Velaphi Jeffrey Matjeke (Ph.D)

Velaphi jeffrey matjeke (ph.d)

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location of Velaphi Jeffrey Matjeke (Ph.D)City of Johannesburg, Gauteng, South Africa
Phone number of Velaphi Jeffrey Matjeke (Ph.D)+91 xxxx xxxxx
Followers of Velaphi Jeffrey Matjeke (Ph.D)3000 followers
  • Timeline

    Sept 2003 - Aug 2004

    Technician in training

    Refraline
    Feb 2005 - Feb 2006

    Metal casting technology station

    University of Johannesburg
    Mar 2006 - Mar 2014

    Chief Engineering Technician

    Transnet Freight Rail
    Current Company
    Apr 2014 - now

    Principal Engineer

    Transnet Engineering
  • About me

    Principal Engineer @ Transnet Engineering | Physical Metallurgy, Mechanical Engineering

  • Education

    • University of the witwatersrand

      2017 - 2021
      Doctor of philosophy (phd)-engineering metallurgical engineering
    • University of the witwatersrand

      2011 - 2012
      Gde welding engineering/metallurgy
    • University of johannesburg

      2003 - 2007
      Bachelor of technology (btech) metallurgy
    • University of the witwatersrand

      2011 - 2012
      Master of engineering (meng) welding engineering technology/technician
    • University of the witwatersrand

      2014 - 2017
      Master of science metallurgical engineering msc
    • Henley business school

      2020 - 2021
      Postgraduate diploma in management practice
  • Experience

    • Refraline

      Sept 2003 - Aug 2004
      Technician in training

      Refractory installation and maintenance

    • University of johannesburg

      Feb 2005 - Feb 2006
      Metal casting technology station

      Foundry Technology research

    • Transnet freight rail

      Mar 2006 - Mar 2014
      Chief engineering technician

      Derailment invesitigationQuality testing and quality assuranceFailure analysisTribology (friction and wear)Engineering designCorrosion protectionMaterial characterizationWelding Engineering

    • Transnet engineering

      Apr 2014 - now

      Senior engineer with over 15 years working experience in failure analysis of rolling stock (derailments and minor incidents), materials characterization, foundry technology, welding technology, product evaluation, refractories, research and development. Proficient in engineering evaluations of failures in metallic and non-metallic materials by deformation, fracture, corrosion and wear (Tribology). Responsibilities:-Material TechnologyDevelop and amend specifications for new and old componentsMetallurgical evaluation of materials i.e. SEM (EDS) analysis, evaluation of replicas and microstructure on the light microscopeSelection and recommendation of NDT Techniques: Dye penetrant testing, Ultrasonic testing, magnetic particle inspection and radiographyResponsibilities:- Failure investigation• Investigate failed components to establish the immediate causes and make recommendation.• Interface with the railway regulatorResponsibilities:- Welding Technology• Compile welding procedure• Conduct tests and approve new materials to be welded• Approve new welding process• Provide technical support i.e. electrode selection, whether or not to preheat or not etc. • Welding engineering: conducting welder & welding consumables qualification tests in accordance with ASME XI requirements, metallurgical evaluation of welds, calculating & recommending post weld heat treatment cycles (PWHT) on various materials, compiling recommended weld repair procedure and weld integrity assessments• Conduct research and development investigations to develop and test new fabrication processes and procedures, improve existing, develop new or modify current welding methods, techniques, and procedures, discover new patterns of welding phenomena, or to correlate and substantiate hypotheses• Provide technical support i.e. Show less

      • Principal Engineer

        Oct 2019 - now
      • Acting Principal Engineer

        Sept 2017 - Sept 2019
      • Senior Engineer

        Apr 2014 - Aug 2017
  • Licenses & Certifications

    • Professional engineering technologist

      Engineering council of south africa
      Jan 2011
      View certificate certificate
    • Saiw welding inspection

      Southern african institute of welding
      Nov 2010
      View certificate certificate
    • International welding technologist

      International institute of welding
      Mar 2015
      View certificate certificate
  • Volunteer Experience

    • Academic Advisory committee

      Issued by Tshwane University of Technology on May 2019
      Tshwane University of TechnologyAssociated with Velaphi Jeffrey Matjeke (Ph.D)