Microstructural Characteristics and Hardness Property of Laser Cladded Ti and TiB2Nanocomposites on Steel Rail

V. I. Aladesanmi, O. S. Fatoba*, T. C. Jen, E. T. Akinlabi

*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

The laser cladding experiment was carried out on a two-powder loading hub laser machine at the Center for Scientific Innovation and Research, Pretoria, South Africa. Nanocomposites of Titanium and Titanium diboride was at ratio loaded and cladded on carbon steel surface. Metallurgical characterization of microscopic and macroscopic view was executed. The X-ray diffraction was taken with the PW1710 Philips diffractometer. XRD results of TiB2 rich samples reveals peak phase of cubic Titanium diboride, hexagonal Titanium, cubic alpha-Iron, tetragonal Iron 2 boride and hexagonal Titanium diboride. XRD of even mix sample revealed clad phases of hexagonal Titanium and orthorhombic Titanium diboride. XRD of Ti rich clad revealed phases of cubic gamma-Iron-austenite, hexagonal Titanium, hexagonal titanium diboride, cubic Khamrabaevite and hexagonal alpha-Titanium phases. Sample 3 showed good XRD phases that influenced the property of the composites. The working parameters of laser power were from 1250 W to 1500 W and scanning speed of 1.0 to 1.2. m/min. The analysis showed a microhardness response range of 781 HV to 1254 HV0.5.Interesting phases and structures have been seen in the microstructures of the admixed powders. Pores and colouration pigments are vital factors influencing the properties of the microstructures. Properties of each powder has been used to form new properties of the admixed powders which has significant effects on the final microstructures of the composites. The homogeneous distribution of the reinforcements in the microstructures of the composites can be linked to the optimized parameters which in turn also enhance the mechanical properties of the composites.

Original languageEnglish
Title of host publicationProceedings of 2021 IEEE 12th International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages30-35
Number of pages6
ISBN (Electronic)9781665414531
ISBN (Print)9781665447683
DOIs
Publication statusPublished - 13 May 2021
Externally publishedYes
Event12th IEEE International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2021 - Cape Town, South Africa
Duration: 13 May 202115 May 2021

Publication series

NameProceedings of 2021 IEEE 12th International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2021

Conference

Conference12th IEEE International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2021
Country/TerritorySouth Africa
CityCape Town
Period13/05/2115/05/21

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