Understanding the role of Er on glass-forming ability parameters and critical cooling rate in Fe‒based multicomponent bulk metallic glasses

AbstractThe crystallization behavior of a series of alloys in the Zr-Ti-Cu-Ni-Be system is studied. Upon cooling from the molten state with different rates, alloys with compositions ranging along a tie line from (Zr75Ti25)55(Ni45Cu55)22.5Be22.5 (Vit1) to (Zr85Ti15)55(Ni57Cu43)17.5Be27.5 (Vit4) show a continuous increase in the critical cooling rate to suppress crystallization. In contrast, thermal analysis of the same alloys shows that the undercooled liquid region, the temperature difference between the glass transition temperature and the crystallization temperature, is largest for compositions midway between the two endpoints, revealing that glass forming ability does not correlate with thermal stability. The relationship between the change in glass forming ability and thermal stability is discussed with reference to a chemical decomposition process.

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Exploring the Phase Space of Multi-Principal-Element Alloys and Predicting the Formation of Bulk Metallic Glasses

Entropy ◽

10.3390/e22030292 ◽

2020 ◽

Vol 22 (3) ◽

pp. 292 ◽

Cited By ~ 1

Author(s):

Mirko Gabski ◽

Martin Peterlechner ◽

Gerhard Wilde

Keyword(s):

Cooling Rate ◽

Metallic Glasses ◽

Random Number ◽

Structural Parameters ◽

Random Number Generator ◽

Bulk Metallic Glasses ◽

Computational Method ◽

Principal Element ◽

Critical Cooling Rate ◽

Glass Forming

Multi-principal-element alloys share a set of thermodynamic and structural parameters that, in their range of adopted values, correlate to the tendency of the alloys to assume a solid solution, whether as a crystalline or an amorphous phase. Based on empirical correlations, this work presents a computational method for the prediction of possible glass-forming compositions for a chosen alloys system as well as the calculation of their critical cooling rates. The obtained results compare well to experimental data for Pd-Ni-P, micro-alloyed Pd-Ni-P, Cu-Mg-Ca, and Cu-Zr-Ti. Furthermore, a random-number-generator-based algorithm is employed to explore glass-forming candidate alloys with a minimum critical cooling rate, reducing the number of datapoints necessary to find suitable glass-forming compositions. A comparison with experimental results for the quaternary Ti-Zr-Cu-Ni system shows a promising overlap of calculation and experiment, implying that it is a reasonable method to find candidates for glass-forming alloys with a sufficiently low critical cooling rate to allow the formation of bulk metallic glasses.

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Role of niobium and oxygen concentration on glass forming ability and crystallization behavior of Zr-Ni-Al-Cu-Nb bulk metallic glasses with low copper concentration

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2016.05.015 ◽

2016 ◽

Vol 445-446 ◽

pp. 88-94 ◽

Cited By ~ 9

Author(s):

K.M. Cole ◽

D.W. Kirk ◽

C.V. Singh ◽

S.J. Thorpe

Keyword(s):

Oxygen Concentration ◽

Metallic Glasses ◽

Crystallization Behavior ◽

Copper Concentration ◽

Bulk Metallic Glasses ◽

Glass Forming Ability ◽

Glass Forming

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The outstanding effect and mechanism of non-inert casting atmospheres on glass forming ability of P-containing Fe-based soft magnetic bulk metallic glasses

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.158991 ◽

2021 ◽

Vol 866 ◽

pp. 158991

Author(s):

Jianhua Zhang ◽

Chengzhong Zhang ◽

Xiaoxiong Zhang ◽

Zhien Li ◽

Aina He ◽

...

Keyword(s):

Metallic Glasses ◽

Bulk Metallic Glasses ◽

Glass Forming Ability ◽

Soft Magnetic ◽

Glass Forming

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Effects of Al replacement on glass forming ability and mechanical properties of Zr-based bulk metallic glasses

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2021.120962 ◽

2021 ◽

Vol 568 ◽

pp. 120962

Author(s):

Y. Tan ◽

Y.W. Wang ◽

X.W. Cheng ◽

Q. Fu ◽

Z.H. Xin ◽

...

Keyword(s):

Mechanical Properties ◽

Metallic Glasses ◽

Bulk Metallic Glasses ◽

Glass Forming Ability ◽

Glass Forming

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On Glass Forming Ability of Bulk Metallic Glasses by Relating the Internal Friction Peak Value

Metals ◽

10.3390/met10060767 ◽

2020 ◽

Vol 10 (6) ◽

pp. 767

Author(s):

Xianfeng Zhang ◽

Xiao Cui ◽

Zhuotong Du ◽

Fangqiu Zu ◽

Jinjing Li ◽

...

Keyword(s):

Internal Friction ◽

Metallic Glasses ◽

Bulk Metallic Glasses ◽

Glass Forming Ability ◽

Liquid Region ◽

Internal Friction Peak ◽

Glass Forming ◽

Constituent Elements ◽

Valid Criterion ◽

Peak Value

The internal friction (IF) behaviors of a series of LaCe-, Zr-, and La-based bulk metallic glasses (BMGs) were studied by a computer-controlled, conventional inverted torsion pendulum. The results indicate that with an increasing temperature, the IF also increases gradually in the supercooled liquid region, followed by a decrease caused by crystallization. BMGs with a good glass forming ability (GFA) usually possess a high IF peak value for an alloy system with the same constituent elements. Furthermore, the magnitude of the IF value (Qi−1) of the inflection point is an efficient criterion of GFA. The Qi−1 value is a valid criterion under the conditions of identical constituent elements and different element contents. However, Qi−1 and GFA have no relationship among different alloy systems.

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