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Bending fatigue behaviour of 17-4 PH gears produced with additive techonlogies
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  • Franco Concli,
  • Luca Bonaiti,
  • Luca Cortese,
  • Filippo Nalli,
  • Francesco Rosa,
  • Carlo Gorla
Franco Concli
Free University of Bolzano
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Luca Bonaiti
Politecnico di Milano
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Luca Cortese
University of Rome La Sapienza
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Filippo Nalli
Free University of Bolzano
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Francesco Rosa
Politecnico di Milano
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Carlo Gorla
Politecnico di Milano
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Abstract

The introduction on the industrial market of additive technologies is changing the way in which parts are designed and manufactured. Within this context, designers are looking for the possibilities of producing parts via the addition of material, rather than its removal. Design of critical parts (e.g. gears and shafts) requires specic resistance data that, due to the intrinsic modernity of additive technologies, are not present in the literature. This paper presents the results of an experimental campaign aimed to determine the bending fatigue limit for gears made by 17-4 PH produced via selective laser melting. The fatigue limit, obtained by using two dierent statistical approaches, is presented here according to the ISO standard in order to compare it with those of different materials. Additional analysis have been done in order to investigate the failure origin.