Experimental Investigation on Process Parameters of Dissimilar Double-Layered Wire Produced by Modified Friction Stir Extrusion Process

Subject Areas : metal forming

Masoud  Yavari Nouri ¹ (Department of Mechanical Engineering, University of Birjand, Iran)
S. M. Hossein  Seyedkashi ² (Mechanical engineering department, University of Birjand)
Moosa  Sajed ³ (Department of Mechanical Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran)

Received: 2020-10-04 Accepted : 2021-03-14 Published : 2021-09-01

Keywords: Liquid penetrant testing, Friction Stir Extrusion, Crack, Double-layered wire, Adhesion strength,

Abstract :

In this paper, a new production method of aluminium/steel double-layered wire is proposed using a modified friction stir extrusion process. The core and coating were made of St37 steel and aluminium alloy, respectively. For extruded specimens, the effects of the main process parameters including tool rotational speed and feed rate were investigated on adhesion strength and surface cracks. The tool rotational speed was studied at two levels of 300 and 600 rpm, and the feed rate at two levels of 4 and 12 mm/min. Pull-out test was carried out using a tensile test machine to evaluate the adhesion strength. Surface cracks were evaluated by the liquid penetrant test. The results suggest that the modified friction stir extrusion process can be used successfully to produce dissimilar double-layered wires. With the right combination of tool rotational speed and feed rate levels, a dissimilar double-layered wire can be produced with a high adhesion strength and good surface quality. No cracks were observed in specimens produced with the feed rate of 12 mm/min and rotational speed of 600 rpm. The maximum adhesion strength was 2867.13 N that was achieved with a tool rotational speed of 300 rpm and feed rate of 12 mm/min.

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