Crystallization of a Zr-based metallic glass produced by laser powder bed fusion and suction casting

Ericsson, Anders; Pacheco, Victor; Marattukalam, Jithin James; Dalgliesh, Robert M.; Rennie, Adrian R.; Fisk, Martin; Sahlberg, Martin

doi:10.1016/j.jnoncrysol.2021.120891

Cited by 19 publications

(4 citation statements)

References 48 publications

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“…However, all these phases are rather brittle and do not favor ductility. [4] The average stiffness obtained for SB-H specimens is substantially lower in comparison to materials of the GB type. This can be correlated with higher rejuvenation levels and higher amorphicity in SB samples, both of which are supported by structural analyses.…”

Section: Mechanical Responsementioning

confidence: 90%

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Controlling the Glassy State toward Structural and Mechanical Enhancement: Additive Manufacturing of Bulk Metallic Glass Using Advanced Laser Beam Shaping Technology

Hadibeik,

Ghasemi‐Tabasi,

Burn

et al. 2023

Adv Funct Materials

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Bulk metallic glasses (BMGs) offer exceptional physical/mechanical properties enabling them to be highly desirable for a varietyof applications. Laser powder bed fusion (LPBF) has great promise for producing large and intricate BMG structures. However, using non‐optimal energy distribution in current additive manufacturing machines leads to extensive reheating of previously solidified layers. As a result, the mechanical characteristics can be significantly impacted by structural relaxation and partial crystallization. Here, a tunable advanced laser beam shaping technology is employed to overcome the difficulties originating from non‐optimal energy distribution in current additive manufacturing machines. This study fabricates fully amorphous/dense BMG samples using the shaped laser beam and established optimized atomic‐scale short‐and medium‐range ordering along with improved yield/fracture compressive strength. Formation of a shallow and wide melting pool geometry using the beam shaping allows to increase hatching distances to better control the thermal history introducing improved amorphicity and rejuvenation. This higher rejuvenation and disordering allow for increased atomic mobility, which facilitates the creation and spread of shear bands, thus enhancing the mechanical strength and ductility of the material. The current work demonstrates that BMG parts can be fabricated using flexible beam‐shaping technology allowing to go beyond the capabilities of state‐of‐the‐art additive manufacturing techniques.

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Section: Mechanical Responsementioning

confidence: 90%

“…[3] Casting as a promising process has been applied to produce a wide range of Fe-, Cu-, Ti-, and Zr-BMGs. [4][5][6][7][8][9][10][11] Nevertheless, the maximum diameter of the fabricated samples is limited within the range of millimeters [12,13] for the many technologically relevant alloy systems.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Glassy State toward Structural and Mechanical Enhancement: Additive Manufacturing of Bulk Metallic Glass Using Advanced Laser Beam Shaping Technology

Hadibeik,

Ghasemi‐Tabasi,

Burn

et al. 2023

Adv Funct Materials

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“…The various results show that SLM is a great choice for the fabrication of complex BMG parts, with no required post-processing steps except for surface finishing. Ericsson fitted the scattering data to a spherical particle model and it revealed a higher number density of particles and smaller average particle size in the SLM processed Zr 59.3 Cu 28.8 Al 10.4 Nb 1.5 material [134]. The high density of particles is due to the increased oxygen content of the material during SLM processing, which reduces the energy barrier of nucleation.…”

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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“…[ 6–8 ] and α‐Zr(O) ( P 6 3 / mmc ) [ 7 ] have been reported to form during processing. Other phases formed upon heating are CuZr 2 ( I 4/ mmm ), [ 5,6,11,22 ] Al 7 Cu 16 Zr 6 (

Fm\bar{3}m

), [ 5 ] Al 3 Zr 4 ( P 6/ mmm ), [ 6,11,22 ] and Al 2 Zr 3 . [ 6 ] The

Fd\bar{3}m

structure with (Cu,Ni) 2 Zr 4 O stoichiometry has also been reported to form in several other Zr‐based glass‐forming alloys, containing Cu and/or Ni.…”

Section: Introductionmentioning

confidence: 99%

In Situ Mapping of Phase Evolutions in Rapidly Heated Zr‐Based Bulk Metallic Glass with Oxygen Impurities

Tidefelt,

Löfstrand,

Goetz

et al. 2024

Advanced Science

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Metallic glasses exhibit unique mechanical properties. For metallic glass composites (MGC), composed of dispersed nanocrystalline phases in an amorphous matrix, these properties can be enhanced or deteriorated depending on the volume fraction and size distribution of the crystalline phases. Understanding the evolution of crystalline phases during devitrification of bulk metallic glasses upon heating is key to realizing the production of these composites. Here, results are presented from a combination of in situ small‐ and wide‐angle X‐ray scattering (SAXS and WAXS) measurements during heating of Zr‐based metallic glass samples at rates ranging from 102 to 104 Ks−1 with a time resolution of 4ms. By combining a detailed analysis of scattering experiments with numerical simulations, for the first time, it is shown how the amount of oxygen impurities in the samples influences the early stages of devitrification and changes the dominant nucleation mechanism from homogeneous to heterogeneous. During melting, the oxygen rich phase becomes the dominant crystalline phase whereas the main phases dissolve. The approach used in this study is well suited for investigation of rapid phase evolution during devitrification, which is important for the development of MGC.

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Crystallization of a Zr-based metallic glass produced by laser powder bed fusion and suction casting

Cited by 19 publications

References 48 publications

Controlling the Glassy State toward Structural and Mechanical Enhancement: Additive Manufacturing of Bulk Metallic Glass Using Advanced Laser Beam Shaping Technology

Controlling the Glassy State toward Structural and Mechanical Enhancement: Additive Manufacturing of Bulk Metallic Glass Using Advanced Laser Beam Shaping Technology

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

In Situ Mapping of Phase Evolutions in Rapidly Heated Zr‐Based Bulk Metallic Glass with Oxygen Impurities

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