Densification, microstructure and mechanical properties of an Al-14.1Mg-0.47Si-0.31Sc-0.17Zr alloy printed by selective laser melting

Bi, Jing; Lei, Zhenglong; Chen, Yanbin; Chen, Xi; Tian, Ze; Liang, Jingwei; Qin, Xikun; Zhang, Xinrui

doi:10.1016/j.msea.2020.138931

Cited by 51 publications

(23 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Studies on alloys with Mg/Zn have indicated that a moderate volumetric energy input (∼100 J mm −3 ) is ideal for the formation of >99% dense parts [45,77,78,80,81,89]. At energy inputs that are too low (∼<50 J mm −3 ), lack of fusion pores dominate; at energy inputs that are too high (∼>150 J mm −3 ), vaporisation of Zn/Mg increases the likelihood of keyhole pore formation [73,80,[89][90][91][92][93][94][95][96]. The present authors reiterate that the volumetric energy density model is too simplistic to capture the true physical processes occurring during AM processing and these specific values are rather arbitrary, especially when comparing between studies in which different build layer thicknesses are used [10]; however, it allows for useful, albeit less rigorous, comparison between differing studies and AM equipment on simple build geometries.…”

Section: Vaporisation Of Solute Elements and Porositymentioning

confidence: 99%

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Michi

Plotkowski

Shyam

et al. 2021

International Materials Reviews

134

View full text Add to dashboard Cite

Research on powder-based additive manufacturing of aluminium alloys is rapidly increasing, and recent breakthroughs in printing of defect-free parts promise substantial movement beyond traditional Al-Si-Mg) systems. One potential technological advantage of aluminium additive manufacturing, however, has received little attention: the design of alloys for use at T >~200°C, or~1/2 of the absolute melting temperature of aluminium. Besides offering lightweighting and improved energy efficiency through replacement of ferrous, titanium, and nickel-based alloys at 200-450°C, development of such alloys will reduce economic roadblocks for widespread implementation of aluminium additive manufacturing. We herein review the existing additive manufacturing literature for three categories of potential hightemperature alloys, discuss strategies for optimizing microstructures for elevatedtemperature performance, and highlight gaps in current research. Although extensive microstructural characterisation has been performed on these alloys, we conclude that evaluations of their high-temperature mechanical properties and corrosion responses are severely deficient.

show abstract

Section: Vaporisation Of Solute Elements and Porositymentioning

confidence: 99%

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Michi

Plotkowski

Shyam

et al. 2021

International Materials Reviews

134

View full text Add to dashboard Cite

show abstract

“…Since much of the energy is reflected or conducted away from the melt pool region, processing of these materials requires a very high beam energy to achieve a proper melt. The feasibility of fabricating Al alloys using laser powder bed fusion AM has been studied by many researchers [265][266][267][268][269][270][271][272][273][274][275][276][277][278][279][280][281][282][283][284]. Most of the research in the literature has been focused on optimizing the process to achieve quality parts.…”

Section: Laser-processed Al Alloysmentioning

confidence: 99%

Review of Powder Bed Fusion Additive Manufacturing for Metals

Ladani

Sadeghilaridjani

2021

Metals

View full text Add to dashboard Cite

Additive manufacturing (AM) as a disruptive technology has received much attention in recent years. In practice, however, much effort is focused on the AM of polymers. It is comparatively more expensive and more challenging to additively manufacture metallic parts due to their high temperature, the cost of producing powders, and capital outlays for metal additive manufacturing equipment. The main technology currently used by numerous companies in the aerospace and biomedical sectors to fabricate metallic parts is powder bed technology, in which either electron or laser beams are used to melt and fuse the powder particles line by line to make a three-dimensional part. Since this technology is new and also sought by manufacturers, many scientific questions have arisen that need to be answered. This manuscript gives an introduction to the technology and common materials and applications. Furthermore, the microstructure and quality of parts made using powder bed technology for several materials that are commonly fabricated using this technology are reviewed and the effects of several process parameters investigated in the literature are examined. New advances in fabricating highly conductive metals such as copper and aluminum are discussed and potential for future improvements is explored.

show abstract

“…Among all; PBF, BJ, MJ, and DED currently use spherical metal powders as a feedstock to obtain metallic components. For PBF processes [1,[3][4][5][6][7][8], the powder homogeneity is important since a smooth layer may provide decent properties. Homogeneity on the powder bed layer depends on powder properties such as size, cohesion, impurities, apparent/tapped density, moisture, shape, roughness, etc [9,10].…”

Section: Introductionmentioning

confidence: 99%

Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps

Vakifahmetoğlu

Hasdemir

2021

Preprint

View full text Add to dashboard Cite

This paper investigates the spreadability of the spherical CoCrWMo powder for Laser-Powder Bed Fusion (PBF-LB) by using image processing algorithms coded in MATLAB.Besides, it also aims to examine the spreadability correlation with the other characteristics such as flow rate, apparent density, angle of repose. Powder blends in four different particle size distributions are prepared, characterized, and spreadability tests are performed with the PBF-LB. The results demonstrate that an increase in fine particle ratio by volume (below 10 µm) enhances the agglomeration and decreases the flowability, causing poor spreadability.These irregularities on the spread layers are quantified with simple illumination invariant analysis.

show abstract

Densification, microstructure and mechanical properties of an Al-14.1Mg-0.47Si-0.31Sc-0.17Zr alloy printed by selective laser melting

Cited by 51 publications

References 45 publications

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Towards high-temperature applications of aluminium alloys enabled by additive manufacturing

Review of Powder Bed Fusion Additive Manufacturing for Metals

Spreadability of Metal Powders for Laser-Powder Bed Fusion via Simple Image Processing Steps

Contact Info

Product

Resources

About