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

被引：66

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.

引用

页数：15

共 32 条

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