Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

On novel Copper Based Alloys Development via Friction Stir Alloying

Version 1 : Received: 22 April 2021 / Approved: 27 April 2021 / Online: 27 April 2021 (14:25:31 CEST)

How to cite: Moiduddin, K.; Siddiquee, A.N.; Abidi, M.H.; Mian, S.H.; Mohammed, M.K. On novel Copper Based Alloys Development via Friction Stir Alloying. Preprints 2021, 2021040727 (doi: 10.20944/preprints202104.0727.v1). Moiduddin, K.; Siddiquee, A.N.; Abidi, M.H.; Mian, S.H.; Mohammed, M.K. On novel Copper Based Alloys Development via Friction Stir Alloying. Preprints 2021, 2021040727 (doi: 10.20944/preprints202104.0727.v1).

Abstract

Friction stir alloying (FSA) of commercially pure Cu with Ni, Zn, and Mg is implemented in the current study. The successfully fabricated alloy structure has been scrutinized in terms of mechanical and micro-structural standpoints. Energy-dispersive X-ray spectroscopy revealed a uniform distribution of alloying elements and coalescence at the atomic level. The compositional and grain size heterogeneity is managed in the stir zone, which pave way for microstructural control using FSA. Thus, the present study carries significance for the development of novel materials whose fabrication requires temperature far below the melting point of base metals. Ultra-refinement of grains is found to accompany the alloying process, with ~ 440 nm being the smallest grain size. Maximum and average micro-hardness enhancement of 18.4 % and 6 % is observed for the fabricated alloy. Tensile properties have also been investigated and co-related with the micro-structural morphology. The shift towards grain bimodality has also been reported, which is a highly sought property in the present day, especially to overcome the strength-ductility trade-off.

Subject Areas

Copper alloy; friction stir alloying; macrostructure; material properties

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