Pulsed laser powder bed fusion additive manufacturing of A356

Chou, S.C.; Trask, M.; Danovitch, J.; Wang, Xianglong; Choi, Jin Nam; Brochu, Mathieu

doi:10.1016/j.matchar.2018.02.004

Cited by 24 publications

(6 citation statements)

References 27 publications

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“…The addition of magnesium to aluminum increases its strength through solid solution strengthening and also improves its strain hardening ability [ 10 ]. Although significant amount of works are published on AlSi 10 Mg, the research work on AlSi 12 and other Al-Si alloys, including A356 and A357, is still evolving [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ].…”

Section: 3d-printing Of Aluminium Alloys By Slmmentioning

confidence: 99%

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

et al. 2020

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Selective laser melting (SLM) is a powder bed fusion type metal additive manufacturing process which is being applied to manufacture highly customised and value-added parts in biomedical, defence, aerospace, and automotive industries. Aluminium alloy is one of the widely used metals in manufacturing parts in SLM in these sectors due to its light weight, high strength, and corrosion resistance properties. Parts used in such applications can be subjected to severe dynamic loadings and high temperature conditions in service. It is important to understand the mechanical response of such products produced by SLM under different loading and operating conditions. This paper presents a comprehensive review of the latest research carried out in understanding the mechanical properties of aluminium alloys processed by SLM under static, dynamic, different build orientations, and heat treatment conditions with the aim of identifying research gaps and future research directions.

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Section: 3d-printing Of Aluminium Alloys By Slmmentioning

confidence: 99%

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

et al. 2020

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“…However, during L-PBF the effect of a pulsing laser source has not been thoroughly examined and any work done to date has been focused on aluminium and titanium alloys [23,24]. A pulsating heat source has been shown to lead to a less columnar grain structure in aluminium alloys due to significantly higher cooling rates [24,27]. Similar material response has been found in titanium alloys with the higher cooling rates leading to lower number of columnar grains [24,28].…”

Section: Introductionmentioning

confidence: 99%

The influence of pulsed laser powder bed fusion process parameters on Inconel 718 material properties

Georgilas

Khan

Kartal

2020

Materials Science and Engineering: A

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In this work, the effect of pulsed laser used during the powder bed fusion (L-PBF) additive manufacturing (AM) process on Inconel 718 (IN718) material properties has been investigated. Argon gas atomised (AGA) IN718 powder is characterised in terms of flow, density, particle size distribution and morphology. Powder shows mostly spherical morphology with Hausner ratio of 1.17 indicating good flow characteristics. Density optimisation trials are carried out by varying laser power and exposure time. Fabricated samples are characterised in terms of porosity by area fraction analysis using light microscopy and volume fraction analysis using X-ray microcomputed tomography (micro-CT). Minimum porosity of 0.16% is achieved for laser power of 200 W and exposure time of 110 μs. Microstructural analysis using the Electron Backscatter Diffraction (EBSD) technique shows limited columnar grain structure in the Z direction and more equiaxed type grains in the XY direction (normal to the Z direction). Tensile test results show 754 MPa yield strength, 1070 MPa ultimate tensile strength and ~24% elongation. Finally, hole drilling residual stress measurements show increase from ~0 MPa to over 450 MPa in tensile stress up to a depth of 1 mm from the top surface of the as-build L-PBF IN718 sample. It has been found that laser pulsing produces higher homogeneity in grain structure and better mechanical properties than that by the continuous laser method.

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“…Using the layer-by-layer approach, this process is repeated until the complete fabrication of a part. [1][2][3][4] LPBF processing of various materials including DOI: 10.1002/adfm.202309304 aluminum [5][6][7] copper, [8][9][10] CoCrMo, [11][12][13] nickel, [14][15][16] steel, [17,18] and titanium alloys [19,20] have been studied.…”

Section: Introductionmentioning

confidence: 99%

Crack‐Free Tungsten Fabricated via Laser Powder Bed Fusion Additive Manufacturing

Ramakrishnan,

Kumar,

Kumar

et al. 2023

Adv Funct Materials

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Additive manufacturing of tungsten (W) is challenging due to its high melting point, high thermal conductivity, oxidation tendency, and brittleness from grain boundary (GB) oxides. In this study, the processing of W through laser powder bed fusion is investigated. Parts are fabricated under argon (Ar) and nitrogen (N2) atmospheres using the same processing parameters. The part produced in Ar has cracks with oxide precipitates decorating the fractured GBs. On the other hand, crack‐free W samples are produced under N2 atmosphere without any additional process modification. In both cases, the oxygen (O) content in the LPBF samples is similar to the starting powder. Interestingly, the analysis of the samples fabricated in nitrogen suggests that nitrogen is retained beyond the equilibrium solid solubility limit, while high‐resolution electron micrographs of fractured surfaces reveal reduced levels of oxides at GBs. Increased hardness for samples processed under N2 atmosphere is observed. Density Functional Theory (DFT) calculations performed to study the influence of interstitial nitrogen on oxygen diffusion in W indicated a hindrance to O diffusion from the presence of dissolved N.

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Pulsed laser powder bed fusion additive manufacturing of A356

Cited by 24 publications

References 27 publications

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

The influence of pulsed laser powder bed fusion process parameters on Inconel 718 material properties

Crack‐Free Tungsten Fabricated via Laser Powder Bed Fusion Additive Manufacturing

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