Abstract

This MDPI book is the printed copy edition of the Special Issue (SI) 'Friction Stir Welding and Processing in Alloy Manufacturing' that was previously published online in the open access journal Metals. The book collects 10 papers with the latest developments in the fields of FSW, friction stir spot welding (FSSW), and friction stir processing (FSP), written by well-known researchers who have contributed significantly to advances in computational modeling, numerical simulation, and material characterization in the field. Each contribution has been subjected to peer review by three experts in the field in order to monitor the research quality of the outcome.

Highlights

  • Friction Stir Welding (FSW) uses a tool with a high rotating speed which moves forward between the pieces to be joined and generates heat

  • In the case of S1, a groove appears along the weld seam and seriously flashes on both sides of the weld

  • A 3 mm-thick Al 5083-O alloy was used on the top and 1.2 mm-thick dual phase (DP) 590 steel was on the bottom

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Summary

Introduction

Friction Stir Welding (FSW) uses a tool with a high rotating speed which moves forward between the pieces to be joined and generates heat. The main function of the tool (consisting of pin and shoulder) is to mix the work piece material and to generate heat by friction. The final properties of friction stir welds depend on factors such as the process parameters (advancing and rotating speed), the tool design and the tool tilt angle [1–3]. The tool tilt angle affects the material flow during the weld and the heat generation. A non-zero tilt angle ensures the contact among the tool shoulder and the work piece; it facilitates the flow of the material around the tool. An optimal tool tilt angle guarantees that the tool shoulder imprisons the deformed material and transports it proficiently from the front edge to the rear side of the pin [6]

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