Phase separation process preventing thermal embrittlement of a Zr-Cu-Fe-Al bulk metallic glass

Louzguine-Luzgin, Dmitri V.; Jiang, Jing; Базлов, А. И.; Zolotorevzky, V.S.; Mao, Haiyang; Ivanov, Yurii P.; Greer, A.L.

doi:10.1016/j.scriptamat.2019.03.030

Cited by 35 publications

(3 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This discrepancy may be explained by the following. In a previous investigation, it was observed that in an annealed Zr-Cr-Fe-Al BMG, secondary shear bands were localized in the vicinity of a dominant shear band after compression testing [52]. The above result was in contrast with the as-cast sample, where the shear bands were more widely distributed within the sample.…”

Section: Discussionmentioning

confidence: 86%

Relation Between the Defect Interactions and the Serration Dynamics in a Zr-Based Bulk Metallic Glass

et al. 2020

View full text Add to dashboard Cite

For this study, the effects of thermal annealing and compressive strain rate on the complexity of the serration behavior in a Zr-based bulk metallic glass (BMG) was investigated. Here, as-cast and thermally-annealed (300 °C, 1 week) Zr52.5Cu17.9Ni14.6Al10Ti5 BMG underwent room-temperature compression tests in the unconstrained condition at strain rates of 2 × 10−5 s−1 and 2 × 10−4 s−1. The complexity of the serrated flow was determined, using the refined composite multiscale entropy technique. Nanoindentation testing and X-ray diffraction characterization were performed to assess the changes in the microstructure and mechanical properties of the BMG that occurred during annealing. The results indicated that the BMG did not crystallize during annealing in the prescribed heating condition. Nanoindentation tests revealed that annealing led to a significant increase in the depth-dependent nanoindentation hardness and Young’s modulus, which were attributed to the structural relaxation in the glass. Furthermore, both annealing and an increased strain rate resulted in a marked enhancement in the complexity of the serrated flow during compression. It was concluded that the increase in the sample entropy with increasing strain rate is related to an increase in the number of defect interactions during the serrated flow.

show abstract

Section: Discussionmentioning

confidence: 86%

Relation Between the Defect Interactions and the Serration Dynamics in a Zr-Based Bulk Metallic Glass

et al. 2020

View full text Add to dashboard Cite

show abstract

“…6. This alloy system consists of atom pairs with a small positive heat of mixing in the liquid state: and Cu-Fe (+ 13 kJ mol -1 [48]) and Cu-Co (+ 6 kJ mol -1 [49]).…”

Section: Crystallization Temperature and Phase Separation In The Solid And Liquid Statementioning

confidence: 99%

Amorphous alloys and differential scanning calorimetry (DSC)

Janovszky

Svéda

Sycheva

et al. 2021

J Therm Anal Calorim

View full text Add to dashboard Cite

A remarkable number of scientific papers are available in the literature about the bulk amorphous alloys and metallic glasses. Today, DSC is an essential tool for amorphous alloys research and development, and of course for quality assurance. In many cases, users seek to examine the determination of only one or two properties, although much more information can be obtained from the measurements. The research involved structural relaxation, Curie temperature, glass temperature, crystallization, phase separation, nanocrystalline volume fraction, melting point and liquidus temperature determination subjects and kinetics of microstructural transformations induced by thermal treatment. We collected and present the information that can be obtained with this technique and draws the reader’s attention to some potential problems related to data interpretation.

show abstract

“…However, practical application of BMGs have been hindered in many cases, owing to their inhomogeneous plastic deformation 4,5 . To tackle this challenge, several methods such as chemical composition tuning, composite making or rejuvenating processes have been proposed [6][7][8][9][10] . Among them, rejuvenation process is an applicative technique, in which structural atomic excitation occurs and glassy material moves to higher energy state [11][12][13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Mechanical Attrition Treatment on Micro-mechanical Properties of ZrCuAlNi Bulk Metallic Glass

et al. 2021

View full text Add to dashboard Cite

In this work, surface mechanical attrition treatment (SMAT) was employed to rejuvenate ZrCuAlNi bulk metallic glass (BMG) plate. Differential scanning calorimetry (DSC), atomic force microscopy (AFM) and nanoindentation analyses were carried out to evaluate stored energy and micro-mechanical properties of treated BMGs. According to DSC results, 10 min SMAT process increased the stored energy of BMG plates up to 50%. AFM analysis showed that the structural rejuvenation occurred in the bulk of samples and just a slight rejuvenation gradient was detected from the front to the back side of BMG plates. Nanoindentation analysis indicated that the structural rejuvenation is consistent with anelastic strain induced under the SMAT process. It was also found that an optimum treatment time is needed for maximum rejuvenation in the BMGs. This event is due to the fact that the glassy structure is able to store a critical anelastic strain, which leads to a saturated condition in rejuvenation.

show abstract

Phase separation process preventing thermal embrittlement of a Zr-Cu-Fe-Al bulk metallic glass

Cited by 35 publications

References 55 publications

Relation Between the Defect Interactions and the Serration Dynamics in a Zr-Based Bulk Metallic Glass

Relation Between the Defect Interactions and the Serration Dynamics in a Zr-Based Bulk Metallic Glass

Amorphous alloys and differential scanning calorimetry (DSC)

Effect of Surface Mechanical Attrition Treatment on Micro-mechanical Properties of ZrCuAlNi Bulk Metallic Glass

Contact Info

Product

Resources

About