The origins for tensile properties of selective laser melted aluminium alloy A357

Rao, J. Babu; Zhang, Yong; Fang, Xi‐Ya; Chen, Yu; Wu, Xinhua; Davies, Chris

doi:10.1016/j.addma.2017.08.007

Cited by 61 publications

(44 citation statements)

References 59 publications

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“…An additional effect of higher percentage of columnar grains in 90 • specimens as compared to 0 • ones, similar to the findings by Hadadzadeh et al [15], cannot be excluded. Other authors previously observed a mixed quasi-cleavage and dimpled morphology on the fracture surfaces of A356 tensile samples, in the as-cast condition or after T6, as well as of A357 produced by LPBF [18,19]. Jiang Wen-Ming et al, found that the dimpled morphology is dispersed uniformly under the T6 condition, compared to the as-cast condition.…”

Section: Resultsmentioning

confidence: 90%

Additive Manufactured A357.0 Samples Using the Laser Powder Bed Fusion Technique: Shear and Tensile Performance

Denti

2018

Metals

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New aluminium alloys, with lower silicon content than in the first-developed formulations, have recently been introduced in the field of Additive Manufacturing and are dedicated to automotive applications. As they are relatively new, mechanical characterization under standard protocols of the automotive field are of utmost scientific as well as industrial relevance. The paper addresses the mechanical properties and microstructure of A357.0. Static tensile and shear tests of samples built by Laser Powder Bed Fusion, with different orientations in the machine work volume, have been performed. The aim was to identify possible anisotropy in the tensile and shear behaviour of this innovative alloy. Particularly for shear, the effect of adhesion between the layers onto shear strength was studied. Results analysis, by means of statistical tools, allows for the affirmation that no tensile modulus or yield strength anisotropy is observed. Instead, a small (yet statistically significant) increase in both shear- and tensile strength and a decrease in ductility are obtained as the direction of the specimens approaches the growth direction. Scanning Electron Microscope (SEM) observation of the failure mechanisms assisted in the interpretation of the results, by relating different failure modes to the relative orientation of loads versus the directions of inherent anisotropy in Laser Powder Bed Fusion processes.

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Section: Resultsmentioning

confidence: 90%

Additive Manufactured A357.0 Samples Using the Laser Powder Bed Fusion Technique: Shear and Tensile Performance

Denti

2018

Metals

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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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“…Rao et al [10] indicate that the possible origin of the silicon polyhedrons is due to an oversaturation of the solid solution aluminum in the silicon in the as-built temper; this is likely related to the rapid cooling. Thus, the solubility of silicon in the solid solution aluminum exceeds 1.6% by weight (this value is nevertheless the maximum limit of the solubility in the aluminum at the eutectic temperature), eventually reaching values of approx.…”

Section: T6 Tempermentioning

confidence: 99%

Study of AlSi7Mg0.6 Alloy by Selective Laser Melting: Mechanical Properties, Microstructure, Heat Treatment

Mauduit

Gransac²,

Auguste³

et al. 2019

jcme

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This study presents a panorama of the AlSi7Mg0.6 (A357) aluminum alloy in additive manufacturing by selective laser melting. The document is mainly interested in the metallurgical tempers obtained after manufacture and after heat treatment; it quickly cover the process. The results concerning the material integrity (porosity), mechanical properties, microstructures, residual stresses, etc., are presented in order to best define the technological capacities of these metallurgical tempers: as-built, soft annealed, T6, and artificial aging. Some information on the mechanisms and kinetics of precipitation is also presented using the Johnson-Mehl-Avrami-Kolmogorov model. Finally, the conclusion proposes an inventory (advantages/disadvantages) of the metallurgical tempers obtained to better understand the industrial applications.

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The origins for tensile properties of selective laser melted aluminium alloy A357

Cited by 61 publications

References 59 publications

Additive Manufactured A357.0 Samples Using the Laser Powder Bed Fusion Technique: Shear and Tensile Performance

Additive Manufactured A357.0 Samples Using the Laser Powder Bed Fusion Technique: Shear and Tensile Performance

Mechanical Properties of SLM-Printed Aluminium Alloys: A Review

Study of AlSi7Mg0.6 Alloy by Selective Laser Melting: Mechanical Properties, Microstructure, Heat Treatment

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