Grain size of friction stir welded AA6061 sheets (100 x 75 x 3 mm)

Published: 16 August 2022| Version 1 | DOI: 10.17632/jt96j3htfj.1


In this version, we share the experimental data of friction stir welded aluminum sheets and their quality evaluation by determining the grain size at the nugget zone. Following are the details of the experiment: (1) Base material: Aluminum alloy, AA6061. Sheet dimension: 100 x 75 x 3 mm (2) Welding is performed on the as-received sheets (3) Welding machine: Vertical Milling Machine (BFW, VF 3.5) (4) Welding parameters: Tool rotational speed, Welding speed, and Tool tilt angle (5) Weld characterization: (a) Specimen cut from weld: 25 mm × 10 mm, (b) Polishing, (c) Microscopic imaging, and (d) Line intercept method to calculate grain size


Steps to reproduce

Procedure followed for determination of grain size: (1) Cold mounting: Transverse weld cross-section is the face during mounting (2) Polishing: Emery papers ranging from 220 to 4000 grit sizes, and diamond paste. All were performed in a Sample Polishing and Grinding Machine (3) Etching: Keller’s reagent (hydrofluoric acid, hydrochloric acid, nitric acid, and distilled water in ratio of 2:3:5:190) with a holding time of 180 seconds. (4) Microscopic imaging: Inverted metallurgical microscope (Leica, BFC295) at 20X zoom (5) Microscopic image analysis: Using DIGIMIZER software and Line intercept method


Indian Institute of Technology Kharagpur


Friction Stir Welding, Grain Size, Solid-State Welding, Advanced Manufacturing