Abstract

KNOWLES, C.R.; BECKER, T.H.  and  TAIT, R.B.. Residual stress measurements and structural integrity implications for selective laser melted TI-6al-4v^#. S. Afr. J. Ind. Eng. [online]. 2012, vol.23, n.3, pp.119-129. ISSN 2224-7890.

Selective laser melting (SLM) of Ti-6Al-4V has significant potential in the aerospace and biotechnology industries. SLM employs a focused laser beam to melt successive layers of metallic powder into complex components. This process can result in the generation of high thermally-induced residual stresses. These residual stresses, together with micro-flaws/ pores from the inherent fabrication process, may lead to premature fatigue crack initiation and propagation at relatively low cyclic stresses. The hole-drilling strain gauge method was used to evaluate residual stresses within SLM Ti-6Al-4V specimens, with the intention of understanding the associated mechanisms for the successful application of SLM Ti-6Al-4V in industry.

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