Laser metal deposition of nickel coated Al 7050 alloy

Singh, Amrinder; Ramakrishnan, A.; Baker, Dean; Biswas, Asit; Dinda, G.P.

doi:10.1016/j.jallcom.2017.05.171

Cited by 45 publications

(26 citation statements)

References 21 publications

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“…Singh et al reported a nickel-coated Al7050 alloy produced by laser metal deposition, a different additive manufacturing technique [ 186 ]. The Al7050 powder was coated with Ni to increase the absorption of photons from the laser in order to achieve a good quality of the deposit.…”

Section: Microstructurementioning

confidence: 99%

Selective Laser Melting of Aluminum and Its Alloys

et al. 2020

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The laser-based powder bed fusion (LBPF) process or commonly known as selective laser melting (SLM) has made significant progress since its inception. Initially, conventional materials like 316L, Ti6Al4V, and IN-718 were fabricated using the SLM process. However, it was inevitable to explore the possible fabrication of the second most popular structural material after Fe-based alloys/steel, the Al-based alloys by SLM. Al-based alloys exhibit some inherent difficulties due to the following factors: the presence of surface oxide layer, solidification cracking during melt cooling, high reflectivity from the surface, the high thermal conductivity of the metal, poor flowability of the powder, low melting temperature, etc. Researchers have overcome these difficulties to successfully fabricate the different Al-based alloys by SLM. However, there exists no review dealing with the fabrication of different Al-based alloys by SLM, their fabrication issues, microstructure, and their correlation with properties in detail. Hence, the present review attempts to introduce the SLM process followed by a detailed discussion about the processing parameters that form the core of the alloy development process. This is followed by the current research status on the processing of Al-based alloys and microstructure evaluation (including defects, internal stresses, etc.), which are dealt with on the basis of individual Al-based series. The mechanical properties of these alloys are discussed in detail followed by the other important properties like tribological properties, fatigue properties, etc. Lastly, an outlook is given at the end of this review.

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Section: Microstructurementioning

confidence: 99%

Selective Laser Melting of Aluminum and Its Alloys

et al. 2020

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“…The study concluded that the form accuracy of SLA samples was relatively poor, but their dimensional accuracy was better than that of DMLS. Several current studies [95,96] have included the investigation of properties for nickel-coated Al 7050 alloy. Bi and Gasser [97] investigated the restoration of nickelbased turbine blade knife edges with controlled LAAM and concluded that the LAAM process is feasible for the reconditioning of gas turbine blade knife edges.…”

Section: Nickel-based Alloy (Ni-based Alloy)mentioning

confidence: 99%

Review of materials used in laser-aided additive manufacturing processes to produce metallic products

et al. 2018

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Rapid prototyping (RP) or layered manufacturing (LM) technologies have been extensively used to manufacture prototypes composed mainly of plastics, polymers, paper, and wax due to the short product development time and low costs of these technologies. However, such technologies, with the exception of selective laser melting and sintering, are not used to fabricate metallic products because of the resulting poor life, short cycle, poor surface finish, and low structural integrity of the fabricated parts. The properties endowed by these parts do not match those of functional parts. Therefore, extensive research has been conducted to develop new additive manufacturing (AM) technologies by extending existing RP technologies. Several AM technologies have been developed for the fabrication of metallic objects. These technologies utilize materials, such as Ni-, Al-, and Ti-based alloys and stainless steel powders, to fabricate high-quality functional components. The present work reviews the type of materials used in laserbased AM processes for the manufacture of metallic products. The advantages and disadvantages of processes and different materials are summarized, and future research directions are discussed in the final section. This review can help experts select the ideal type of process or technology for the manufacturing of elements composed of a given alloy or material (Ni, Ti, Al, Pb, and stainless steel).

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“…Laser metal deposition (LMD), as a powder feeding laser additive manufacturing technology, has the ability to directly melt raw powder to make dense components via computer-aided design data [1,2]. Compared to conventional manufacturing techniques, such as casting, forging and machining processes, the LMD method is especially suitable for small batch production or repair of geometrically complex structures without the need for expensive molds, and this technology offers a promising perspective in the aerospace and transportation industries [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-Assisted Laser Metal Deposition of the Al 4047Alloy

Zhang

Guo

Chen

et al. 2019

Metals

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Ultrasonic-assisted laser metal deposition(UALMD) technology was used to fabricate Al 4047 parts. The effect of the powder feeding laser power, remelting laser power and ultrasonic power on the relative density of the parts was investigated. The relative density, microstructure and mechanical properties of the specimens obtained by the optimized process parameters were compared with the corresponding properties of the cast alloys. The results showed that dense alloys with a maximum density of 99.1% were prepared using ultrasonic vibration and by remelting the previously deposited layer with the optimized processing parameters, and its density was almost equivalent to that of the cast parts. The microstructure of the samples using optimal laser parameters presented columnar Al dendrites and equiaxed Si particles at the boundary of each deposited layer, while the supersaturated Al solid solution was transformed into equiaxed crystal surrounded by fine fibrous Si phases at the center of the layer. Moreover, the size of the primary Al and the Si particles in the samples produced by UALMD was remarkably refined compared to that of the primary Al and Si particles in the cast structure, resulting in grain refining strengthening. The observed variation in the microstructure had an obvious impact on the tensile properties. The mechanical behavior of the deposit obtained by UALMD revealed superior tensile strength, yield strength and tensile ductility values of 227 ± 3 MPa, 107 ± 4 MPa and 12.2 ± 1.4%, which were approximately 51%, 38% and 56% higher than those of the cast materials, respectively.

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Laser metal deposition of nickel coated Al 7050 alloy

Cited by 45 publications

References 21 publications

Selective Laser Melting of Aluminum and Its Alloys

Selective Laser Melting of Aluminum and Its Alloys

Review of materials used in laser-aided additive manufacturing processes to produce metallic products

Ultrasonic-Assisted Laser Metal Deposition of the Al 4047Alloy

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