Ultrasonic nondestructive evaluation of laser powder bed fusion 316L stainless steel

Kim, Changgong; Yin, Houshang; Shmatok, Andrii; Prorok, Barton C.; Lou, Xiaoyuan; Matlack, Kathryn H.

doi:10.1016/j.addma.2020.101800

Cited by 35 publications

(15 citation statements)

References 39 publications

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“…Therefore, it is very suitable for on-site testing of elastic constants. Kim et al measured ultrasonic velocity to evaluate defects and microstructural differences of AM stainless steel 316L [14]. Hu et al measured both longitudinal and transverse wave velocities, respectively, to calculate the elastic constants of the metal alloy and investigated the influence of ambient temperature [15].…”

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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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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“…An important research area is the non-destructive inspection of adhesive joints, particularly ultrasonic evaluation. The ultrasonic testing of adhesive joints has covered many areas, including the properties of the joints themselves and the materials being joined [6][7][8]. The effects of surface roughness for bonding and hardness on ultrasonic measurements have also been studied [9,10].…”

Section: Introductionmentioning

confidence: 99%

Study of the Kinetics of Adhesive Bond Formation Using the Ultrasonic Method

Kowalczyk,

Jósko,

Wieczorek

et al. 2023

Applied Sciences

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Adhesive bonding is widely used in modern industry. It has many advantages—the main one being the reduction in production costs. It also has certain limitations. One of the limitations of adhesive bonds is the relatively long bonding time of the joints. The main objective of this research was to determine the possibility of studying the kinetics of adhesive bond formation using a non-destructive ultrasonic method. A research experiment was planned and carried out. Adhesive specimens were prepared, and their quality changes over time were evaluated. In addition, the change in ultrasonic measures during the testing of these bonds was evaluated, as well as the hardness of the adhesive. In this study, the choice of test apparatus was made, in particular ultrasonic probes for the adhesive used and the materials to be bonded. The choice of adhesive was also made, for one in which bonding phenomena occur uniformly throughout the volume. This work examined the changes in the mechanical strength and hardness with time. The tests showed that the greatest changes in mechanical strength occur within the first 24 h after the bond was made. With the mechanical strength reaching 12.6 Mpa after 216 h, the strength in the first 24 h was 10.36 (for bonded steel sheets). For bonded steel discs, the maximum tensile strength was 26.99 Mpa (after 216 h), with a hardness of 22.93 Mpa during the first 24 h. Also, significant changes were observed in the adhesive hardness during the first 24 h. The hardness of the adhesive after 216 h was 70.4 Shore’a on the D scale, while after 24 h it was 69.4 Shore’a on the D scale. Changes in the ultrasonic parameters of the adhesive bond quality were found to occur along with changes in the bond quality.

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“…For several decades, these studies have focused on metals generated using traditional manufacturing techniques. More recently, ultrasound has been applied to study different properties of additively manufactured materials [25][26][27][28][29][30]. Kim et al measured ultrasonic phase velocity and conducted XCT in laser PBF 316L stainless steel to establish correlations to pore size, density, and aspect ratio as well as grain texture [28].…”

Section: Introductionmentioning

confidence: 99%

“…More recently, ultrasound has been applied to study different properties of additively manufactured materials [25][26][27][28][29][30]. Kim et al measured ultrasonic phase velocity and conducted XCT in laser PBF 316L stainless steel to establish correlations to pore size, density, and aspect ratio as well as grain texture [28]. Park et al applied machine learning algorithms to evaluate porosity of titanium parts fabricated via laser PBF with ultrasound and noted a positive correlation between the attenuation coefficient and porosity and an inverse correlation between wave speed and porosity [27].…”

Section: Introductionmentioning

confidence: 99%

Uncovering microstructural heterogeneities in binder jet printed SS316L through ultrasonic testing and X-ray computed tomography

Cook

Huang

Smithson

et al. 2023

Materials Characterization

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Ultrasonic nondestructive evaluation of laser powder bed fusion 316L stainless steel

Cited by 35 publications

References 39 publications

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

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

Study of the Kinetics of Adhesive Bond Formation Using the Ultrasonic Method

Uncovering microstructural heterogeneities in binder jet printed SS316L through ultrasonic testing and X-ray computed tomography

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