Controllable additive manufacturing of gradient bulk metallic glass composite with high strength and tensile ductility

Lu, Yunzhuo; Su, Shuang; Zhang, Shengbiao; Huang, Yue; Qin, Zuoxiang; Lü, Xing; Chen, Wen

doi:10.1016/j.actamat.2021.116632

Cited by 94 publications

(33 citation statements)

References 63 publications

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“…[ 33 ] compared to Set B and Set C can be attributed to the presence of large and irregular porosities (LoFs) in the printed samples, which Best et al [ 33 ] showed by providing a Micro-CT image. Although our AMZ4 specimens were in “semi-as-built” condition (without any surface finishing), whereas the tensile specimens in Refs [ 34 , 35 , 36 , 37 ] were in a surface finished state, the present results position themselves among the best ones for BMGs fabricated via AM processes. Therefore, AMZ4 manufactured via LPBF can be a good candidate for applications where a high tensile yield strength is required.…”

Section: Discussionmentioning

confidence: 75%

“…Figure 7 plots our AMZ4 results together with those of Ref. [ 33 ], and four other Zr-based BMGs [ 34 , 35 , 36 , 37 ]. It is assumed that in Ref.…”

Section: Discussionmentioning

confidence: 98%

“…Since there is only one reported study [ 33 ] on the tensile properties of BMGs fabricated via LPBF, the present results were also compared to properties measured on BMGs fabricated via other AM methods, such as DED [ 34 , 35 , 36 , 37 ]. Figure 7 plots our AMZ4 results together with those of Ref.…”

Section: Discussionmentioning

confidence: 99%

“… Comparison of tensile yield strengths in the present study with a LPBF manufactured AMZ4 [ 33 ], and with DH3 (Zr 39.6 Ti 33.9 Nb 7.6 Cu 6.4 Be 12.5 ) [ 37 ], Zr BMG composite (Zr 39.6 Ti 33.9 Nb 7.6 Cu 6.4 Be 12.5 ) [ 34 ], Zr51 BMG (Zr 51 Ti 5 Ni 10 Cu 25 Al 9 ) [ 35 ], and Zr55 BMG (Zr 55 Cu 30 Al 10 Ni 5 ) [ 36 ] fabricated via direct energy deposition (DED). …”

Section: Figurementioning

confidence: 99%

“…They did not increase the input energy, which could decrease the formation of LoFs, to prevent crystallization. Tensile properties of BMGs, and BMG composites fabricated with another laser-based AM process, i.e., direct energy deposition (DED) [ 34 , 35 , 36 , 37 ] have been previously investigated. However, to the best of our knowledge, the influence of defects on the impact toughness of BMGs fabricated via AM has not been reported so far.…”

Section: Introductionmentioning

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: Discussionmentioning

confidence: 75%

“…Figure 7 plots our AMZ4 results together with those of Ref. [ 33 ], and four other Zr-based BMGs [ 34 , 35 , 36 , 37 ]. It is assumed that in Ref.…”

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

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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Additive Manufacturing of Bulk Metallic Glasses

Sahu,

Kumar

2024

Additive Manufacturing With Novel Materials

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High‐Entropy Alloy‐Induced Metallic Glass Transformation: Challenges Posed by in situ Alloying via Additive Manufacturing

et al. 2022

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In situ alloying and fabricating glassy structures through a layer‐by‐layer fashion approach are challenging but have high potential to develop novel‐graded materials. For the first time, this cost‐effective approach is applied to additive manufacturing (AM) of a Zr‐based bulk metallic glass (BMG) from high‐entropy alloys (HEAs). A newly developed composition of Zr40Al20Cu20Ti20 is fabricated through laser powder bed fusion (LPBF). Process parameters are optimized within a wide range of laser power (50–200 W) as well as scanning speed (50–800 mm s−1). In all printed samples, microscopic and compositional examinations reveal no glass formation, but very fine grains and CuTi and AlTi nanocrystals. Some glassy transitions at the interfaces may be encouraged to occur with proper melting and mixing. However, the main reason for not obtaining a glassy matrix is the substantial proportion of unmelted Zr raw powder throughout the structure as spherical particles. Consequently, glass formation can be hindered by a considerable amount of compositional deviation. During LPBF, in situ alloying poses significant challenges to developing BMGs. Hence, the various stages of the process, including raw material specifications, laser settings, and process parameters, should be investigated further.

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Controllable additive manufacturing of gradient bulk metallic glass composite with high strength and tensile ductility

Cited by 94 publications

References 63 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

Additive Manufacturing of Bulk Metallic Glasses

High‐Entropy Alloy‐Induced Metallic Glass Transformation: Challenges Posed by in situ Alloying via Additive Manufacturing

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