Electron Beam Melting of various structures and their quasi-static compression behavior

Decker, Sabine; Baumgart, Christine; Krüger, Lutz; Schumacher, Axel

doi:10.1016/j.msea.2020.139849

Cited by 1 publication

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different aspects of this PBF-EB processed CrMnNi steel have been investigated and published so far. Besides the influence of different processing strategies [ 10 , 19 ] on microstructure evolution, studies have focused on the quasi-static properties [ 10 , 19 ]; the cyclic deformation behavior, which has been investigated in total strain controlled fatigue tests [ 20 ]; feasibility analyses considering different kinds of square-celled structures and their mechanical behavior during compression testing [ 21 , 22 ]; and the influence of a process-induced variation in manganese fraction on the tensile properties [ 19 ]. The latter was achieved by adjusting the beam parameters and energy input, respectively, and, thereby, varying the extent of evaporation of manganese during PBF-EB processing.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Crack Growth in Chemically Tailored Isotropic Austenitic Steel Processed by Electron Beam Powder Bed Fusion

et al. 2021

View full text Add to dashboard Cite

The present study analyzes the cyclic crack propagation behavior in an austenitic steel processed by electron beam powder bed fusion (PBF-EB). The threshold value of crack growth as well as the crack growth behavior in the Paris regime were studied. In contrast to other austenitic steels, the building direction during PBF-EB did not affect the crack propagation rate, i.e., the crack growth rates perpendicular and parallel to the building direction were similar due to the isotropic microstructure characterized by equiaxed grains. Furthermore, the influence of significantly different building parameters was studied and, thereby, different energy inputs causing locally varying manganese content. Crack growth behavior was not affected by these changes. Even a compositional gradation within the same specimen, i.e., crack growth through an interface of areas with high and areas with low manganese content, did not lead to a significant change of the crack growth rate. Thus, the steel studied is characterized by a quite robust cyclic crack growth behavior independent from building direction and hardly affected by typical parameter deviations in the PBF-EB process.

show abstract