Rapid and partial crystallization to design ductile CuZr-based bulk metallic glass composites

Song, Kai; Han, Xiaolei; Pauly, S.; Qin, Yusheng; Kosiba, Konrad; Peng, Chuan; Gong, Junbo; Chen, P.X.; Wang, L.; Sarac, Baran; Ketov, S.V.; Mühlbacher, Marlene; Spieckermann, Florian; Kaban, I.; Eckert, J.

doi:10.1016/j.matdes.2017.11.008

Cited by 48 publications

(16 citation statements)

References 51 publications

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“…In the current study, the flash Joule heating of the Cu 47.5 Zr 47.5 Al 5 metallic glass leads to its devitrification into two phases: metastable B2 CuZr and equilibrium Cu 10 Zr 7 . This finding is in contrast to the equilibrium phase diagram [39] and some experimental as well as theoretical studies on the devitrification sequence of CuZr-based metallic glasses [33,35,38,40]. Based on theoretical considerations, Kaban et al suggested that the Cu 47.5 Zr 47.5 Al 5 metallic glass devitrifies following the sequence Cu 10 Zr 7 →CuZr 2 →B2 CuZr [40].…”

Section: Resultsmentioning

confidence: 85%

“…Some further examples of composite-structured materials based on metallic glasses can be found in [30][31][32]. It is important to note that, usually, phase transformations in metallic glasses occur rapidly and, thus, rapid annealing methods have to be used in order to control these transformations.Recently, flash-annealing techniques based on Joule [20], inductive [33,34], and electromagnetic radiation [35] heating were reported as tools for controllable tuning of the microstructure in metallic glass ribbons and bulk samples, respectively, aiming to improve their mechanical properties. Both techniques were applied to CuZr-based metallic glasses, which were partially devitrified into the metastable B2 CuZr structure to form glass-matrix composites.…”

mentioning

confidence: 99%

“…Recently, flash-annealing techniques based on Joule [20], inductive [33,34], and electromagnetic radiation [35] heating were reported as tools for controllable tuning of the microstructure in metallic glass ribbons and bulk samples, respectively, aiming to improve their mechanical properties. Both techniques were applied to CuZr-based metallic glasses, which were partially devitrified into the metastable B2 CuZr structure to form glass-matrix composites.…”

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confidence: 99%

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Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

et al. 2020

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Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes in the samples. The effect of heating rate and annealing time on the volume fraction of the crystalline phases and mechanical properties of the nanocomposites was studied in detail. Particularly, an increase of the heating rate and a decrease of the annealing time lead to a lower number of equilibrium Cu10Zr7 precipitates and an increase of tensile ductility. Tailoring of these non-equilibrium microstructures and mechanical properties may not be possible unless one starts with a fully glassy material that opens new perspectives for designing metastable nanomaterials with unique physical properties.

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Section: Resultsmentioning

confidence: 85%

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confidence: 99%

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confidence: 99%

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Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

et al. 2020

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Section: Introductionmentioning

confidence: 99%

“…Based on the concept of transformation-induced plasticity (TRIP), CuZr-based BMG composites were developed by introducing the ductile, shape memory B2 CuZr phase into the glassy matrix [20][21][22][23][24][25][26]. Such BMG composites exhibit high strength and good plasticity together with obvious work-hardening under compressive and tensile loading conditions [20][21][22][23][24][25][26]. In order to promote the further development of such shape memory BMG composites, a lot of research has been devoted to applying this concept to other glass-forming compositions [27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Martensitic Transformation and Plastic Deformation of TiCuNiZr-Based Bulk Metallic Glass Composites

Sun

Song

Han

et al. 2018

Metals

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In this study, the microstructural evolution and mechanical properties of TiCuNiZr-based bulk metallic glass (BMGs) composites were systematically investigated in order to optimize both the strength and the ductility of BMGs. By tailoring the glass-forming compositions, TiCuNiZr-based BMG composites with different volume fractions of B2 (Ti,Zr)(Cu,Ni) crystals precipitating in the glassy matrix exhibit not only macroscopic ductility but also high strength as well as work-hardening, which is due to the formation of multiple shear bands and martensitic transformation during deformation. Optimized mechanical properties can be achieved when the crystalline volume fraction is at least higher than 44 vol. %, which is attributed to the sizeable difference between Young's moduli of the B2 (Ti,Zr)(Cu,Ni) crystals and the glassy matrix, and the precipitation of Ti 2 Cu intermetallic compounds at the B2 crystal boundaries. Our study provides a complementary understanding of how to tailor mechanical properties of TiCu-based BMG composites.

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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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Rapid and partial crystallization to design ductile CuZr-based bulk metallic glass composites

Cited by 48 publications

References 51 publications

Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

Martensitic Transformation and Plastic Deformation of TiCuNiZr-Based Bulk Metallic Glass Composites

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

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