Compositional dependence of thermal, elastic, and mechanical properties in Cu–Zr–Ag bulk metallic glasses

Dong, Gang; Blauwe, Katrien De; Lind, Mary Laura; Schramm, Joseph P.; Johnson, William L.

doi:10.1016/j.scriptamat.2007.10.001

Cited by 65 publications

(35 citation statements)

References 30 publications

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“…Compared with Ti-Ni, the Zr-Ni couple is known to be more likely to frustrate the competing compounds and reach the glassy state. [47] As shown previously, the Ti(Zr)-Cu-Ni BMGs developed in the current work have a plasticity superior to other BMG systems, such as ZrCuAl [42] or CuZrAg, [31] let alone MgZnCa. [48] Obviously, such plasticity correlates with the intrinsic internal structure including shortrange order, medium-range order, and excessive volume in the glasses.…”

Section: Discussionsupporting

confidence: 67%

“…[28] Furthermore, a full determination of the optimized glassforming composition in a given ternary/quaternary system will be useful for composition tailoring to develop ductile BMGs, because the mechanical properties of BMGs are also composition-dependent. [29][30][31] In our previous work, new BMGs were found near the pseudo-binary eutectic (L fi TiCu + TiNi) composition in the Ti-Cu-Ni ternary system. The best glass former was determined to be Ti 50 Cu 43 Ni 7 , where glassy rods 1.5 mm in critical diameter (D c ) could be fabricated using the copper mold casting method.…”

Section: In the Family Of Bulk Metallic Glasses (Bmgs)mentioning

confidence: 86%

“…Similar to our results, it has been found recently that the CuZr (B2)-containing system can be more ductile than others. [31] Further work is needed to systematically validate if indeed the structure of the competing intermetallics involved can be used as an indicator to develop new ductile BMGs, while maintaining a modest critical size.…”

Section: Discussionmentioning

confidence: 99%

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Ti (Zr)-Cu-Ni Bulk Metallic Glasses with Optimal Glass-Forming Ability and Their Compressive Properties

Wang

2008

Metall Mater Trans A

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The formation of bulk metallic glasses (BMGs) was systematically investigated in the ternary Ti-Cu-Ni and quaternary Ti-Zr-Cu-Ni systems. Over a relatively wide composition range (50 to 57 at. pct Ti, 34 to 44 at. pct Cu, and 6 to 10 at. pct Ni) in the ternary Ti-Cu-Ni system, new Ti-based BMGs with a critical diameter of 1 mm have been discovered in the triangular region enclosed by the three intermetallic compounds TiNi, TiCu, and Ti 2 Cu. Partial substitution of Zr for Ti improved the glass-forming ability (GFA), and the BMGs of 3 mm in diameter were obtained in the composition range of 51 to 53 at. pct (Ti + Zr), 38 to 41 at. pct Cu, and 8 to 10 at. pct Ni. The enhanced GFA compared with the ternary Ti-Ni-Cu system was attributed to the effects of Zr on stabilizing the undercooled liquid. These Ti-based BMGs had compressive fracture strength higher than 2 GPa. Among them, the Ti 50 Cu 43 Ni 7 glass exhibited a reproducible plastic strain larger than 5 pct.

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Section: Discussionsupporting

confidence: 67%

Section: In the Family Of Bulk Metallic Glasses (Bmgs)mentioning

confidence: 86%

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Ti (Zr)-Cu-Ni Bulk Metallic Glasses with Optimal Glass-Forming Ability and Their Compressive Properties

Wang

2008

Metall Mater Trans A

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“…In order to get better statistics of the results, each measurement was repeated several times. The highest load before fracture was measured to be L = 160 N for Cu 50 Zr 50 glass which corresponds to an applied stress of r = 741 MPa well below the yield strength of 1.6 GPa reported for Cu-Zr BMGs [9] (L = 140 N was the highest load for the Cu 65 Zr 35 glass). The two-dimensional diffraction patterns were recorded at three different positions along the length of the ribbon.…”

Section: Methodsmentioning

confidence: 66%

Structural evolution of Cu–Zr metallic glasses under tension

et al. 2009

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The structural behaviour of Cu 50 Zr 50 and Cu 65 Zr 35 metallic glasses under uniaxial tensile stress was investigated in situ by high-energy X-ray synchrotron diffraction. The components of the elastic strain tensor were determined from both the change of positions of first maximum of the structure factor in reciprocal space as well as from the maxima of the atomic pair correlation function in real space. The atomic scale strain agrees with the macroscopic strain values. The topological and chemical short-range order of the Cu-Zr glasses changes upon loading. The number density of Cu-Zr and Zr-Zr nearest neighbour atomic pair becomes oriented along the loading direction whereas the partial nearest neighbour distances are only weakly influenced.

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“…Compared to crystalline materials, BMGs have a homogenous composition structure, i.e., an isotropy structure. Due to their special matrix structure, BMGs possess many excellent properties that crystalline materials lack and that can serve as potential structural and functional materials in the future in engineering applications, sports equipment, scientific research, and so on [9,10]. BMGs have been found in many different alloy groups, such as Pd-, Mg-, Ln-, Ti-, Fe-, Co-, Ni-, Ca-, Zr-, and Cu-based systems [3], and new alloys have been fabricated and reported with a variety of different properties.…”

Section: Introductionmentioning

confidence: 99%

The Evolution of Microstructures and the Properties of Bulk Metallic Glass with Consubstantial Composition Laser Welding

Tao

Zhang

et al. 2016

Metals

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A Zr 55 Cu 30 Ni 5 Al 10 plate-like bulk metallic glass (BMG) was prepared using copper mold suction casting. Additionally, alloy powders with the same nominal composition were synthesized. The alloy powders were welded or melted to the cleaned surface of the BMG with a laser beam acceleration voltage of 60 kV, a beam current range from 60 to 100 mA, a welding speed of 60 mm/s, as well as an impulse width of 3.0 ms. The effect of consubstantial composition welding on the microstructures and properties was investigated. The molten and subsequently solidified metallic mixtures remain an amorphous structure, but the enthalpy of the welded or melted position varies due to the combination of the micro-structural relaxation and nano-crystals precipitated during the energy inputs. The surface layers of the BMG can be significantly intensified after welding processes; however, the heat-affected zones (HAZs) exhibit a slight degradation in mechanical properties with respect to the BMG matrix. This study has important reference value for specialists working on the promotion of applications of BMGs.

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Compositional dependence of thermal, elastic, and mechanical properties in Cu–Zr–Ag bulk metallic glasses

Cited by 65 publications

References 30 publications

Ti (Zr)-Cu-Ni Bulk Metallic Glasses with Optimal Glass-Forming Ability and Their Compressive Properties

Ti (Zr)-Cu-Ni Bulk Metallic Glasses with Optimal Glass-Forming Ability and Their Compressive Properties

Structural evolution of Cu–Zr metallic glasses under tension

The Evolution of Microstructures and the Properties of Bulk Metallic Glass with Consubstantial Composition Laser Welding

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