Title

Synthesis Of Bulk Nanostructured Aluminum Alloy Component Through Vacuum Plasma Spray Technique

Keywords

Aluminum alloys; Nanostructured bulk component; Plasma spraying; Rapid solidification; Splat quenching

Abstract

The benefits of large-size engineering components with nanocrystalline structure (providing improved strength) are yet to be realized due to processing difficulties and associated grain growth problems. In this work, a free-standing bulk nanocrystalline structure of hypereutectic aluminum alloy (Al-21wt.%Si) has been fabricated through the vacuum plasma spray (VPS) forming technique using micron-size powder feedstock. Optical microscopy, scanning electron microscopy and transmission electron microscopy have been used to investigate the evolution of multi-scale microstructure as the result of rapid solidification in VPS forming process. The characterization implies the presence of nanosized eutectic Al-Si grains (25-100 nm) with uniformly distributed ultrafine primary silicon particles of submicron size. The effect of microstructural evolution on mechanical properties has been studied by tensile testing and microhardness measurement. A considerable improvement in ultimate tensile strength and hardness of the sprayed deposit has been observed in comparison with conventionally cast hypereutectic Al-17wt.%Si alloys. © 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Publication Date

12-1-2005

Publication Title

Acta Materialia

Volume

53

Issue

20

Number of Pages

5429-5438

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.actamat.2005.08.027

Socpus ID

27144456107 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/27144456107

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