Non-destructive testing to characterize interlayer bonds of idealized concrete additive manufacturing products

Helsel, Michelle A.; Popovics, John S.; Stynoski, Peter B.; Kreiger, Eric L.

doi:10.1016/j.ndteint.2021.102443

Cited by 15 publications

(3 citation statements)

References 21 publications

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“…Only a few studies on the use of acoustic NDT methods for 3D-printing have been reported so far. Helsel et al [57] demonstrated the possibility of using ultrasonic tomography for the evaluation of layer bond in 3D-printed structures. Ma et al [58] showed, that UPV can be used to estimate the compressive strength of printed specimens.…”

Section: Non-destructive Testing For Defect Detection In 3d-printed S...mentioning

confidence: 99%

A roadmap for quality control of hardening and hardened printed concrete

Mechtcherine

Tittelboom

Kazemian

et al. 2022

Cement and Concrete Research

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Section: Non-destructive Testing For Defect Detection In 3d-printed S...mentioning

confidence: 99%

A roadmap for quality control of hardening and hardened printed concrete

Mechtcherine

Tittelboom

Kazemian

et al. 2022

Cement and Concrete Research

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“…In recent years, SLM has been widely applied in various fields, such as aerospace components and medical devices [6]. Nondestructive methods such as radiography and ultrasonics have been developed to detect defects such as weak bonds [7]. The mechanical properties of these parts are of primary importance for quality assurance.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive measurement of anisotropic elastic constants of selective laser melted 316L based on a tri-mode ultrasonic method

Yuan¹,

Akase²,

Ma³

et al. 2023

Meas. Sci. Technol.

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Selective laser melting (SLM) technology can rapidly form metal parts with complex geometry, but the internal microstructure and material properties are significantly different from those of traditionally manufactured parts, such as obvious anisotropy and inhomogeneity. This paper proposed a tri-mode ultrasonic system to nondestructively measure the anisotropic elastic constants of 316L stainless steel prepared by SLM. Firstly, the quantitative relationship between ultrasonic wave velocities and anisotropic elastic constants was derived for elliptical anisotropic materials. The anisotropic elastic constants and Thomsen anisotropic parameters can be determined by measuring four ultrasonic wave velocities V_11, V_33, V_12, and V_13. Therefore, a tri-mode ultrasonic transducer was designed and fabricated to build the elastic constant ultrasonic measurement system. Then, the elastic constants and Thomsen anisotropic parameters of SLM samples were measured, and the key process parameters’ influence was discussed. The standard static tensile test validated the result of the ultrasonic test, and the maximum relative error was 6.94%. This study will provide a novel nondestructive measurement method and system of anisotropic elastic constants to ensure internal quality and improve the additive manufacturing process.

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“…Very few studies have focused on developing non-destructive evaluation techniques for monitoring the in situ properties of the 3D printed material. Previously, bond tests [24] and ultrasonic transducers [25] were used for understanding the bond development in 3D printed material. A combination of PZT sensors was recently used to monitor changes in 3D-printed concrete made with a cementitious binder [26].…”

Section: Introductionmentioning

confidence: 99%

In situ embedded PZT sensor for monitoring 3D concrete printing: application in alkali-activated fly ash-slag geopolymers

Kocherla¹,

Kamakshi²,

Subramaniam³

2021

Smart Mater. Struct.

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An embedded PZT sensor is developed for in situ monitoring of 3D-printed materials formed by extrusion-based layer deposition. The PZT sensor with a two-layer protection coating is embedded in the material during the layer deposition, and continuous measurements are obtained through the post-printing period. The PZT sensor is used to detect the physio-chemical changes in the alkali-activated fly ash-slag geopolymer with time. The effect of the added weight of each layer of print is sensitively reflected in the electrical impedance (EI) measurement obtained from the PZT sensor. The changes in EI measurements obtained from the embedded PZT sensor are compared with the measurements on the material related to the changes in the rheological behavior, reaction kinetics assessed using calorimetry, and setting behavior in the material. The build-up of the internal structure within the material, which allows buildability, is assessed from the conductance signature of the embedded PZT sensor. The changes produced by the chemical reactions within the binder, which bring about irreversible changes leading to the setting of the printed structure, are also sensitively detected in the EI measurements from the embedded PZT sensor. The amplitude of conductance is sensitive to the setting of the material. The frequency changes from the recorded EI signature reflect the continuous increase in the material stiffness with time.

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Non-destructive testing to characterize interlayer bonds of idealized concrete additive manufacturing products

Cited by 15 publications

References 21 publications

A roadmap for quality control of hardening and hardened printed concrete

A roadmap for quality control of hardening and hardened printed concrete

Nondestructive measurement of anisotropic elastic constants of selective laser melted 316L based on a tri-mode ultrasonic method

In situ embedded PZT sensor for monitoring 3D concrete printing: application in alkali-activated fly ash-slag geopolymers

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