Microstructural mechanisms of tuning the deformation behaviors in annealed metallic glasses

Li, Mingfei; Wang, Dapeng; Malomo, Babafemi; Yang, Liang

doi:10.1016/j.jallcom.2021.160029

Cited by 10 publications

(5 citation statements)

References 83 publications

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“…The large H / E value indicating that the material has high resist plastic deformation, and the most durable MGs can be used for many applications, which were annealed at different times individually to obtain heat-dependent surface properties. The mechanical properties observed in this research are comparable to the previous works. , …”

Section: Resultssupporting

confidence: 90%

“…With respect to elastic behavior, describing the metallic glass properties not only by hardness and modulus but also by using a hardness/modulus ( H / E ) ratio indicating the elastic strain to failure. 2 The average H / E ratio was also increased as the annealing time increases, as shown Figure S3 . The H / E ratio indicates the plasticity of sample deformation.…”

Section: Resultsmentioning

confidence: 87%

“…The elastic modulus improved from 142.49 to 162.64 with an increasing annealing time (figure S2). With respect to elastic behavior, describing the metallic glass properties not only by hardness and modulus but also by using a hardness/modulus ( H / E ) ratio indicating the elastic strain to failure . The average H / E ratio was also increased as the annealing time increases, as shown Figure S3.…”

Section: Resultsmentioning

confidence: 99%

“…Bulk metallic glasses (BMGs) are the focus of demanding research areas for researchers around the world . BMGs are structurally amorphous metallic alloys, and their compositions are mixed to avoid crystallization during cooling from the melt . BMGs exhibit extraordinary outstanding properties, such as high elasticity, high hardness, appreciable toughness, good tribology prosperity, and superior corrosion resistance .…”

Section: Introductionmentioning

confidence: 99%

“… 1 BMGs are structurally amorphous metallic alloys, and their compositions are mixed to avoid crystallization during cooling from the melt. 2 BMGs exhibit extraordinary outstanding properties, such as high elasticity, 3 high hardness, appreciable toughness, good tribology prosperity, 4 and superior corrosion resistance. 5 In addition, due to the lack of long-range atomic order in BMGs, they exhibit exceptional mechanical and physicochemical properties, 6 related to conventional crystalline metallic materials, making them a promising class of engineering materials.…”

Section: Introductionmentioning

confidence: 99%

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Annealing Effect on Mechanical and Tribological Behaviors of Nanoscale Mechanics of Zr₆₀Cu₂₅Al₅Ag₅Ni₅ Thin-Layer Metallic Glasses for Engineering Materials Applications

Muhabie,

Girma

2023

ACS Omega

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A new and unique alloy formulation design strategy has been developed in order to fabricate thin-layered metallic glasses (TLMGs) with superior fracture resistance and low coefficient of friction (COF) during the nanoscratching test. Due to the outstanding properties, TFMG could be applied for different uses, such as for surface coating, biomedical, bioimprinting, electronic devices, spacecraft, and railway, all of which need surface fracture resistance. The fabricated Zr-based metallic glass was prepared from Zr, Al, Cu, Ni, and Ag above 99.9 Wt % in purity by arch melting techniques. TFMGs were coated on silicon wafer by sputtering the vapor deposition method from bulk metallic glass then annealed below glass transition temperature T g ∼ 450 °C for 10, 30, and 60 min. Nanoindentation and nanoscratch tests were used to investigate nanomechanical and nanotribological properties, and atomic force microscopy (AFM) was used to examine the surface morphology and microstructures of TLMG. The nanoindentation data indicated that the average hardness of metallic glasses increased from 9.75 (as-cast MG) to 13.4 GPa (annealed for 60 min). Coefficients of friction for the cast sample, annealed for unannealed, 10, 30, and 60 min, were 0.062, 0.049, 0.039, and 0.03, respectively, as well as the wear depths were 201. 56, 148.43, 37.32, and 25.27 nm, respectively. These studies show that the coefficient of friction and wear rate decreases when the annealing time increases as a result of atomic reordering and structural relaxation that occurred at longer annealing times. Furthermore, continuous wear process, wear depth, wear track volume, and contact area decrease with increasing annealing time. This study can be used to design protocols to prepare novel TLMGs, which have outstanding mechanical and tribological properties for engineering materials applications.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%