scholarly journals Preparation, Characterization, and Properties of Novel Ti-Zr-Be-Co Bulk Metallic Glasses

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 223 ◽  
Author(s):  
Pan Gong ◽  
Fangwei Li ◽  
Junsong Jin
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glasses ◽  
Crystallization Behavior ◽  
Base Alloy ◽  
Bulk Metallic Glasses ◽  
Critical Diameter ◽  
Glass Forming Ability ◽  
Specific Strength ◽  
Glass Forming ◽  
Co Addition

We developed novel Ti-Zr-Be-Co bulk metallic glasses through Co addition based on a ternary Ti45Zr20Be35 alloy. By altering the alloying routes and alloying contents, the influence of Co alloying on glass-forming ability, thermal stability, thermoplastic formability, crystallization behavior, and corrosion resistance has been investigated systematically. It was found that the best alloying route for enhancing the glass-forming ability, thermoplastic formability, compressive plasticity, and corrosion resistance is to replace Be by Co. Ti45Zr20Be23Co12 possesses the largest critical diameter of 15 mm for glass formation. Ti45Zr20Be27Co8 possesses the highest thermoplastic formability which is comparable to that of Vitreloy alloys. Ti45Zr20Be25Co10 exhibits the largest room temperature plasticity of 15.7% together with a high specific strength of 3.90 × 105 Nm/kg. The addition of Co also strongly affects the crystallization behavior of the base alloy, resulting in a more complex crystallization process. The corrosion resistance of Ti-Zr-Be alloy in 1 mol/L HCl solution can also be enhanced by Co alloying. The related mechanisms have been explained in detail, which provide guidance for the composition design of Ti-based metallic glasses with improved properties.

Glass-forming ability and corrosion resistance of Zr-based Zr–Ni–Al bulk metallic glasses

2012 ◽  
Vol 536 ◽  
pp. S117-S121 ◽  
Author(s):  
Y.H. Li ◽  
W. Zhang ◽  
C. Dong ◽  
J.B. Qiang ◽  
G.Q. Xie ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming

Enhancement of glass-forming ability and corrosion resistance of Zr-based Zr-Ni-Al bulk metallic glasses with minor addition of Nb

2011 ◽  
Vol 110 (2) ◽  
pp. 023513 ◽  
Author(s):  
Yanhui Li ◽  
Wei Zhang ◽  
Chuang Dong ◽  
Chunling Qin ◽  
Jianbing Qiang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
Minor Addition

High Glass-Forming Ability and Unusual Deformation Behavior of New Zr-Cu-Fe-Al Bulk Metallic Glasses

2010 ◽  
Vol 654-656 ◽  
pp. 1042-1045 ◽  
Author(s):  
Qing Sheng Zhang ◽  
Wei Zhang ◽  
Dmitri V. Louzguine-Luzgin ◽  
Akihisa Inoue
Keyword(s):  
Metallic Glasses ◽  
Glassy Alloy ◽  
Bulk Metallic Glasses ◽  
Eutectic Point ◽  
Critical Diameter ◽  
Alloy System ◽  
Glass Forming Ability ◽  
Future Application ◽  
Heat Of Mixing ◽  
Glass Forming

A new series of bulk metallic glasses were developed by addition of Fe into the ternary Zr60Cu30Al10 alloy. Although Fe-Cu element pair shows distinct immiscibility with a large positive heat of mixing, substitution of Fe for Cu significantly improves the glass-forming ability of the ternary Zr60Cu30Al10 alloy. The critical diameter for glass-formation increases from 8 mm for Zr60Cu30Al10 alloy to 20 mm for Zr60Cu25Fe5Al10 and Zr62.5Cu22.5Fe5Al10 alloys. As compared with the ternary Zr60Cu30Al10 alloy, the new quaternary Zr-Cu-Fe-Al alloys show lower liquidus temperatures. The Zr60Cu25Fe5Al10 and Zr62.5Cu22.5Fe5Al10 alloys, the best BMG-formers in this alloy system, are found to locate very near a Zr-Cu-Fe-Al eutectic point. The new Zr-Fe-Cu-Al bulk metallic glasses exhibit high strength of about 1700 MPa. The plastic strain increases from 7.8% to 11.3% with increasing the content of Fe from 0 to 12.5%. The finding of a Ni-free Zr-based bulk glassy alloy with the extremely high glass-forming ability is expected to extend the future application of bulk metallic glasses.

Salt Spray Corrosion Performance Associated with the Glass Forming Ability of the FeCo-Based Bulk Metallic Glasses

2014 ◽  
Vol 618 ◽  
pp. 109-113
Author(s):  
Wei Jiang ◽  
Qing Jun Chen ◽  
Jun Shen ◽  
Fa Bi Zhang ◽  
Xian Liang Zhou ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glasses ◽  
Salt Spray ◽  
Bulk Metallic Glasses ◽  
Glass Forming Ability ◽  
Neutral Salt ◽  
Corrosion Properties ◽  
Corrosion Morphology ◽  
Salt Spray Corrosion ◽  
Glass Forming

For the bulk amorphous Fe24+xCo24-xCr15Mo14C15B6Y2(X=0, 2, 4, 6 and 17) alloy, the corresponding corrosion properties associated with glass forming ability (GFA) have been carried out. Neutral salt spray corrosion test results show that the Fe28Co20Cr15Mo14C15B6Y2 alloy has the minimum corrosion rate, followed by Fe26Co22Cr15Mo14C15B6Y2, Fe24Co24Cr15Mo14C15B6Y2, Fe30Co18Cr15Mo14C15B6Y2, Fe41Co7Cr15Mo14C15B6Y2 and Ti6Al4V alloys. Specifically, the Fe28Co20Cr15Mo14C15B6Y2 alloy with the highest GFA also has the best corrosion resistance. With the increasing of Co addition, the corrosion resistance of the FeCo-based bulk metallic glasses is first increases and then decreases, which has the same trend of GFA with the change of Co elements. Furthermore, corrosion morphology are different for FeCo-based BMGs with different Co content.

COMPOSITION DESIGN AND GLASS-FORMING ABILITY OF TI-BASED BULK METALLIC GLASSES

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2326-2331 ◽  
Author(s):  
LEI ZHAO ◽  
ZEQIANG ZHANG ◽  
JING ZHANG ◽  
SHUJIE PANG ◽  
CHAOLI MA ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Glassy Alloy ◽  
Bulk Metallic Glasses ◽  
Critical Diameter ◽  
Amorphous Structure ◽  
Glass Forming Ability ◽  
Liquid Region ◽  
Scanning Calorimetry ◽  
Composition Design ◽  
Glass Forming

Ti -based bulk metallic glasses (BMGs) have great potential for use as structural materials due to their excellent mechanical properties. How to fabricate Ti -based metallic glasses with sufficient large size has always been the key issue in both the theoretic and technology aspects since finding the BMG. In this paper, we try to fabricate Ti -based metallic glasses with high glass-forming ability (GFA) through composition design based on various empirical ideas. BMG alloy with composition of Ti 43.89 Cu 43.60 Zr 6.75 Ni 5.76 was synthesized based on the deep eutectic idea, and the critical diameter of this glassy alloy reaches to 2 mm. The GFA of this alloy was further improved by small addition of Si (0.5-1 at %). BMG rods with diameters up to 3mm were synthesized for compositions of Ti 42.89 Cu 43.60 Zr 6.75 Ni 5.76 Si 1, Ti 43.89 Cu 43.60 Zr 6.25 Ni 5.76 Si 0.5 and Ti 43.89 Cu 43.60 Zr 6.75 Ni 4.76 Si 1. The amorphous structure of all the samples was confirmed by X-ray diffraction (XRD) method. The thermal stability associated with glass transition, supercooled liquid region and crystallization was investigated by differential scanning calorimetry (DSC). Possible mechanisms for the improvement of GFA were discussed.

Improving plasticity and toughness of Cu-Zr-Y-Al bulk metallic glasses via compositional tuning towards the CuZr

2010 ◽  
Vol 25 (2) ◽  
pp. 375-382 ◽  
Author(s):  
Yong Shen ◽  
Jian Xu
Keyword(s):  
Shear Modulus ◽  
Intermetallic Compounds ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Critical Diameter ◽  
Glass Forming Ability ◽  
Al Alloys ◽  
Simple Approach ◽  
Glass Forming ◽  
Tie Line

In this work, we propose a simple approach for designing plastic bulk metallic glasses (BMGs) by exploiting the ductility of intermetallic compounds involved in the BMG-forming system. Its validity was examined by investigating a series of quaternary Cu-Zr-Y-Al alloys along the composition tie-line between Cu42Zr44.4Y3.6Al10 (Y1) and the B2 CuZr phase, expressed as (Cu0.5Zr0.5)x(M)100-x (M = Zr0.15Y0.225Al0.625, 84≤x≤93). When tuning the composition towards the CuZr, the glass-forming ability of alloys is dramatically degraded, showing a reduction of critical diameter Dc for BMG formation from 16 mm at x = 84 (Y1) to 2 mm at x = 93. As the composition of BMGs shifts to the CuZr terminal, the shear modulus μ of the BMGs decreases, whereas the Poisson's ratio ν increases. With respect to the Y1 BMG, compressive plasticity and toughness of the Y2 BMG (x = 92, Dc = 4 mm) with a higher concentration of the CuZr are improved, which is consistent with its lower μ and higher ν values.

scholarly journals Selection of the Composition with High Glass Forming Ability in Zr-Cu-Ni-Al Bulk Metallic Glasses

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Yajuan Sun ◽  
Yumin Li ◽  
Hongjing Wang
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Critical Diameter ◽  
Glass Forming Ability ◽  
Crystalline Phases ◽  
Glass Forming ◽  
Selection Of

Three new Zr-Cu-Ni-Al bulk metallic glasses were developed through appropriate mixing of three binary eutectics Zr38.2Cu61.8, Zr51Al49, and Zr64Ni36. By suppressing solidification of competing crystalline phases, a new glass forming alloy Zr51Cu24.22Ni14.06Al10.72with the critical diameter of up to 10 mm is obtained.

Sign in / Sign up

Export Citation Format

Share Document