Metallic glass formation in multicomponent (Ti, Zr, Hf, Nb)–(Ni, Cu, Ag)–Al alloys

Kim, Kb B.; Warren, P. J.; Cantor, B.

doi:10.1016/s0022-3093(02)02002-1

Cited by 53 publications

(31 citation statements)

References 5 publications

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“…By comparing the data of the samples prepared by the two different methods, it can be seen that, within experimental error, the T x1 and ⌬H x1 are nearly identical, but the T x2 of the MS glass shifted toward higher temperature by about 10 K with respect to the MA glassy alloy, whereas the ⌬H x2 of the former is about one third smaller than that of the latter. In addition, the ⌬T x value of the MS glass is 53 K and not as large as 103 K given by Kim et al 19,20 Also, it is about 27 K less than that of the MA glassy alloy. As indicated by the TEM observation, the presence of unreacted nanocrystals in the MA product will result in a small composition deviation of the formed glassy phase from the nominal one of the alloy.…”

Section: Resultsmentioning

confidence: 67%

“…33 Hf 0.33 ) 50 (Ni 0. 33 Cu 0.33 Ag 0.33 ) 40 Al 10 alloy was reported to be 103 K. 19,20 The Ti 20 Zr 20 Hf 20 Cu 20 Ni 20 glass exhibited a high compressive fracture strength of 1920 MPa. 21 Consequently, it is of interest to investigate whether milling-induced glass formation is achievable in the alloys containing several components with equal proportions but without any major elements.…”

Section: Introductionmentioning

confidence: 99%

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Glass formation in a (Ti, Zr, Hf)–(Cu, Ni, Ag)–Al high-order alloy system by mechanical alloying

Zhang

Shen

2003

J. Mater. Res.

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In this work, glass formation under high-energy ball milling was investigated for a (Ti 0.33 40 Al 10 high-order alloy system with equiatomic substitution for early and late transition-metal contents. For comparison, an amorphous alloy ribbon with the same composition was prepared using the melt-spinning method as well. Structural features of the samples were characterized using x-ray diffraction, transmission electron microscopy, and differential scanning calorimetry. Mechanical alloying resulted in a glassy alloy similar to that obtained by melt spinning. However, the glass formation was incomplete, and a small amount of unreacted crystallites smaller than 30 nm in size still remained in the final ball-milled product. Like the melt-spun glass, the ball-milled glassy alloy also exhibited a distinct glass transition and a wide supercooled liquid region of about 80 K. Crystallization of this high-order glassy alloy proceeded through two main stages. After the primary nanocrystallization was completed, the remaining amorphous phase also behaved as a glass, showing a detectable glass transition and a large supercooled liquid region of about 100 K.

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Section: Resultsmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Glass formation in a (Ti, Zr, Hf)–(Cu, Ni, Ag)–Al high-order alloy system by mechanical alloying

Zhang

Shen

2003

J. Mater. Res.

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“…An early example of entropy enhancement of the solvent is in the field of BMG [99,100]. Based on the Zr-Al-Ni alloy, Cantor et al performed what they called equiatomic substitution and developed the (Ti33Zr33Hf33)100−x−y(Ni50Cu50)xAly alloys [101].…”

Section: Enhancing the Entropy Of Conventional Alloysmentioning

confidence: 99%

“…An early example of entropy enhancement of the solvent is in the field of BMG [99,100]. 20 Al 20 showed very good GFA, with a wide supercooled liquid region of 124 K [102].…”

Section: Enhancing the Entropy Of Conventional Alloysmentioning

confidence: 99%

Three Strategies for the Design of Advanced High-Entropy Alloys

Tsai

2016

Entropy

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High-entropy alloys (HEAs) have recently become a vibrant field of study in the metallic materials area. In the early years, the design of HEAs was more of an exploratory nature. The selection of compositions was somewhat arbitrary, and there was typically no specific goal to be achieved in the design. Very recently, however, the development of HEAs has gradually entered a different stage. Unlike the early alloys, HEAs developed nowadays are usually designed to meet clear goals, and have carefully chosen components, deliberately introduced multiple phases, and tailored microstructures. These alloys are referred to as advanced HEAs. In this paper, the progress in advanced HEAs is briefly reviewed. The design strategies for these materials are examined and are classified into three categories. Representative works in each category are presented. Finally, important issues and future directions in the development of advanced HEAs are pointed out and discussed.

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“…One simple method for developing the unknown multicomponent bulk metallic glass-forming alloys is to use equiatomic substitution on the basis of well known glass alloy compositions. 14) By applying equiatiomic substitution derived from the three empirical rules for BMG formation, 1) we present different type of Cu-Zr-based quaternary BMGs with the composition (Cu 0:5 Zr 0:5 ) 100Àx (Ti 0:5 Al 0:5 ) x , where x ¼ 0, 4, 6, 8, 10, 12. Quaternary Cu-Zr-Ti-Al alloys exhibit high GFA, and the maximum critical diameter reaches 7 mm.…”

Section: Introductionmentioning

confidence: 99%

Bulk Metallic Glass Formation near a Quaternary Cu-Zr-Ti-Al Eutectic Point

Zhang

Inoue

2006

Mater. Trans.

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The glass-forming ability (GFA) of the CuZr-based alloys with addition of equivalent atomic ratio of Ti and Al is investigated. We show that the addition of Ti and Al is effective to increase the GFA of the binary Cu 50 Zr 50 alloy. As the content of Ti and Al increases from 0 to 10 at%, the GFA of the quaternary Cu-Zr-based alloys increases. The critical diameter of the Cu 46 Zr 46 Ti 4 Al 4 and Cu 45 Zr 45 Ti 5 Al 5 alloys is up to 6 mm. Moreover, we found that the critical diameter of a glassy rod is 7 mm for the Cu 45:5 Zr 45:5 Ti 4:5 Al 4:5 alloy. The compositions of these alloys with high GFA are closer to a CuZrTiAl quaternary eutectic. However, much higher contents of Ti and Al lead to the precipitation of the simple TiAl phase, which degrades the GFA of the alloys.

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Metallic glass formation in multicomponent (Ti, Zr, Hf, Nb)–(Ni, Cu, Ag)–Al alloys

Cited by 53 publications

References 5 publications

Glass formation in a (Ti, Zr, Hf)–(Cu, Ni, Ag)–Al high-order alloy system by mechanical alloying

Glass formation in a (Ti, Zr, Hf)–(Cu, Ni, Ag)–Al high-order alloy system by mechanical alloying

Three Strategies for the Design of Advanced High-Entropy Alloys

Bulk Metallic Glass Formation near a Quaternary Cu-Zr-Ti-Al Eutectic Point

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