Preprint Article Version 1 This version is not peer-reviewed

Characterization of Tool Degradation during Friction Stir Processing of 6061-T6 Aluminum Alloy Extrusions

Version 1 : Received: 15 August 2018 / Approved: 16 August 2018 / Online: 16 August 2018 (13:59:10 CEST)

How to cite: Netto, N.; Tiryakioglu, M.; Eason, P. Characterization of Tool Degradation during Friction Stir Processing of 6061-T6 Aluminum Alloy Extrusions. Preprints 2018, 2018080286 (doi: 10.20944/preprints201808.0286.v1). Netto, N.; Tiryakioglu, M.; Eason, P. Characterization of Tool Degradation during Friction Stir Processing of 6061-T6 Aluminum Alloy Extrusions. Preprints 2018, 2018080286 (doi: 10.20944/preprints201808.0286.v1).

Abstract

The diameter of a H13 steel tool with M6 threads and a pin diameter of 5.9 mm and a pin length of 5 mm was measured after each 25.4 mm length of friction stir processing (FSP) of 6061-T6 extrusions. The change in pin diameter with FSP time or distance did not exhibit any steady state and was found to have two distinct regions. Metallographic analysis of two tools subjected to FSP for 60 and 120 seconds showed that (i) threads fractured in early stages of FSP, (ii) a built-up layer formed between the threads, and (iii) threads progressively wore with processing time. The metallographic analysis of an embedded tool showed the presence of a fractured piece of the tool in the stir zone. These points are discussed in detail in the paper.

Subject Areas

Thread fracture; tool wear; Taylor Equation; Scanning Electron Microscopy

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