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    Micro-alloying and surface texturing of Ti-6Al-4V alloy by embedding nanoparticles using gas tungsten arcwelding

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    Publication date
    2020-03-31
    Author
    Cooke, Kavian O.
    Shar, Muhammad A.
    Hussain, S.
    Keyword
    Nanoparticles
    Surface hardening
    Gas tungsten arc welding
    Surface melting and alloying
    Rights
    (c) 2020 The Authors. This is an Open Access article distributed under the Creative Commons CC-BY license (https://creativecommons.org/licenses/by/4.0/)
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Titanium alloy Ti-6Al-4V is known for both its excellent mechanical properties and its low surface hardness. This study explores a two-step process for depositing a hard nanocrystalline coating onto the surface of the Ti-alloy, followed by surface melting, which embeds hard nanoparticles into a thin surface layer of the alloy. The treated surface layer was studied using X-ray diffraction, scanning electron microscopy, and Vicker's micro-hardness testing. The results of the study show that the surface of the Ti-6Al-4V alloy can be successfully hardened by embedding nanosized Al2O3 particles into the surface using gas tungsten arc welding to melt the surface of the material. Surface melting the Ti-6Al-4V alloy with a 50A welding current produced the maximum microhardness of 701 HV0.2kg. The micro-hardness of the treated surface layer decreased with the increasing size of the nanoparticles, while the roughness of the surface increased with the increasing welding current. The heat input into the surface during the surface melting process resulted in the formation of various intermetallic compounds capable of further increasing the hardness of the Ti-6Al-4V surface.
    URI
    http://hdl.handle.net/10454/18197
    Version
    Published version
    Citation
    Cooke KO, Shar MA and Hussain S (2020) Micro-alloying and surface texturing of Ti-6Al-4V alloy by embedding nanoparticles using gas tungsten arcwelding. Journal of Manufacturing and Materials Processing. 4(2): 29.
    Link to publisher’s version
    https://doi.org/10.3390/jmmp4020029
    Type
    Article
    Collections
    Engineering and Informatics Publications

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