Microstructure and Tribological Performance of HVAF-Sprayed Ti-6Al-4V Coatings

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Owoseni, Tunji A.Högskolan Väst,Avdelningen för produktionssystem (PS),Kwara State University, Ilorin (NGA),KAMPT (author)

Microstructure and Tribological Performance of HVAF-Sprayed Ti-6Al-4V Coatings

Article/chapterEnglish2023

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MDPI,2023
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LIBRIS-ID:oai:DiVA.org:hv-21055
https://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-21055URI
https://doi.org/10.3390/coatings13111952DOI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

CC BY 4.0This article belongs to the Special Issue Mechanical Properties and Tribological Behavior of Alloy/Coatings
Ti-6Al-4V is a widely used titanium alloy in aviation and bio/chemical applications for its attractive mechanical and corrosion resistance properties. The use of Ti-6Al-4V as a coating for repair purposes through thermal spray techniques provides a unique productivity opportunity. A repair coating must be dense to provide the required in-service functionalities, such as resistance to wear. The High Velocity Air Fuel (HVAF) thermal spray technique deposits dense coatings with reduced concern for oxide inclusions. This work presents an investigation of the microstructure, dry sliding, and solid particle erosive wear performance of four different coatings engineered through the configuration of the nozzle of an HVAF spray gun, based on the length of the nozzle and the size of the nozzle exit. A long nozzle length and wide nozzle exit mean increased inflight dwell time and reduced average inflight temperature for the sprayed particles, respectively—a reversed configuration means the opposite. The tested coatings showed a porosity of less than 2%. The sliding and erosion wear performance of the densest of the coatings compares to that of the bulk material tested under the same conditions. Electron microscopy was used to investigate the driving mechanisms for the performance of the respective coatings. The implications of the results are discussed for the potential adoption of HVAF-sprayed coatings in metal component repair.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Materialteknik Bearbetnings-, yt- och fogningsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Manufacturing, Surface and Joining Technology hsv//eng
Ti-6Al-4V; HVAF thermal spray; sliding wear; erosion wear; microstructure
Production Technology
Produktionsteknik

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Ciudad de Lara, IreneUniversity West, Trollhättan (SWE) (author)
Mathiyalagan, SribalajiHögskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT(Swepub:hv)srimat (author)
Björklund, Stefan,1969-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT(Swepub:hv)tsb (author)
Joshi, Shrikant V.,1960-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT(Swepub:hv)shrjos (author)
Högskolan VästAvdelningen för produktionssystem (PS) (creator_code:org_t)

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In:Coatings: MDPI13:11, s. 1-152079-6412

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