Effect of deep cryogenic cycling treatment on the microstructure and mechanical properties of Ti-based bulk metallic glass

Lv, Jingwang; Wang, F.L.; Yin, Dawei; Zhang, S.; Shi, Zhijun; Ma, Mingzhen; Zhang, X.Y.

doi:10.1016/j.jallcom.2021.161386

Cited by 20 publications

(5 citation statements)

References 51 publications

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“…), experimental technologies, calculation methods, and so on. For instance, in Zr-based BMGs, simulations and experimental observations based on the statistical analysis of the first pop-in data give STZ volumes of approximately 0.2~0.4 nm 3 [ 53 ], while the STZ volumes calculated based on the rate-dependent hardness data are estimated to be 1~16 nm 3 [ 46 , 54 , 55 , 56 , 57 ] ( Figure 6 a). As shown in Figure 6 b, when the calculation method is fixed, the STZ volume exhibits a strong loading rate-dependence or tip radius-dependence during nanoindentation.…”

Section: Discussionmentioning

confidence: 99%

“… ( a ) Correlation between the STZ volumes and Poisson’s ratios in different systems BMGs (Red arrow indicates the increasing tendency), ( b ) the change in the STZ volumes with increasing loading rate or tip radius during nanoindentation [ 42 , 53 ], ( c ) correlation between the STZ volumes and plastic strains [ 54 , 59 ], and ( d ) the increased enthalpy before T g after cold rolling [ 60 , 61 ]. …”

Section: Figurementioning

confidence: 99%

“…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.…”

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confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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

et al. 2022

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“…Deep cryogenic treatment (DCT) has been successfully applied in steels [13][14][15][16][17] and non-ferrous metals such as titanium alloys [18][19][20] and aluminum alloys [21][22][23]. Zhou et al [22] have found that DCT could reduce the residual stress of aluminum alloy components by 72.7%, and proposed a possible reason that the residual stress generated during the sample's re-heating from cryogenic temperature may partly balance the existing residual stress after quenching.…”

Section: Introductionmentioning

confidence: 99%

Effect of Deep Cryogenic Treatment on the Artificial Ageing Behavior of SiCp–AA2009 Composite

Wang

Chen

Liu

et al. 2022

Metals

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The effect of deep cryogenic treatment (DCT) on the artificial ageing kinetics of a SiC particles reinforced aluminum alloy composite (SiCp-Al) is experimentally studied in this paper. The evolutions of both macro-properties (i.e., yield strength and ultimate tensile strength) and microstructures (precipitates) have been investigated by a set of hardness tests, tensile tests, and microstructural observations (scanning electron microscope, SEM and transmission electron microscope, TEM) for a SiCp-Al composite material with conventional heat treatment (solution heat treatment + quenching + artificial ageing, CHT) or DCT (solution heat treatment + quenching + deep cryogenic + artificial ageing). The results show that SiCp could significantly accelerate the ageing kinetics of the composites. Meanwhile, compared with CHT conditions, DCT can further improve the yield strength (YS) and ultimate tensile strength (UTS) of the composite materials after artificial ageing. The microstructures show that DCT induces the generation of more thinner θ’ precipitates homogeneously distributed in the grains during artificial ageing compared with corresponding CHT conditions. A quantified analysis has been performed based on the microstructural data, and the calculated results further support the indication that the strengthening effect in DCT compared with CHT is mainly contributed by corresponding precipitation behavior.

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“…The ultra-low temperature restrains the atomic motion and dislocation slip, causing the kinking of grains and mechanical twinning. Lv et al [22] investigated the effects of DCT on the mechanical behavior of bulk metallic glass. The samples exhibited a lower pop-in force and hardness after DCT because the densifiction of shear bands was promoted [23].…”

Section: Introductionmentioning

confidence: 99%

Effects of Deep Cryogenic Treatment on the Microstructure and Properties of Rolled Cu Foil

et al. 2021

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The development of fifth-generation (5G) communication and wearable electronics generates higher requirements for the mechanical properties of copper foil. Higher mechanical properties and lower resistance are required for flexible copper-clad laminate and high-frequency and high-speed Cu foil. Deep cryogenic treatment (DCT), as a post-treatment method, has many advantages, such as low cost and ease of operation. However, less attention has been paid to the impact of DCT on rolled Cu foil. In this study, the effects of DCT on the microstructure and mechanical properties of rolled Cu foil were investigated. The results show that as the treatment time increased, the tensile strength and hardness first increased and then decreased, reaching a peak value of 394.06 MPa and 1.47 GPa at 12 h. The mechanical property improvement of rolled Cu foil was due to the grain refinement and the increase of dislocation density. The dislocation density of rolled Cu foil after a DCT time of 12 h was determined to have a peak value of 4.3798 × 1015 m−2. The dislocation density increased by 19% and the grain size decreased by 12% after 12 h DCT.

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Effect of deep cryogenic cycling treatment on the microstructure and mechanical properties of Ti-based bulk metallic glass

Cited by 20 publications

References 51 publications

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

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

Effect of Deep Cryogenic Treatment on the Artificial Ageing Behavior of SiCp–AA2009 Composite

Effects of Deep Cryogenic Treatment on the Microstructure and Properties of Rolled Cu Foil

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