Surface effect of laser power on microstructural evolution and hardness behaviour of titanium matrix composites

Musibau O. Ogunlana, Esther T. Akinlabi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


In this paper, Titanium alloy (Ti6A14V) powder and boron carbide (B4C) powder metal matrix composites (MMCs) were embedded on titanium alloy (Ti6A14V) substrate using laser metal deposition (LMD). The laser power was varied between 800 W and 2400 W at an interval of 200 W while all other processing parameters were kept constant. The maximum capacity of the laser system is 3.0 KW which provides beam size of 4 mm for the control characterization of the deposited samples. The microstructural properties of the deposited samples were profound with α and β (intermetallic phase of α+β) of titanium alloy and boron carbide particles. The optical microscope (OM) was employed to characterise the grain sizes and microstructures. The microhardness were characterized using the Vickers' hardness indenter in which the microhardness of the composites revealed an increase in the samples as the laser power increases. The hardness were observed to be between 371Hv and 471Hv for the cladded samples when compared to the substrate with approximately 360Hv.

Original languageEnglish
Title of host publicationWCE 2016 - World Congress on Engineering 2016
EditorsS. I. Ao, S. I. Ao, Len Gelman, S. I. Ao, Len Gelman, David W.L. Hukins, Andrew Hunter, Alexander M. Korsunsky
PublisherNewswood Limited
Number of pages7
ISBN (Electronic)9789881404800
Publication statusPublished - 2016
EventWorld Congress on Engineering 2016, WCE 2016 - London, United Kingdom
Duration: 29 Jun 20161 Jul 2016

Publication series

NameLecture Notes in Engineering and Computer Science
ISSN (Print)2078-0958


ConferenceWorld Congress on Engineering 2016, WCE 2016
Country/TerritoryUnited Kingdom


  • Boron carbide
  • Laser metal deposition
  • Laser power
  • Metal matrix composites
  • Microhardness
  • Microstructure
  • Titanium alloy

ASJC Scopus subject areas

  • Computer Science (miscellaneous)


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