Journal ArticleDOI
Nondestructive ultrasonic evaluation of additively manufactured AlSi10Mg samples
TLDR
In this paper, a Pulse-echo ultrasonic method was used to investigate possible anisotropy in selective laser melting additively manufactured (AM) AlSi10Mg samples.Abstract:
Pulse-echo ultrasonic method was carried out to investigate possible anisotropy in selective laser melting additively manufactured (AM) AlSi10Mg samples. Three types of ultrasonic analyses were employed: time of flight (TOF) sound velocity measurement, frequency depended attenuation and exponential fitted attenuation. Analysis of the transverse waves TOF sound velocity as a function the oscillation angle relative to the build direction reveals that the AM AlSi10Mg material has anisotropy in both transverse wave velocity and attenuation with respect to the build direction. Such an anisotropy is with symmetry around the build direction. Three transverse wave velocity zones were identified, low-velocity zone, where the transverse oscillation direction perpendicular to the build direction, high-velocity zone where the transverse oscillation direction parallel to the build direction and a transition zone. This behavior held even after heat treatments. The transverse velocity and the frequency depended attenuation seems to be sensitive tools that enable detection of subtle changes in AM products.read more
Citations
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Journal ArticleDOI
A review of ultrasonic testing applications in additive manufacturing: Defect evaluation, material characterization, and process control.
TL;DR: The present manuscript intends to review the ultrasonic testing techniques applied to additive manufacturing products; either in-situ or offline; and the codes and standards which are currently being developed for ultrasonic tested products are introduced.
Journal ArticleDOI
High-temperature mechanical properties of AlSi10Mg specimens fabricated by additive manufacturing using selective laser melting technologies (AM-SLM)
TL;DR: In this article, the authors investigated the tensile strength and creep properties of AlSi10Mg specimens fabricated by selective laser melting (SLM) in the Z-direction in the 25-400°C temperature range.
Journal ArticleDOI
Directed energy deposition of Al 5xxx alloy using Laser Engineered Net Shaping (LENS
David Svetlizky,Baolong Zheng,Tali Buta,Yizhang Zhou,Oz Golan,Uri Breiman,Rami Haj-Ali,Julie M. Schoenung,Enrique J. Lavernia,Noam Eliaz +9 more
TL;DR: In this paper, a directed energy deposition (DED) of wrought-like Al 5xxx AlMg alloy by Laser Engineered Net Shaping (LENS®) is presented, where a transition from an Al 5083 gas atomized powder feedstock to Al 5754 characteristics of the asdeposited material due to selective evaporation of Mg was observed.
Journal ArticleDOI
Effect of melting modes on microstructure and tribological properties of selective laser melted AlSi10Mg alloy
Hong Wu,Yaojia Ren,Junye Ren,An-hui Cai,Min Song,Yong Liu,Xiaolan Wu,Qingxiang Li,Weidong Huang,Xiaoteng Wang,Ian Baker +10 more
TL;DR: In this article, the effect of melting modes on microstructural evolution and tribological properties of AlSi10Mg alloy fabricated by selective laser melting (SLM) was investigated.
Journal ArticleDOI
The effect of texture on the anisotropy of thermophysical properties of additively manufactured AlSi10Mg
TL;DR: In this paper, the effects of the inherent anisotropy and existing porosity in AM AlSi10Mg were investigated in terms of thermophysical properties, namely thermal conductivity, diffusivity, heat capacity and thermal expansion.
References
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Journal ArticleDOI
Metal Additive Manufacturing: A Review
TL;DR: The state-of-the-art of additive manufacturing (AM) can be classified into three categories: direct digital manufacturing, free-form fabrication, or 3D printing as discussed by the authors.
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Young's Modulus, Shear Modulus, and Poisson's Ratio in Silicon and Germanium
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TL;DR: In this paper, the elastic coefficients for an arbitrary rectangular coordinate system are calculated as a function of direction cosines in the crystal and graphs of these moduli are also plotted for orientations in the (100) and (110) planes as well as planes determined by the [110] direction and any perpendicular direction.
Journal ArticleDOI
Design for additive manufacturing: trends, opportunities, considerations, and constraints
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TL;DR: In the case of aircraft components, AM technology enables low-volume manufacturing, easy integration of design changes and, at least as importantly, piece part reductions to greatly simplify product assembly.
Journal ArticleDOI
Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior
TL;DR: In this paper, the microstructure, high cycle fatigue (HCF), and fracture behavior of additive manufactured AlSi10Mg samples are investigated, and the results were analyzed statistically by design of experiments, correlation analysis, and marginal means plots.
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