Enhancing the plasticity of a Ti-based bulk metallic glass composite by cryogenic cycling treatments

Du, Yin; Han, Weichao; Zhou, Qin; Xu, Yuhao; Zhai, Hua; Bhardwaj, Vipul; Wang, Haifeng

doi:10.1016/j.jallcom.2020.155247

Cited by 29 publications

(13 citation statements)

References 40 publications

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“…It can be found that DH relax increases firstly from 2.58 J g -1 (C0) to 5.43 J g -1 (C30), and then decreases to 4.03 J g -1 (C50) with the increasing cycling times (Fig. 3b), which is consistent with Du et al [25] and Ketov et al [21]. Generally, it is well known that the structural relaxation is essentially the annihilation of free volumes, that is, the variation of the DH relax value means the change in the free volume density inside the amorphous alloy.…”

Section: Microstructure and Thermal Stabilitysupporting

confidence: 90%

“…For the plastic strain, it can be seen that the the plastic strain increases from 0.09% (C0) to 1.14% (C30), and then decreases to 0.37% (C50) with the increasing cycling times, being different Ketov et al [22] who fond that the plasticity of Zr 62 Cu 24 Fe 5 Al 9 BMG continuously increases with the increasing times of CCTs. Nevertheless, the evolution trend of plastic strain is consistent with the Ti 48 Zr 20 V 12 Cu 5 Be 15 and Ti 48 Zr 20 Nb 12 Cu 5 Be 15 BMG composites [25]. This may be due to the fact that the current commercial Vit 1 BMG contains intermetallics, which makes its mechanical performance close to the BMG composites, rather than the pure amorphous alloys.…”

Section: Mechanical Propertiessupporting

confidence: 59%

“…3a). All the above XRD and DSC results indicate that the CCTs do not significantly change the nature of the amorphous state of Vit 1 BMG as well as its the crystallization behavior [25]. However, it need be noted that the CCTs lead to a decrease in the DT x value with the increasing cycling times.…”

Section: Microstructure and Thermal Stabilitymentioning

confidence: 77%

“…This is mainly because the CCTs make the Vit 1 BMG to be in a metastable state with higher energy, and it is easier to crystallize during heating to reach a stable state with lower energy [26]. Moreover, it also has been verified that the occurrence of exothermic phenomenon prior to the glass transtion temperature (T g ) is related to the structural relaxation inside BMGs [23,[25][26][27][28][29]. From the inset enlarged curves in Fig.…”

Section: Microstructure and Thermal Stabilitymentioning

confidence: 85%

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Improving the wear performance of a commercial Vit 1 amorphous alloy by a cryogenic cycling treatment

Zhai

et al. 2021

J Mater Sci

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A commercial Vit 1 amorphous alloy was processed by a cryogenic cycling treatment of different times. The phase structure, thermal, mechanical and wear properties were studied. Although the cryogenic cycling treatment does not change significantly the phase structure, it promotes thermal rejuvenation, i.e., the heterogeneity of the internal structure. The heterogeneous structure promotes initiation of multiple shear bands within the amorphous alloy to bring about dissipative deformation energy, which in turn increases the plasticity. Thanks to the plasticization, the wear properties were significantly improved by the cryogenic cycling treatment. In particular, the wear rate after 30 cycles of treatment (7.55 9 10 -5 mm 3 /N m) decreases to about one third of the as-cast alloy (22.75 9 10 -5 mm 3 /N m). The reason is that with the increase in plasticity, the wear mechanism of Vit 1 BMG changes from three-body abrasive wear to a synergistic mechanism of three-body abrasive wear and oxidative wear. Therefore, improving the plasticity of amorphous alloys by the cryogenic cycling treatment could be an effectively strategy to enhance the wear perfermance.

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Section: Microstructure and Thermal Stabilitysupporting

confidence: 90%

Section: Mechanical Propertiessupporting

confidence: 59%

Section: Microstructure and Thermal Stabilitymentioning

confidence: 77%

Section: Microstructure and Thermal Stabilitymentioning

confidence: 85%

See 2 more Smart Citations

Improving the wear performance of a commercial Vit 1 amorphous alloy by a cryogenic cycling treatment

Zhai

et al. 2021

J Mater Sci

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“…If the number of such interfaces in the material is large enough, the interaction of the shear bands in multiple sliding systems will result in a more uniform stress distribution [189]. Under the action of these multiplying and interacting shear bands, the amorphous phase and β phase may undergo coordinated deformation during the indentation process, which will greatly improve the plasticity of the material [190].…”

Section: Zr-based Bmgsmentioning

confidence: 99%

Research progress on selective laser melting (SLM) of bulk metallic glasses (BMGs): a review

Zhang

Tan

Tian

et al. 2021

Int J Adv Manuf Technol

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Bulk metallic glasses (BMGs) are a subject of interest due to their superior specific properties such as low coefficient of friction, high strength, large ductility in bending, high elastic modulus, high microhardness, and high resistance to corrosion, oxidation, wear, and so on. However, BMGs are difficult to apply in industry due to their difficulty in manufacturing and secondary operation. In the past few decades, many efforts have been carried out to overcome the defects in the manufacturing of BMGs. It is difficult to fabricate complex structures with the whole amorphous alloy owing to the limit of crystallization and critical cooling rate. Additive manufacturing (AM), such as selective laser melting (SLM), can obtain relatively high cooling rates during the “layer-by-layer” process, which makes it possible to surpass the dimensional limitation of metallic glass. In the SLM process, the high-speed cooling of molten pool and the avoidance of secondary processing are very beneficial to the production and application of amorphous alloys. In this paper, based on the research of SLM additive manufacturing BMGs in recent years, the factors affecting crystallization and forming ability are discussed from many aspects according to different material systems. The status and challenges of SLM manufacturing BMGs including Fe-based, Zr-based, Al-based, and some composite-based BMGs will be presented. Mechanical properties and physicochemical properties were introduced. This review aims to introduce the latest developments in SLM additive manufacturing BMGs, especially on the development of process parameters, structure formation, simulation calculation, fracture mechanism, and crystallization behavior. With the traditional fabricating methods, BMGs were mainly used as a structure material. It will provide another alternative to use BMGs as a functional material by introducing SLM technology in amorphous preparation with complex geometry. This review summarizes the technical difficulty and application prospects of BMGs preparation by SLM and discusses the challenges and unresolved problems. This review identifies key issues that need to be addressed in this important field in the future. These problems are related to the application of BMGs as high-strength structural materials and new functional materials in the future.

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Nanoscopic tribological characteristics of a cryogenically cycled Zr-based metallic glass

Jia,

Xia,

Zhou

et al. 2024

Sci. China Phys. Mech. Astron.

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Enhancing the plasticity of a Ti-based bulk metallic glass composite by cryogenic cycling treatments

Cited by 29 publications

References 40 publications

Improving the wear performance of a commercial Vit 1 amorphous alloy by a cryogenic cycling treatment

Improving the wear performance of a commercial Vit 1 amorphous alloy by a cryogenic cycling treatment

Research progress on selective laser melting (SLM) of bulk metallic glasses (BMGs): a review

Nanoscopic tribological characteristics of a cryogenically cycled Zr-based metallic glass

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