Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 18 (2019) 3556–3565 www.materialstoday.com/proceedings 2214-7853 © 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the 9th International Conference of Materials Processing and Characterization, ICMPC-2019 ICMPC-2019 Process Optimization of Friction Stir Welded AA7XXX and Steel With Different Preheating Conditions Prashant S Humnabad a and M S Ganesha Prasad b a Assistant Professor, Department of Mechanical Engineering, Sir M Visvesvaraya Institute of Technology, Bengaluru, Karnataka, India. b Dean, Professor and Head, Department of Mechanical Engineering, New Horizon College of Engineering, Bengaluru, Karnataka, India. Abstract The joining process where melting of contacting edges or surfaces won’t takes place and joints are formed without adding any additional filler material, but pressure is applied along weld line can be referred as Solid-State-Welding. Joining of ferrous to ferrous or ferrous to non-ferrous materials is the current requirement for a wide range of automobile, aviation and other industrial applications. Joining of aluminum alloy and steel in case of car body or chassis needs development of efficient, reliable and cost effective method of joining process. Since, both the materials have different characteristics and must remain unchanged as far as possible after joint is achieved. The present paper introduces joining Aluminum-7xxx and Steel plates of thickness 04 mm by Friction Stir Welding process with different preheating conditions. ANOVA analysis on the L9 orthogonal array with three factors was performed and results indicate that among the parameters considered (i.e., the tool rotational speed, traverse speed, and preheating temperature), the most significant parameter on the weld quality is the tool traverse speed, followed by preheating temperature and rotational speed. © 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the 9th International Conference of Materials Processing and Characterization, ICMPC-2019 Keywords: Type your keywords here, separated by semicolons ; Corresponding author. Tel.: +91-9611501012 E-mail address: prashant.humnabad@gmail.com