Anisotropy of mechanical properties of products manufactured using selective laser melting of powdered materials

Popovich, Anatoliy; Sufiiarov, Vadim; Борисов, Е. В.; Polozov, Igor; Masaylo, Dmitriy; Grigoriev, Аlexey

doi:10.3103/s1067821217040149

Cited by 55 publications

(16 citation statements)

References 24 publications

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“…Microstructural and mechanical anisotropy of additively manufactured metals, particularly titanium, is well understood [76][77][78][79][80]. The results of this study showed that there is also a significant amount of dimensional anisotropy.…”

Section: Additive Manufacturingmentioning

confidence: 64%

Cumulative Inaccuracies in Implementation of Additive Manufacturing Through Medical Imaging, 3D Thresholding, and 3D Modeling: A Case Study for an End-Use Implant

et al. 2020

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In craniomaxillofacial surgical procedures, an emerging practice adopts the preoperative virtual planning that uses medical imaging (computed tomography), 3D thresholding (segmentation), 3D modeling (digital design), and additive manufacturing (3D printing) for the procurement of an end-use implant. The objective of this case study was to evaluate the cumulative spatial inaccuracies arising from each step of the process chain when various computed tomography protocols and thresholding values were independently changed. A custom-made quality assurance instrument (Phantom) was used to evaluate the medical imaging error. A sus domesticus (domestic pig) head was analyzed to determine the 3D thresholding error. The 3D modeling error was estimated from the computer-aided design software. Finally, the end-use implant was used to evaluate the additive manufacturing error. The results were verified using accurate measurement instruments and techniques. A worst-case cumulative error of 1.7 mm (3.0%) was estimated for one boundary condition and 2.3 mm (4.1%) for two boundary conditions considering the maximum length (56.9 mm) of the end-use implant. Uncertainty from the clinical imaging to the end-use implant was 0.8 mm (1.4%). This study helps practitioners establish and corroborate surgical practices that are within the bounds of an appropriate accuracy for clinical treatment and restoration.

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Section: Additive Manufacturingmentioning

confidence: 64%

Cumulative Inaccuracies in Implementation of Additive Manufacturing Through Medical Imaging, 3D Thresholding, and 3D Modeling: A Case Study for an End-Use Implant

et al. 2020

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“…In the SLM-produced parts, in addition to the speci c structure, defects may be present -mainly voids and lack of fusion [54]. Although no voids and microcracks were detected on the sample surface by optical microscopy, in [8,26] it is reported that porosity is actually very common in SLM-produced parts.…”

Section: Initial Microstructure Of Slm-produced and Wrought Ti-6al-4vmentioning

confidence: 99%

Flow Behavior and Microstructure Evolution of Ti-6Al-4V Titanium Alloy Produced by Selective Laser Melting Compared to Wrought

Salikhyanov

Veselova

Волков

2021

Preprint

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Nowadays, selective laser melting (SLM) represents an option for manufacturing parts from titanium alloys, especially from Ti-6Al-4V alloy. However, mechanical properties of parts made of Ti-6Al-4V such as ductility and fatigue resistance are significantly lower than that for conventional manufactured parts. One of the promising ways to improve mechanical properties of SLM parts can be the use of deformation post-processing, for example, combining SLM with subsequent die forging. Therefore, the aim of the present study is to investigate the rheological properties and microstructure evolution of Ti-6Al-4V titanium alloy fabricated by SLM under temperatures of cold and hot deformation. The tests of cylindrical samples made of Ti-6Al-4V alloy was performed using a plastometer in the temperature range of 20–1200 °C, at strain rate ξ of 1 s− 1 up to strain e of 0.85. To evaluate the effect of manufacturing method of samples on flow behaviour and microstructure evolution of the material, the samples made of Ti-6Al-4V alloy fabricated by conventional technology were tested under the same conditions. The differences in the flow behaviour of SLM and conventional manufactured samples from Ti-6Al-4V which were significant at test temperatures of 20–900 °С were analysed and explained. In contrast to conventional manufactured parts, SLM-produced Ti-6Al-4V reveal higher peak stresses in the flow curves and temperature sensitivity of flow stresses. This in turn leads to high inhomogeneity of deformation of SLM-produced parts.

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“…From the manufacturing perspective, AM processes tend to be at least as restrictive, if not more, in terms of manufacturability constraints than traditional processes. [29,[48][49][50] The layer-based nature of all AM processes produce anisotropic material properties in the final parts [17,[51][52][53] , the surface finish of final parts can be poor [17,[54][55][56] , and the inherent residual stresses from some processes can dramatically reduce the fatigue life of the parts [57][58][59] . Due to these and other considerations, AM-made parts can be prone to fracture and may have poor dimensional accuracy for some processes and materials.…”

Section: Introductionmentioning

confidence: 99%

Design and Applications of Additive Manufacturing and 3D Printing

2022

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Anisotropy of mechanical properties of products manufactured using selective laser melting of powdered materials

Cited by 55 publications

References 24 publications

Cumulative Inaccuracies in Implementation of Additive Manufacturing Through Medical Imaging, 3D Thresholding, and 3D Modeling: A Case Study for an End-Use Implant

Cumulative Inaccuracies in Implementation of Additive Manufacturing Through Medical Imaging, 3D Thresholding, and 3D Modeling: A Case Study for an End-Use Implant

Flow Behavior and Microstructure Evolution of Ti-6Al-4V Titanium Alloy Produced by Selective Laser Melting Compared to Wrought

Design and Applications of Additive Manufacturing and 3D Printing

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