Thermal stability and crystallization of a Zr-based metallic glass produced by suction casting and selective laser melting

Pacheco, Victor; Karlsson, Dennis; Marattukalam, Jithin James; Stolpe, Moritz; Hjörvarsson, Bjørgvin; Jansson, Ulf; Sahlberg, Martin

doi:10.1016/j.jallcom.2020.153995

Cited by 62 publications

(45 citation statements)

References 59 publications

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“…99-007-0147, orthorhombic Aba2) and Al 2 Zr 3 (PDF No. 99-007-0063, tetragonal P4 2 /mnm) could crystallize as quoted by other researchers previously [ 41 ]. In addition, as the starting powder material showed a high oxygen content, CuO (PDF No.…”

Section: Resultsmentioning

confidence: 53%

“…Bordeenithikasem et al [ 15 ] showed that crystallization of AMZ4 resulted in the increase of brittleness and reduction of flexural strength. In addition, Pacheco et al [ 41 ] and Marattukalam et al [ 43 ] detected crystallization in AMZ4. However, there is no report on the formation of ductile crystals during the crystallization of AMZ4 in the literature, which could improve the ductility of the fabricated parts.…”

Section: Discussionmentioning

confidence: 99%

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Tensile and Impact Toughness Properties of a Zr-Based Bulk Metallic Glass Fabricated via Laser Powder-Bed Fusion

et al. 2021

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In the past few years, laser powder-bed fusion (LPBF) of bulk metallic glasses (BMGs) has gained significant interest because of the high heating and cooling rates inherent to the process, providing the means to bypass the crystallization threshold. In this study, (for the first time) the tensile and Charpy impact toughness properties of a Zr-based BMG fabricated via LPBF were investigated. The presence of defects and lack of fusion (LoF) in the near-surface region of the samples resulted in low properties. Increasing the laser power at the borders mitigated LoF formation in the near-surface region, leading to an almost 27% increase in tensile yield strength and impact toughness. Comparatively, increasing the core laser power did not have a significant influence. It was therefore confirmed that, for BMGs like for crystalline alloys, near-surface LoFs are more detrimental than core LoFs. Although increasing the border and core laser power resulted in a higher crystallized fraction, detrimental to the mechanical properties, reducing the formation of LoF defects (confirmed using micro-computed tomography, Micro-CT) was comparatively more important.

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Section: Resultsmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Tensile and Impact Toughness Properties of a Zr-Based Bulk Metallic Glass Fabricated via Laser Powder-Bed Fusion

et al. 2021

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“…The first attempt to used SLM to fabricate fully amorphous BMG components under the appropriate conditions was carried out by Pauly et al [388] in 2013. Since then, several other BMGs based on Fe [388][389][390][391][392][393][394][395][396], Al [397][398][399][400], Zr [401][402][403][404][405][406][407][408][409][410][411][412][413][414], Cu [415,416], Pd [417], and Ti [418] have been fabricated using the laser PBF process. A sample made of Fe-based BMGs as large as 45 mm in diameter and 20 mm in length was fabricated by Wang et al [419].…”

Section: Bulk Metallic Glasses (Bmgs)mentioning

confidence: 99%

“…The crystallization kinetic of BMG fabricated using SLM may also differ from the as-cast sample due to partially crystallized HAZ and the relaxation of the melt pool. For example, the amorphous alloys prepared using SLM exhibited lower thermal stability than the as-cast samples attributed to the pre-existing crystalline in the SLMed sample [403]. In another study, Best et al [420] observed a small elliptical distortion in the two-dimensional diffraction patterns of an SLM-built Zr-based BMG (Zr 59.3 Cu 28.8 Nb 1.5 Al 10.4 ) along the building direction, indicating variation in local strain at different positions.…”

Section: Microstructural Characterization and Part Quality Of Powder Bed Fusion Additive Manufactured Bmgsmentioning

confidence: 99%

Review of Powder Bed Fusion Additive Manufacturing for Metals

Ladani

Sadeghilaridjani

2021

Metals

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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.

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“…The results show that reheating of the consolidated material and higher oxygen content lead to the formation of (e) bar thicknesses [91] nanocrystals in the SLM component. This is because the density produced by SLM is lower than that of as-cast [131]. Ouyang studied two representative BMG alloys with different GFA, Zr 55 Cu 30 Ni 5 Al 10 (named as Zr55 with high GFA), and Zr 60.14 Cu 22.31 Fe 4.85 Al 9.7 Ag 3 (named as ZrAg with low GFA) metallic glass by SLM [132].…”

Section: Crystallization In Slmmentioning

confidence: 99%

Research progress on selective laser melting (SLM) of bulk metallic glasses (BMGs): a review

Zhang

Tan

Tian

et al. 2021

Int J Adv Manuf Technol

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Bulk metallic glasses (BMGs) are a subject of interest due to their superior specific properties such as low coefficient of friction, high strength, large ductility in bending, high elastic modulus, high microhardness, and high resistance to corrosion, oxidation, wear, and so on. However, BMGs are difficult to apply in industry due to their difficulty in manufacturing and secondary operation. In the past few decades, many efforts have been carried out to overcome the defects in the manufacturing of BMGs. It is difficult to fabricate complex structures with the whole amorphous alloy owing to the limit of crystallization and critical cooling rate. Additive manufacturing (AM), such as selective laser melting (SLM), can obtain relatively high cooling rates during the “layer-by-layer” process, which makes it possible to surpass the dimensional limitation of metallic glass. In the SLM process, the high-speed cooling of molten pool and the avoidance of secondary processing are very beneficial to the production and application of amorphous alloys. In this paper, based on the research of SLM additive manufacturing BMGs in recent years, the factors affecting crystallization and forming ability are discussed from many aspects according to different material systems. The status and challenges of SLM manufacturing BMGs including Fe-based, Zr-based, Al-based, and some composite-based BMGs will be presented. Mechanical properties and physicochemical properties were introduced. This review aims to introduce the latest developments in SLM additive manufacturing BMGs, especially on the development of process parameters, structure formation, simulation calculation, fracture mechanism, and crystallization behavior. With the traditional fabricating methods, BMGs were mainly used as a structure material. It will provide another alternative to use BMGs as a functional material by introducing SLM technology in amorphous preparation with complex geometry. This review summarizes the technical difficulty and application prospects of BMGs preparation by SLM and discusses the challenges and unresolved problems. This review identifies key issues that need to be addressed in this important field in the future. These problems are related to the application of BMGs as high-strength structural materials and new functional materials in the future.

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Thermal stability and crystallization of a Zr-based metallic glass produced by suction casting and selective laser melting

Cited by 62 publications

References 59 publications

Tensile and Impact Toughness Properties of a Zr-Based Bulk Metallic Glass Fabricated via Laser Powder-Bed Fusion

Tensile and Impact Toughness Properties of a Zr-Based Bulk Metallic Glass Fabricated via Laser Powder-Bed Fusion

Review of Powder Bed Fusion Additive Manufacturing for Metals

Research progress on selective laser melting (SLM) of bulk metallic glasses (BMGs): a review

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