TY - JOUR ID - 101157 TI - Effect of Tool Rotational Speed on the Tensile and Microstructural Properties of Friction Stir Welded Different Grades of Stainless Steel Joints JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Ethiraj, N. AU - Sivabalan, T. AU - Sivakumar, B. AU - Vignesh Amar, S. AU - Vengadeswaran, N. AU - Vetrivel, K. AD - Department of Mechanical Engineering, Dr.M.G.R Educational and Research Institute, Madhuravoyal, Chennai, India Y1 - 2020 PY - 2020 VL - 33 IS - 1 SP - 141 EP - 147 KW - Friction Stir Welding KW - microhardness KW - Microstructural Properties KW - Stainless steel KW - Tool Rotational Speed KW - tensile properties DO - 10.5829/ije.2020.33.01a.16 N2 - Friction stir welding is a relatively new solid state joining process, which is suitable for welding similar and dissimilar materials.  The present research work concentrates on the effect of tool rotational speed on the tensile, microstructural properties and microhardness of the friction stir welded joints of different grades of austenitic stainless steel sheets. Four different tool rotational speeds are used in the experimentation while the other process parameters like traversing speed and the tool tilt angle are kept constant. The tensile testing, micrography and microhardness measurements were carried out in the welded samples. It is observed from the results of tensile testing that the joint made at the tool rotational speed of 1320 rpm has the maximum strength among the experimented speeds. The measured microhardness values at heat affected zone and parent metal zone have shown higher hardness than the weld zone. Fine and equi-axed grains are observed in the welded region at all experimented speeds with a negligible amount of transformation of austenite into martensite. These results have impact on the development of welding procedure for dissimilar stainless steel friction stir welding process. UR - https://www.ije.ir/article_101157.html L1 - https://www.ije.ir/article_101157_970ab07caa82fcb5047c817eb86173fd.pdf ER -