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Anisotropic fatigue properties of IN718 produced by powder bed fusion

Anisotropic fatigue properties of IN718 produced by powder bed fusion

Kategori
Konferansebidrag og faglig presentasjon
Sammendrag
Flat tensile specimens were produced from IN718 in SLM280 powder bed fusion machine. The specimens were arranged from flat to perpendicular positions on the build plate with 15° intervals. Support structures were used for all samples to facilitate slant printing and minimization of sample distortion. The samples were also post treated by hot isostatic pressing (HIP) to evaluate the effect of elevated temperature and pressure on surface finish quality. The as-print and HIPed surfaces were analyzed for surface roughness and distortion using white light interferometry (WLI). It was observed that the highest surface roughness evolves at 15° samples and HIPing exclusively affected the roughest surfaces, leaving the low roughness surfaces almost intact. Fatigue lifetime simulations suggest that complex components with surfaces at different angles can present inconsistent fatigue behavior.
Oppdragsgiver
  • Norges forskningsråd / 248243
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • Norges teknisk-naturvitenskapelige universitet
  • SINTEF Industri / Metallproduksjon og prosessering
  • SINTEF Industri / Bærekraftig energiteknologi
  • SINTEF Industri / Materialer og nanoteknologi
Presentert på
TMS 2018 147th annual meeting & exhibition
Sted
Phoenix, AZ
Dato
10.03.2018 - 14.03.2018
Arrangør
The Minerals, Metals & Materials Society
År
2018