Production of NiTi alloy by direct metal deposition of mechanically alloyed powder mixtures

Khademzadeh, Saeed; Parvin, Nader; Bariani, Paolo Francesco

doi:10.1007/s12541-015-0300-1

Cited by 38 publications

(7 citation statements)

References 12 publications

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“…This makes SiH 4 -doped inert gases also attractive for processes, where oxygen-free process atmospheres at ambient temperatures are requested and a total encapsulation of the process from the environment is costly or generally not possible. For instance, this may be applied to additive manufacturing processes, where locally an oxygen free environment is needed for processing oxidation sensitive metallic powders by means of laser melting [21,22]. Finally, any emission of process gas into the environment is not critical, as the SiH 4 reacts to form harmless amorphous SiO 2 .…”

Section: Discussionmentioning

confidence: 99%

Brazing in SiH4-Doped Inert Gases: A New Approach to an Environment Friendly Production Process

Holländer

Wulff

Langohr

et al. 2019

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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Engineering under protective atmospheres or in vacuum allows the production of materials and components, where the absence of oxygen is an essential requirement for a successful processing. Ideally, joining or coating of (and with) metallic materials needs oxide free material surfaces, in order to achieve durable joints or coatings. Using the established technology of brazing in controlled atmosphere, fundamental physical mechanisms for deoxidation of metal surfaces are presented and the role of oxygen and water residue in the process atmosphere is analyzed. Furthermore, the doping of gases with monosilane for generating virtually oxygen-free process atmospheres is introduced and its advantages for an oxygen-free production are discussed.

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Section: Discussionmentioning

confidence: 99%

Brazing in SiH4-Doped Inert Gases: A New Approach to an Environment Friendly Production Process

Holländer

Wulff

Langohr

et al. 2019

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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“…Figure 5 b shows an example of LENS 3D-printed cellular honeycomb structures with a wall thickness of 0.7 mm [ 140 ]. The micro-PDED/DLMD process (μ-PDED/DLMD) has achieved minimum feature size of 0.5 mm [ 141 , 142 , 143 , 144 ]. Figure 5 c shows a NiTi single track printed by μ-PDED/DLMD with a width 20 μm.…”

Section: Powder-based 3d-printing Modalities and Their Resolutionmentioning

confidence: 99%

Powder-Based 3D Printing for the Fabrication of Device with Micro and Mesoscale Features

et al. 2020

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Customized manufacturing of a miniaturized device with micro and mesoscale features is a key requirement of mechanical, electrical, electronic and medical devices. Powder-based 3D-printing processes offer a strong candidate for micromanufacturing due to the wide range of materials, fast production and high accuracy. This study presents a comprehensive review of the powder-based three-dimensional (3D)-printing processes and how these processes impact the creation of devices with micro and mesoscale features. This review also focuses on applications of devices with micro and mesoscale size features that are created by powder-based 3D-printing technology.

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“…Flowability of powders is a prerequisite for the DED process. Ball milled powders have been shown to have good flowability and can produce mechanically alloyed powders with homogenous composition, possibly for precision applications of DED (Khademzadeh et al , 2015; Additive Manufacturing of Metals , 2020). The technique can also be used for producing composite powders for functionally graded laser clads (Pei et al , 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The current issue and full text archive of this journal is available on Emerald Insight at: https://www.emerald.com/insight/1355-2546.htm ore pellets ranged between 30 and 100 US$/tonne between the years 2015-20 (LKAB Sweden, 2020.…”

Section: Introductionmentioning

confidence: 99%

From mine to part: directed energy deposition of iron ore

Naesstroem

Brueckner

Kaplan

2021

RPJ

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Purpose This paper aims to gain an understanding of the behaviour of iron ore when melted by a laser beam in a continuous manner. This fundamental knowledge is essential to further develop additive manufacturing routes such as production of low cost parts and in-situ reduction of the ore during processing. Design/methodology/approach Blown powder directed energy deposition was used as the processing method. The process was observed through high-speed imaging, and computed tomography was used to analyse the specimens. Findings The experimental trials give preliminary results showing potential for the processability of iron ore for additive manufacturing. A large and stable melt pool is formed in spite of the inhomogeneous material used. Single and multilayer tracks could be deposited. Although smooth and even on the surface, the single layer tracks displayed porosity. In case of multilayered tracks, delamination from the substrate material and deformation can be seen. High-speed videos of the process reveal various process phenomena such as melting of ore powder during feeding, cloud formation, melt pool size, melt flow and spatter formation. Originality/value Very little literature is available that studies the possible use of ore in additive manufacturing. Although the process studied here is not industrially useable as is, it is a step towards processing cheap unprocessed material with a laser beam.

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Production of NiTi alloy by direct metal deposition of mechanically alloyed powder mixtures

Cited by 38 publications

References 12 publications

Brazing in SiH4-Doped Inert Gases: A New Approach to an Environment Friendly Production Process

Brazing in SiH4-Doped Inert Gases: A New Approach to an Environment Friendly Production Process

Powder-Based 3D Printing for the Fabrication of Device with Micro and Mesoscale Features

From mine to part: directed energy deposition of iron ore

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