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

被引：58
作者：
Garlea, E. [1 ]
Choo, H. [2 ]
Sluss, C. C. [1 ]
Koehler, M. R. [2 ]
Bridges, R. L. [1 ]
Xiao, X. [3 ,5 ]
Ren, Y. [3 ]
Jared, B. H. [4 ]
机构：
[1] CNS Y 12 Natl Secur Complex, POB 2009 MS 8097, Oak Ridge, TN 37831 USA
[2] Univ Tennessee, Knoxville, TN 37996 USA
[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
[4] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA
[5] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 763卷
关键词：
Resonant ultrasound spectroscopy (RUS); Elastic mechanical properties; X-ray synchrotron micro-tomography and diffraction; Porosity and texture; Stainless steel; Laser powder bed fusion; YOUNGS MODULUS; POISSONS RATIO; BEHAVIOR; PARTS; PARAMETERS;
D O I：
10.1016/j.msea.2019.138032
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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/mm(3) 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.
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页数：15
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