Mechanical performance and corrosion behaviour of Zr-based bulk metallic glass produced by selective laser melting

Deng, Liang; Gebert, A.; Zhang, Long; Chen, H.Y.; Gu, Dongdong; Kühn, U.; Zimmermann, Martina; Kosiba, Konrad; Pauly, S.

doi:10.1016/j.matdes.2020.108532

Cited by 53 publications

(50 citation statements)

References 64 publications

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“…As pointed out by several works, the evolution of pores is inevitable during LPBF [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. It can arise during the powder deposition, from hollow powder particles and from the laser power distribution [ 8 ]. The relative density of the present LPBF-BMG samples was 98.7 ± 0.04%.…”

Section: Resultsmentioning

confidence: 99%

“…Since only small powder volumes are consecutively melted, high cooling rates (10 4 –10 6 K/s) are inherent to LPBF [ 6 ], which generally allows to process a wide variety of metallic glass forming alloys. The resulting BMGs are fabricated “layer-by-layer” with sheer unlimited geometrical freedom [ 5 , 7 , 8 ]. As a result, a variety of glass-forming compositions, including Al-, Fe-, Ti-, and Zr-based alloys [ 5 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ], have been successfully processed via LPBF in order to synthesize BMGs.…”

Section: Introductionmentioning

confidence: 99%

“…Multiple processing parameters must be correctly selected to fabricate not only amorphous, but also highly dense BMGs, since the presence of pores and cracks, as well as the formation of crystalline phases, must be avoided. In order to synthesize highly dense BMGs (>98% density [ 9 ]), extensive parameter studies have been carried out, particularly for Zr-based alloys, because of their good glass-forming ability [ 8 , 9 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…Aside from the microstructure, the mechanical properties of additively manufactured BMGs at room temperature have been and still are the focus of intense research. For example, the mechanical response of additively manufactured BMGs was investigated when subjected to uniaxial compressive loading [ 8 , 9 , 13 , 15 , 16 ] and bending [ 5 , 15 ]. Owing to residual porosity, which acts as a stress concentrator, BMGs fabricated via LPBF yield at lower stresses, show less plastic deformability, and have a lower fatigue threshold [ 15 ] than their amorphous counterparts prepared by conventional copper mold casting.…”

Section: Introductionmentioning

confidence: 99%

“…During LPBF processing, Zr-based glass-forming alloys are enriched in oxygen so that the resulting BMGs show a distinctly lower fracture toughness than cast BMGs [ 5 , 15 , 16 ]. By contrast, their wear and corrosion resistances are similar [ 8 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Viscous Flow of Supercooled Liquid in a Zr-Based Bulk Metallic Glass Synthesized by Additive Manufacturing

2020

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The constraint in sample size imposed by the critical cooling rate necessary for glass formation using conventional casting techniques is possibly the most critical limitation for the extensive use of bulk metallic glasses (BMGs) in structural applications. This drawback has been recently overcome by processing glass-forming systems via additive manufacturing, finally enabling the synthesis of BMGs with no size limitation. Although processing by additive manufacturing allows fabricating BMG objects with virtually no shape limitation, thermoplastic forming of additively manufactured BMGs may be necessary for materials optimization. Thermoplastic forming of BMGs is carried out above the glass transition temperature, where these materials behave as highly viscous liquids; the analysis of the viscosity is thus of primary importance. In this work, the temperature dependence of viscosity of the Zr52.5Cu17.9Ni14.6Al10Ti5 metallic glass fabricated by casting and laser powder bed fusion (LPBF) is investigated. We observed minor differences in the viscous flow of the specimens fabricated by the different techniques that can be ascribed to the higher porosity of the LPBF metallic glass. Nevertheless, the present results reveal a similar overall variation of viscosity in the cast and LPBF materials, which offers the opportunity to shape additively manufactured BMGs using already developed thermoplastic forming techniques.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Viscous Flow of Supercooled Liquid in a Zr-Based Bulk Metallic Glass Synthesized by Additive Manufacturing

2020

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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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Mechanical performance and corrosion behaviour of Zr-based bulk metallic glass produced by selective laser melting

Cited by 53 publications

References 64 publications

Viscous Flow of Supercooled Liquid in a Zr-Based Bulk Metallic Glass Synthesized by Additive Manufacturing

Viscous Flow of Supercooled Liquid in a Zr-Based Bulk Metallic Glass Synthesized by Additive Manufacturing

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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