Physics

Porosity

Ultimate tensile strength

Creep

Fatigue limit

Composite material

Selective laser melting

Metallurgy

Materials science

Ductility (Earth science)

Quantum mechanics

Quasistatic process

Microstructure

Fatigue & Fracture of Engineering Materials & Structures

This work aims to compare the mechanical behavior of an AISI H13 steel obtained by additive manufacturing with that obtained by conventional manufacturing methods. The average values of the ultimate tensile strength (UTS) and ductility obtained for the specimens produced by the conventional method were equal to 658 MPa and 18%, respectively, which compares with 503 MPa and 0.75% registered for the selective laser melting (SLM) specimens. Inversely, the average hardness value determined for the SLM specimens was higher, 450 HV, than the observed for the conventional, 200 HV. In addition, the maximum applied stress corresponding to a fatigue limit's endurance of 2 × 10 6 cycles was equal to 340 and 85 MPa for conventional and SLM specimens, respectively. Therefore, from a fatigue design point of view, it was possible to infer that σ max /UTS = 0.17 for the SLM specimens tested. Porosity and lack of fusion influenced the static and the fatigue strength negatively in the SLM specimens.

Quasistatic and fatigue behavior of an AISI H13 steel obtained by additive manufacturing and conventional method