Microstructural evolution and resulting properties of differently sintered and heat-treated binder-jet 3D-printed Stellite 6

Mostafaei, Amir; Vecchis, Pierangeli Rodriguez De; Buckenmeyer, Michael J.; Wasule, Sumant R.; Brown, Bryan N.; Chmielus, Markus

doi:10.1016/j.msec.2019.04.011

Cited by 43 publications

(6 citation statements)

References 47 publications

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“…Step by step, the raw material of unbound powder is finally removed, and a 3D model is constructed [ 47 ]. This technology is usually used in combination with other technologies, such as high temperature burning [ 49 ], stereolithography [ 50 ], or electro-hydro dynamic jetting [ 51 ], etc. The following is a commercial application of a more widely used, but also a combination of a variety of technologies of printing technology.…”

Section: Several Different 3d Printing Technologiesmentioning

confidence: 99%

Applications of 3D printed bone tissue engineering scaffolds in the stem cell field

Wang

Guo

2021

Regenerative Therapy

132

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Due to traffic accidents, injuries, burns, congenital malformations and other reasons, a large number of patients with tissue or organ defects need urgent treatment every year. The shortage of donors, graft rejection and other problems cause a deficient supply for organ and tissue replacement, repair and regeneration of patients, so regenerative medicine came into being. Stem cell therapy plays an important role in the field of regenerative medicine, but it is difficult to fill large tissue defects by injection alone. The scientists combine three-dimensional (3D) printed bone tissue engineering scaffolds with stem cells to achieve the desired effect. These scaffolds can mimic the extracellular matrix (ECM), bone and cartilage, and eventually form functional tissues or organs by providing structural support and promoting attachment, proliferation and differentiation. This paper mainly discussed the applications of 3D printed bone tissue engineering scaffolds in stem cell regenerative medicine. The application examples of different 3D printing technologies and different raw materials are introduced and compared. Then we discuss the superiority of 3D printing technology over traditional methods, put forward some problems and limitations, and look forward to the future.

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Section: Several Different 3d Printing Technologiesmentioning

confidence: 99%

Applications of 3D printed bone tissue engineering scaffolds in the stem cell field

Wang

Guo

2021

Regenerative Therapy

132

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“…Instead of selectively melting the particles of the powder bed, in MBJ a liquid binder deposited by a print head is bonding the powder particles to create green parts, which are then consolidated by a subsequent sintering step [3]. This enables a high build-rate as well as the processing of a wide range of materials [4,5] such as hard weldable materials like high-carbon tool steels [6], ceramics [7–9] and hard metals [10] or functional materials [11–14] in addition to the most common user metals, like stainless steels [15–19], titanium alloys [20,21], nickel-based alloys [22–24] and cobalt-based alloys [25,26]. Materials that tend to show high residual stresses and cracks in LBM [6,25–27] can be processed without distortion due to the homogeneous temperature distribution during sintering.…”

Section: Introductionmentioning

confidence: 99%

“…This enables a high build-rate as well as the processing of a wide range of materials [4,5] such as hard weldable materials like high-carbon tool steels [6], ceramics [7–9] and hard metals [10] or functional materials [11–14] in addition to the most common user metals, like stainless steels [15–19], titanium alloys [20,21], nickel-based alloys [22–24] and cobalt-based alloys [25,26]. Materials that tend to show high residual stresses and cracks in LBM [6,25–27] can be processed without distortion due to the homogeneous temperature distribution during sintering. The lack of temperature gradients during printing eliminates the need for support structures, thus reducing time-consuming post-processing.…”

Section: Introductionmentioning

confidence: 99%

Powder condition and spreading parameter impact on green and sintered density in metal binder jetting

2021

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Metal binder jetting is a high throughput additive manufacturing process of growing interest. The progress is driven by improvements in machine technology, enabling the processing of finer powders to produce homogeneous, dense final parts. However, the strong cohesive forces of fine metal powders impair flowability, packing behaviour and thus the properties relevant for powder spreading. This paper investigates the impact of powder condition and spreading parameters on green and sintered density using an Analysis of Variance. Parts from dried and from untreated powder are printed, varying in layer thickness, roller diameter, supply-to-spread ratio, translational and rotational roller speed. Powder drying increases the statistical impact of the spreading parameter and improves the green density, while the sintered density remains unchanged. Layer thickness and roller diameter have the most significant effect. Furthermore, the spreading parameter combinations that resulted in a high green density also provided a high sintered density.

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“…Recently, Traxel and Bandyopadhyay [ 22 ] have successfully obtained WC-Co + diamond composites using the LENS technique. Moreover, the prototype sample parts from Co-6 alloy have also been successfully obtained from gas-atomized powder using binder-jet 3D printing [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Cobalt-Based Stellite 6 Alloy Coating Fabricated by Laser-Engineered Net Shaping (LENS)

Durejko

Łazińska

2021

Materials

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The results of microstructure and mechanical properties evaluation of a Stellite 6 (Co-6) alloy deposited on X22CrMoV12-1 substrate by the laser-engineered net shaping (LENSTM) technology are presented in this paper. The Stellite 6 alloy is widely used in industry due to its excellent wear resistance at elevated temperatures and corrosive environments. Specific properties of this alloy are useful in many applications, e.g., as protective coatings in steam turbine components. In this area, the main problems are related to the fabrication of coatings on complex-shaped parts, the low metallurgical quality of obtained coatings, and its insufficient adhesion to a substrate. The results of recently performed investigations proved that the LENS technology is one of the most effective manufacturing techniques of the Co-6 alloy coatings (especially deposited on complex-shaped turbine parts). The microstructural and phase analyses of obtained Stellite 6 coatings were carried out by light microscopy techniques and X-ray diffraction analysis. A chemical homogeneity of Co-6 based layers and a fluctuation of chemical composition in coating–substrate zone after the laser deposition were analyzed using an energy dispersive X-ray spectrometer coupled with scanning electron microscopy. The room temperature strength and ductility of the LENS processed layers were determined in static bending tests.

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Microstructural evolution and resulting properties of differently sintered and heat-treated binder-jet 3D-printed Stellite 6

Cited by 43 publications

References 47 publications

Applications of 3D printed bone tissue engineering scaffolds in the stem cell field

Applications of 3D printed bone tissue engineering scaffolds in the stem cell field

Powder condition and spreading parameter impact on green and sintered density in metal binder jetting

Characterization of Cobalt-Based Stellite 6 Alloy Coating Fabricated by Laser-Engineered Net Shaping (LENS)

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