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dc.contributor.authorMaharjan, Nirojen_US
dc.contributor.authorBhowmik, Ayanen_US
dc.contributor.authorKum, Cunwaien_US
dc.contributor.authorHu, Jiakunen_US
dc.contributor.authorYang, Yongjinen_US
dc.contributor.authorZhou, Weien_US
dc.identifier.citationMaharjan, N., Bhowmik, A., Kum, C., Hu, J., Yang, Y. & Zhou, W. (2021). Post-processing of cold sprayedTi-6Al-4V coatings by mechanical peening. Metals, 11(7), 1038-.
dc.description.abstractCold spray is an emerging additive manufacturing technology used in the aerospace industry to repair damaged components made of expensive metal alloys. The cold sprayed layer is prone to surface integrity issues such as high porosity and inadequate bonding at the substrate-coating interface, which may cause premature failure of the repaired component. This study explored the use of mechanical peening as a post-processing method to improve the surface integrity of the cold sprayed component by modifying mechanical properties near the surface. Two mechanical peening processes, deep cold rolling (DCR) and controlled hammer peening (CHP), were utilized to improve cold sprayed Ti-6Al-4V coating on the Ti-6Al-4V substrate. Experimental results indicate that DCR and CHP increase the strength of the bond between the coating and substrate due to introduction of compressive residual stresses. In addition, porosity is also reduced by as much as 71%. The improvement is attributed to both the compacting effect of peening processes and the increment in the volume fraction of deformed regions.en_US
dc.rights© 2021 The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( 4.0/).en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titlePost-processing of cold sprayedTi-6Al-4V coatings by mechanical peeningen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.description.versionPublished versionen_US
dc.subject.keywordsCold Sprayen_US
dc.subject.keywordsDeep Cold Rollingen_US
dc.description.acknowledgementThe funding for this study was provided by Advanced Remanufacturing and Technology Centre (ARTC), Singapore under Core Research Project Cycle 6 (CRP6–C19_01_ARTC).en_US
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