical. The process does not cause heat affected zone and any chemical or electrical alterations on work piece surface. It does not change the metallurgical, chemical or physical properties of the work pieces. Ultrasonic machine four different mechanisms are responsible for removal of material from the work surface....