Publication detail

Fatigue Behaviour of Powder Steel Specimens Made by Selective Laser Melting

POKLUDA, J. HORNÍKOVÁ, J. PÍŠKA, M. ŠANDERA, P.

Original Title

Fatigue Behaviour of Powder Steel Specimens Made by Selective Laser Melting

English Title

Fatigue Behaviour of Powder Steel Specimens Made by Selective Laser Melting

Type

conference paper

Language

en

Original Abstract

The Selective Laser Melting (SLM) is an advanced technology of producing three-dimensional solid objects by 3D printing from a digital file. The article deals with fatigue push-pull testing of SLM samples to determine the dependence of their fatigue characteristics on the orientation of laser melted layers to the loading axis, the hatch spacing of the laser beam and the surface roughness of 3D printed objects. The results revealed that the transverse orientation of layers (90° to the loading axis) led to a defect type of fracture and to a lower fatigue life than that exhibited by both the horizontal (0°) and inclined (45°) orientations. The standard hatch spacing led to a higher fatigue life than the reduced one. The samples with machined and polished surfaces revealed, due to their very small averaged surface roughness, a much better fatigue resistance than that exhibited by the as-built specimens.

English abstract

The Selective Laser Melting (SLM) is an advanced technology of producing three-dimensional solid objects by 3D printing from a digital file. The article deals with fatigue push-pull testing of SLM samples to determine the dependence of their fatigue characteristics on the orientation of laser melted layers to the loading axis, the hatch spacing of the laser beam and the surface roughness of 3D printed objects. The results revealed that the transverse orientation of layers (90° to the loading axis) led to a defect type of fracture and to a lower fatigue life than that exhibited by both the horizontal (0°) and inclined (45°) orientations. The standard hatch spacing led to a higher fatigue life than the reduced one. The samples with machined and polished surfaces revealed, due to their very small averaged surface roughness, a much better fatigue resistance than that exhibited by the as-built specimens.

Keywords

Selective Laser Melting; Fatigue properties; Layer orientation, Surface roughness

Released

09.01.2018

Publisher

Tanger

Location

Ostrava

ISBN

978-80-87294-79-6

Book

26th International Conference on Metallurgy and Materials

Edition

1

Edition number

1

Pages from

979

Pages to

984

Pages count

6