TENSILE PROPERTIES AND MICROSTRUCTURE OF DIRECT METAL LASER-SINTERED TI6AL4V (ELI) ALLOY

Authors

  • M G Moletsane Department of Mechanical and Mechatronic Engineering, Central University of Technology
  • Pavel Krakhmalev Karlstad University, Department of Engineering and Physics
  • N Kazantseva Institute of Metal Physics, Urals Branch of the Academy of Sciences
  • Anton du Plessis CT Scanner Facility, University of Stellenbosch
  • I Yadroitsava Department of Mechanical and Mechatronic Engineering, Central University of Technology
  • I Yadroitsev Department of Mechanical and Mechatronic Engineering, Central University of Technology

DOI:

https://doi.org/10.7166/27-3-1667

Keywords:

direct metal laser sintering, tensile properties, microstructure, Ti6Al4V

Abstract

Direct metal laser sintering (DMLS) is an additive manufacturing technology used to melt metal powder by high laser power to produce customised parts, light-weight structures, or other complex objects. During DMLS, powder is melted and solidified track-by-track and layer-by-layer; thus, building direction can influence the mechanical properties of DMLS parts. The mechanical properties and microstructure of material produced by DMLS can depend on the powder properties, process parameters, scanning strategy, and building geometry. In this study, the microstructure, tensile properties, and porosity of DMLS Ti6Al4V (ELI) horizontal samples were analysed. Defect analysis by CT scans in pre-strained samples was used to detect the crack formation mechanism during tensile testing of as-built and heat-treated samples. The mechanical properties of the samples before and after stress relieving are discussed. 

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Published

2016-11-11

How to Cite

Moletsane, M. G., Krakhmalev, P., Kazantseva, N., du Plessis, A., Yadroitsava, I., & Yadroitsev, I. (2016). TENSILE PROPERTIES AND MICROSTRUCTURE OF DIRECT METAL LASER-SINTERED TI6AL4V (ELI) ALLOY. The South African Journal of Industrial Engineering, 27(3), 110–121. https://doi.org/10.7166/27-3-1667

Issue

Vol. 27 No. 3 (2016)

Section

General Articles

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