Effect of TiB2 particles on microstructure and crystallographic texture of Al-12Si fabricated by selective laser melting

Xi, L.; Wang, Pei; Prashanth, Konda Gokuldoss; Li, H.; Prykhodko, H.V.; Scudino, Sergio; Kaban, I.

doi:10.1016/j.jallcom.2019.01.327

Cited by 98 publications

(39 citation statements)

References 24 publications

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“…More recently, Xie et al [248] studied the effect of TiB 2 during selective laser melting of Al-12Si. The remarkable efficiently of TiB 2 to refine the microstructure is evident in Fig.…”

Section: In Additive Manufacturingmentioning

confidence: 99%

“…15. Microstructure in after selective laser melting of Al-12Si alloy: (a) without TiB 2 ; (b) with TiB (from [248]). any high hardness ceramic particle, with good wettability in the molten surrounding alloy, thermodynamic stability and high melting point can be used as a reinforcement during fusion-based additive manufacturing.…”

Section: In Additive Manufacturingmentioning

confidence: 99%

See 1 more Smart Citation

Revisiting fundamental welding concepts to improve additive manufacturing: From theory to practice

Oliveira

Santos

Miranda

2020

Progress in Materials Science

467

134

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Additive manufacturing technologies based on melting and solidification have considerable similarities with fusion-based welding technologies, either by electric arc or high-power beams. However, several concepts are being introduced in additive manufacturing which have been extensively used in multipass arc welding with filler material. Therefore, clarification of fundamental definitions is important to establish a common background between welding and additive manufacturing research communities. This paper aims to review these concepts, highlighting the distinctive characteristics of fusion welding that can be embraced by additive manufacturing, namely the nature of rapid thermal cycles associated to small size and localized heat sources, the non-equilibrium nature of rapid solidification and its effects on: internal defects formation, phase transformations, residual stresses and distortions. Concerning process optimization, distinct criteria are proposed based on geometric, energetic and thermal considerations, allowing to determine an upper bound limit for the optimum hatch distance during additive manufacturing. Finally, a unified equation to compute the energy density is proposed. This equation enables to compare works performed with distinct equipment and experimental conditions, covering the major process parameters: power, travel speed, heat source dimension, hatch distance, deposited layer thickness and material grain size.

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“…More recently, Xie et al [248] studied the effect of TiB 2 during selective laser melting of Al-12Si. The remarkable efficiently of TiB 2 to refine the microstructure is evident in Fig.…”

Section: In Additive Manufacturingmentioning

confidence: 99%

Section: In Additive Manufacturingmentioning

confidence: 99%

Revisiting fundamental welding concepts to improve additive manufacturing: From theory to practice

Oliveira

Santos

Miranda

2020

Progress in Materials Science

467

134

View full text Add to dashboard Cite

show abstract

“…For instance, the melt pool will be solidifying over a solid substrate or on a preexisting solid SLM layer on the bottom. The melt pool is further surrounded by solidified nascent metal on one/two sides, powder on one/two sides, liquid melt pool on one side, and, finally, inert gas on the top . Similar cooling conditions may not be observed in any other manufacturing processes except EBM, where crystallographic texture is also a common phenomenon.…”

Section: State Of Artmentioning

confidence: 82%

Design of next‐generation alloys for additive manufacturing

Gokuldoss

2019

Mat Design & Process Comms

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Additive manufacturing (AM) processes are gaining more and more attention due to the interest from all sectors (industries, researchers, and scientists). Selective laser melting (SLM) is one of the AM processes that is widely used because of its ability to process a wide variety of materials. However, by and large, only conventional materials are fabricated using SLM, and there exists a technological gap, where new alloys should be developed suiting the AM processes. This technological gap is briefly reviewed, and possible solutions to bridge the technological gap will be introduced.

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“…Hence, SLM is considered to allow for a considerable reduction in fuel emissions, which confers the process of an outstanding ecological performance making it a green technology for the future [ 30 ]. The SLM process has already made a considerable impact in the manufacturing, automobile, aerospace, pharmaceutical, electronics, and sports sectors [ 31 , 32 ] because of its ability to produce a wide variety of materials (metals, alloys, cermets, composites) without any theoretical restrictions [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ].…”

Section: Introductionmentioning

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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Effect of TiB2 particles on microstructure and crystallographic texture of Al-12Si fabricated by selective laser melting

Cited by 98 publications

References 24 publications

Revisiting fundamental welding concepts to improve additive manufacturing: From theory to practice

Revisiting fundamental welding concepts to improve additive manufacturing: From theory to practice

Design of next‐generation alloys for additive manufacturing

Selective Laser Melting of Aluminum and Its Alloys

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