Abstract

VAN ZYL, I.; YADROITSAVA, I.  and  YADROITSEV, I.. Residual stress in Ti6Al4V objects produced by direct metal laser sintering. S. Afr. J. Ind. Eng. [online]. 2016, vol.27, n.4, pp.134-141. ISSN 2224-7890.  http://dx.doi.org/10.7166/27-4-1468.

Direct Metal Laser Sintering produces 3D objects using a layer-by-layer method in which powder is deposited in thin layers. Laser beam scans over the powder fusing powder particles as well as the previous layer. High-concentration of laser energy input leads to high thermal gradients which induce residual stress within the as-built parts. Ti6Al4V (ELI) samples have been manufactured by EOSINT M280 system at prescribed by EOS process-parameters. Residual stresses were measured by XRD method. Microstructure, values and directions of principal stresses inTi6Al4V DMLS samples were analysed.

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