Variation of elastic mechanical properties with texture, porosity, and defect characteristics in laser powder bed fusion 316L stainless steel

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • E. Garlea
  • H. Choo
  • C. C. Sluss
  • M. R. Koehler
  • R. L. Bridges
  • X. Xiao
  • B. H. Jared

Detail(s)

Original languageEnglish
Article number138032
Journal / PublicationMaterials Science and Engineering A
Volume763
Online published17 Jun 2019
Publication statusPublished - 19 Aug 2019
Externally publishedYes

Abstract

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.

Research Area(s)

  • Elastic mechanical properties, Laser powder bed fusion, Porosity and texture, Resonant ultrasound spectroscopy (RUS), Stainless steel, X-ray synchrotron micro-tomography and diffraction

Citation Format(s)

Variation of elastic mechanical properties with texture, porosity, and defect characteristics in laser powder bed fusion 316L stainless steel. / Garlea, E.; Choo, H.; Sluss, C. C. et al.
In: Materials Science and Engineering A, Vol. 763, 138032, 19.08.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review