VARIATION OF IMPACT TOUGHNESS OF AS-BUILT DMLS TI6AL4V (ELI) SPECIMENS WITH TEMPERATURE

Amos Mwangi Muiruri, M Maringa, WB du Preez, LM Masu

Abstract


The response of direct metal laser sintering (DMLS) produced Ti6Al4V (ELI) to impact was investigated using an instrumented Charpy impact test machine and V-notch specimens. Impact toughness testing was conducted over the temperature range of -130oC to 250oC. The effect of the orientation of the V-notch, with reference to the base plate, was investigated. The results indicated that the samples that were produced with the V-notch facing the base plate (LO) had better values of impact toughness than those that were produced with the V-notch facing away from the base plate (UP) over most of the test temperatures. The study further established that as-built DMLS Ti6Al4V (ELI) retains appreciable notch toughness, even at extremely low temperatures


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DOI: https://doi.org/10.7166/29-3-2076

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Copyright (c) 2018 Amos Mwangi Muiruri, M Maringa, WB du Preez, LM Masu


ISSN 2224-7890 (on-line) ; ISSN 1012-277X (print)


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