Development of a nanostructure microstructure in the Al–Ni system using the electrospark deposition process

Heard, D.W.; Brochu, Mathieu

doi:10.1016/j.jmatprotec.2010.02.001

Cited by 34 publications

(15 citation statements)

References 24 publications

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“…where C is the capacitance in Farad (F) and V is the voltage in Volt (V); while F is the discharge frequency in Hertz (Hz) [26]. In Table 2 are shown the values of the spark pulse Energies used for processing the samples whereas increasing values of the V, C, and F subscript indicate increasing values of the respective parameters.…”

Section: Methodsmentioning

confidence: 99%

“…Among them, there are Fe-based alloys [21], superalloys [22][23][24], and magnesium alloys [25]. Heard and Brochu [26] determined that ESD is a feasible method of producing an aluminum-nickel deposit, consisting of a nano-structured Al3Ni phase. Cadney and Brochu [27] investigated the feasibility of using the ESD process to deposit amorphous electrode material (Zr41.2Ti13.8Ni10Cu12.5Be22.5) onto an amorphous substrate of the same composition without crystallizing the deposit or the substrate.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Direct Metal Deposition of AA2024 by ElectroSpark for Coating and Reparation Scopes

2017

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ElectroSpark Deposition (ESD) is a pulsed micro-welding process that is capable of depositing wear and corrosion resistance deposit to repair, improve, and to extend the service life of the components and tools. Major new applications have taken place in gas turbine blades and steam turbine blade protection and repair, and in military, medical, metal-working, and recreational equipment applications. In this study, the ESD technique was exploited to fabricate 2024 aluminum alloy deposit on a similar substrate. The deposits were deposited using different process parameters. Heat input was varied on three levels. The outcoming microstructure was analyzed by optical and scanning electron microscopies. The deposit was characterized by the overlapping of layers with a mixed microstructure. The average hardness was independent from the process parameters. Both porosity inside the deposits and cracks at the deposit/substrate interface were detected. The porosity lowered with the heat input and increased the average length of cracks.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of the Direct Metal Deposition of AA2024 by ElectroSpark for Coating and Reparation Scopes

2017

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“…Indeed, the thickness increases with deposition pulse energy, ranging from 82.6 µm for the deposit produced at the lowest energy to 407.6 µm for the deposit produced at the highest E s . This is due to the increased amount of material being transferred at higher spark energy (E s ) [41], that rises the deposit growth rate (GR). Therefore, for a given number of deposited layers, the increasing of E s , lead also to a reduced deposition time.…”

Section: Effect Of the Electric Parameters On Mechanical Properties Amentioning

confidence: 99%

Effect of ElectroSpark Process Parameters on the WE43 Magnesium Alloy Deposition Quality

2019

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This research aims to investigate the effects of process parameters on the quality of WE43 coatings deposited on homologue substrate by ElectroSpark Deposition (ESD) technology. ESD is new technology used to apply coatings or for the restoration and refurbishment of worn or damaged high valued parts. The depositions were processed using five different levels of Energy input (Es, Spark Energy). The microstructure of both the base material and deposits cross-section were characterized by optical and scanning electron microscopies. Also, X-ray diffraction technique was used. In addition, stereological studies of the through-thickness heterogeneities of the deposits (e.g., voids) were performed. The mechanical properties were evaluated by Vickers micro-hardness. The results show that the deposits exhibited a fine grained microstructure due to the rapid solidification. The average micro-hardness values of the deposits are lower than that of the substrate and distributed in a small range (49-60 HV). The lower hardness of the deposits respect to the base material is due to the presence of defectiveness such as spherical, laminar and random shaped voids. The defects area percentage inside the deposits remains well below than 11%. All the deposits were mainly affected by laminar morphology defects. The results indicate that the deposits defectiveness decreases as the energy input increases.

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“…More recently, these coatings were oxidized by using a DC plasma oxidation technique to grow alumina films, which despite being the metastable gamma alumina, it presented very good barrier properties [59]. Lower interest has been devoted to the Ni-Al system where instead pure alloyed layers, Ni-Cr-NiAl [60] and Al-NiAl 3 [61], have been produced.…”

Section: Electrospark Depositionmentioning

confidence: 99%

Transition Metal Aluminide Coatings and Initial Steps on Additive Manufacturing

Luis¹

2018

Intermetallic Compounds - Formation and Applications

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During the last decades, Fe-, Ni-and Ti-based aluminides have been studied in terms of bulk materials with an effort to develop alloying and processing strategies to overcome their low ductilities and toughness compared to conventional alloys. Whenever significant improvements can be addressed in this direction, they will be opened to an extensive range of industrial applications, especially those related to high temperature resistance requirements. In parallel, progressing interest has also been focused on their application as protective layers. This chapter is intended to provide a review of the evolution that has been made mainly during the last two decades of the several coating technologies devoted for this purpose. From thick to thin coatings are revised, with insight into coating microstructures and properties as well. Lack of space has forced the selection of those technologies arising most interest within last years; therefore, the content will follow this order: joining (laser cladding and electrospark deposition), thermal spraying (high velocity oxygen fuel and cold spraying) and physical vapor deposition (magnetron sputtering and cathodic arc deposition).

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Development of a nanostructure microstructure in the Al–Ni system using the electrospark deposition process

Cited by 34 publications

References 24 publications

Study of the Direct Metal Deposition of AA2024 by ElectroSpark for Coating and Reparation Scopes

Study of the Direct Metal Deposition of AA2024 by ElectroSpark for Coating and Reparation Scopes

Effect of ElectroSpark Process Parameters on the WE43 Magnesium Alloy Deposition Quality

Transition Metal Aluminide Coatings and Initial Steps on Additive Manufacturing

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