TY - JOUR
T1 - Variation of elastic mechanical properties with texture, porosity, and defect characteristics in laser powder bed fusion 316L stainless steel
AU - Garlea, E.
AU - Choo, H.
AU - Sluss, C. C.
AU - Koehler, M. R.
AU - Bridges, R. L.
AU - Xiao, X.
AU - Ren, Y.
AU - Jared, B. H.
PY - 2019/8/19
Y1 - 2019/8/19
N2 - Elastic mechanical properties of 316 L stainless steel samples fabricated using laser powder bed fusion were studied non-destructively through resonant ultrasound spectroscopy. Samples in five different conditions were obtained by varying the laser power from 103 W (the highest density condition) to 68 W (the lowest density condition) at constant laser speed, producing samples with a volume energy density in the 24.5–16.5 J/mm3 range and volumetric porosity in the 0.1–10% range. The observed elastic mechanical properties are discussed taking into consideration the bulk texture developed and quantitative pore characteristics studied using high-energy high-resolution synchrotron X-ray diffraction and X-ray computed micro-tomography, respectively. Furthermore, empirical exponential relationships are provided to express the functional dependence of Young's and shear moduli with porosity.
AB - Elastic mechanical properties of 316 L stainless steel samples fabricated using laser powder bed fusion were studied non-destructively through resonant ultrasound spectroscopy. Samples in five different conditions were obtained by varying the laser power from 103 W (the highest density condition) to 68 W (the lowest density condition) at constant laser speed, producing samples with a volume energy density in the 24.5–16.5 J/mm3 range and volumetric porosity in the 0.1–10% range. The observed elastic mechanical properties are discussed taking into consideration the bulk texture developed and quantitative pore characteristics studied using high-energy high-resolution synchrotron X-ray diffraction and X-ray computed micro-tomography, respectively. Furthermore, empirical exponential relationships are provided to express the functional dependence of Young's and shear moduli with porosity.
KW - Elastic mechanical properties
KW - Laser powder bed fusion
KW - Porosity and texture
KW - Resonant ultrasound spectroscopy (RUS)
KW - Stainless steel
KW - X-ray synchrotron micro-tomography and diffraction
UR - http://www.scopus.com/inward/record.url?scp=85068895238&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85068895238&origin=recordpage
U2 - 10.1016/j.msea.2019.138032
DO - 10.1016/j.msea.2019.138032
M3 - RGC 21 - Publication in refereed journal
SN - 0921-5093
VL - 763
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
M1 - 138032
ER -
