The correlation between β relaxation and shear transformation zone in LaNiAl bulk metallic glasses: The effect of cryogenic thermal cycling treatment

Liu, Z.; Huang, Ping; Fei, Wang

doi:10.1016/j.jallcom.2021.158993

Cited by 10 publications

(3 citation statements)

References 31 publications

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“…It is also should be noted that the decrease in the generation of defects and stored energy in S15 leads to the enhancement of hardness and Young's modulus than that analyzed in S10. From these results, it is concluded that the increase in stored energy in the amorphous solids is directly related to the rise in structural defects, heterogeneity and distribution of dynamic modulus, while it has an inverse correlation with the hardness and Young's modulus, which is also reported in other works 18,29,[37][38][39][40] . Finally, it should be noted that the SMAT time was in the range of 0 up to 15 min with 5-min intervals.…”

Section: Discussionsupporting

confidence: 80%

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

et al. 2021

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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.

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Section: Discussionsupporting

confidence: 80%

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

et al. 2021

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“…This result clearly indicates that the minor addition enhances the possibility of multiple shear banding events with small sizes, leading to a more homogenous plasticity in the MG. As a general assumption, the percolation of nanoscale shear transformation zones (STZs) is responsible for the creation and propagation of micro-scale shear banding events in the glassy structures. [46][47][48] In an amorphous material with the multiple shear events and lower derivatives (S5 and S6), the structural heterogeneity and loosely packed regions are intensified and the shear events are activated and propagated in a multiple mode, leading to an improved plasticity in the structure. alloying composition (S6), the population of shear bands increases around the indenting area and the width of shear events is extended.…”

Section: Methodsmentioning

confidence: 99%

Role of compositional changes on thermal, magnetic, and mechanical properties of Fe-P-C-based amorphous alloys

Raya¹,

Chupradit²,

Kadhim³

et al. 2022

Chinese Phys. B

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This work aimed to tune the comprehensive properties of Fe-P-C-based amorphous system through investigating the role of microalloying process on the crystallization behavior, glass forming ability (GFA), soft magnetic features, and mechanical properties. Considering minor addition of elements into the system, it was found that the simultaneous microalloying of Ni and Co leads to the highest GFA, which was due to the optimization of compositional heterogeneity and creation of near-eutectic composition. Moreover, the FeCoNiCuPC amorphous alloy exhibited the best anelastic/viscoplastic behavior under the nanoindentation test, which was owing to the intensified structural fluctuations in the system. However, the improved plasticity by the extra Cu addition comes at the expense of magnetic properties, so that the saturation magnetization of this alloying system is significantly decreased compared to the FeCoPC amorphous alloy with the highest soft magnetic properties. In total, the results indicated that a combination of added elemental constitutes, i.e., Fe69Co5Ni5Cu1P13C7 composition, provides an optimized state for the comprehensive properties in the alloying system.

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“…Table S1: The STZ volumes and Poisson’s ratios of reported BMGs. References [ 41 , 42 , 45 , 46 , 47 , 49 , 53 , 54 , 55 , 56 , 57 , 59 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 ] are cited in the supplementary materials.…”

mentioning

confidence: 99%

Applicability of Pre-Plastic Deformation Method for Improving Mechanical Properties of Bulk Metallic Glasses

et al. 2022

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Pre-plastic deformation (PPD) treatments on bulk metallic glasses (BMGs) have previously been shown to be helpful in producing multiple shear bands. In this work, the applicability of the PPD approach on BMGs with different Poisson’s ratios was validated based on experimental and simulation observations. It was found that for BMGs with high Poisson’s ratios (HBMGs, e.g., Zr56Co28Al16 and Zr46Cu46Al8), the PPD treatment can easily trigger a pair of large plastic deformation zones consisting of multiple shear bands. These PPD-treated HBMGs clearly display improved strength and compressive plasticity. On the other hand, the mechanical properties of BMGs with low Poisson’s ratios (LBMG, e.g., Fe48Cr15Mo14Y2C15B6) become worse due to a few shear bands and micro-cracks in extremely small plastic deformation zones. Additionally, for the PPD-treated HBMGs with similar high Poisson’s ratios, the Zr56Co28Al16 BMG exhibits much larger plasticity than the Zr46Cu46Al8 BMG. This phenomenon is mainly due to more defective icosahedral clusters in the Zr56Co28Al16 BMG, which can serve as nucleation sites for shear transformation zones (STZs) during subsequent deformation. The present study may provide a basis for understanding the plastic deformation mechanism of BMGs.

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The correlation between β relaxation and shear transformation zone in LaNiAl bulk metallic glasses: The effect of cryogenic thermal cycling treatment

Cited by 10 publications

References 31 publications

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

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

Role of compositional changes on thermal, magnetic, and mechanical properties of Fe-P-C-based amorphous alloys

Applicability of Pre-Plastic Deformation Method for Improving Mechanical Properties of Bulk Metallic Glasses

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