Continuous Amorphization of Zr-Based Alloys by Controlled Mechanical Intermixing

1998 ◽  
Vol 554 ◽  
Author(s):  
G. Wilde ◽  
H. Sieber ◽  
J. H. Perepezko
Keyword(s):  
Grain Size ◽  
Solid State ◽  
Critical Value ◽  
Glass Forming Ability ◽  
Al Alloys ◽  
Al Alloy ◽  
Mechanical Working ◽  
Glass Forming ◽  
Ni Alloys ◽  
State Amorphization

AbstractBinary Zr-(Cu, Ni, Al) alloys were mechanically intermixed by cold-rolling stacks of elemental foils. The results indicate that solid-state amorphization is initiated if the grain size of the Zr-Cu and Zr-Ni alloys falls below a critical value. Amorphization was not observed for the Zr-Al alloy. These results are in accordance to the predictions of a model for solid-state amorphization. The comparison with the results on a quaternary Zr-Cu-Ni-Al alloy indicate the influence of multicomponent alloying on the glass-forming ability of Zr-rich alloys by mechanical working.

Glass forming ability criteria for La–Al–(Cu,Ni) alloys

2006 ◽  
Vol 352 (52-54) ◽  
pp. 5482-5486 ◽  
Author(s):  
Y. Zhang ◽  
Y. Li ◽  
H. Tan ◽  
G.L. Chen ◽  
H.A. Davies
Keyword(s):  
Glass Forming Ability ◽  
Glass Forming ◽  
Ni Alloys

Effect of Ga substitution on the crystallization behaviour and glass forming ability of Zr–Al–Cu–Ni alloys

2010 ◽  
Vol 527 (3) ◽  
pp. 469-473 ◽  
Author(s):  
Devinder Singh ◽  
T.P. Yadav ◽  
R.K. Mandal ◽  
R.S. Tiwari ◽  
O.N. Srivastava
Keyword(s):  
Glass Forming Ability ◽  
Crystallization Behaviour ◽  
Glass Forming ◽  
Ni Alloys ◽  
Ga Substitution

Glass-forming ability of Pr–(Cu,Ni)–Al alloys in eutectic system

2003 ◽  
Vol 18 (3) ◽  
pp. 664-671 ◽  
Author(s):  
Y. Zhang ◽  
H. Tan ◽  
H. Z. Kong ◽  
B. Yao ◽  
Y. Li
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Eutectic Composition ◽  
Solidus Temperature ◽  
Eutectic Point ◽  
Glass Forming Ability ◽  
Al Alloys ◽  
Eutectic System ◽  
Glass Forming

A eutectic point in Pr-rich Pr-(Cu,Ni)-Al alloys was experimentally determined by measuring the solidus temperature (Tm) and liquidus temperature (T1). It was found that Pr68(Cu0.5Ni0.5)25Al7 (at.%) is at the eutectic composition in the pseudoternary Pr–(Cu0.5Ni0.5)–Al alloys. The alloy Pr68(Cu0.5Ni0.5)25Al7 exhibits better glass-forming ability (GFA) than the ternary eutectic alloy Pr68Cu25Al7. However, the best GFA was obtained at an off-eutectic composition (Pr54[Cu0.5Ni0.5]30Al16) in the Pr–(Cu0.5Ni0.5)–Al alloys, which can be formed in fully amorphous rods with diameter of 1.5 mm by copper mold casting. Moreover, the glass-transition temperature Tg increases quickly (from 367 to 522 K) with the increasing of the Al content (from 3 to 27 at.%). The deviation of the best GFA composition from the eutectic point [Pr68(Cu0.5Ni0.5)25Al7] was explained in terms of the asymmetric coupled eutectic zone, the competition between growth of crystalline phase and formation of amorphous, and the higher glass-transition temperature Tg on the hypereutectic side.

Estimation of Crystalline Size of Deformed 5251 Al Alloy Using PALT and XRD Techniques

2013 ◽  
Vol 337-338 ◽  
pp. 11-18
Author(s):  
M. Abdel-Rahman ◽  
Ahmed G. Attallah ◽  
M. El-Sayed ◽  
A.A. Ibrahim ◽  
A.A. Akel ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
Al Alloys ◽  
Radioactive Isotopes ◽  
Crystalline Size ◽  
Al Alloy ◽  
Solid Materials ◽  
Deformation Effect ◽  
Powerful Technique ◽  
Xrd Techniques

Certain radioactive isotopes decay by emitting positrons, and the positrons can be used to probe the structure of solid materials. For example, one can investigate the grain size due to deformation in a metal. XRD is also a powerful technique for detection the defects introduced into a metal and for investigating the microstructure of a deformed metal. In this paper we shall investigate the plastic deformation effect on the grain size of 5251 Al alloys using two different techniques, PALT and XRD. The study shows a significant effect of the plastic deformation on the grain size which decreases as the deformation increases.

Effect of Al on the Glass Forming Ability of Zr-Ni-Cu-Al Alloys

2002 ◽  
Vol 93 (3) ◽  
pp. 223-227 ◽  
Author(s):  
Huan-Rong Wang ◽  
Yi-Fu Ye ◽  
Guang-Hui Min ◽  
Jun-Yan Zhang ◽  
Xin-Ying Teng ◽  
...  
Keyword(s):  
Glass Forming Ability ◽  
Al Alloys ◽  
Glass Forming

Investigation of the effects of Al on the glass forming ability of Zr-Cu-Ni-Al alloys through their solidification characteristics

2019 ◽  
Vol 109 ◽  
pp. 105-109 ◽  
Author(s):  
P. Li ◽  
J.J. Wang ◽  
J.L. Cheng ◽  
F. Li ◽  
W. Zhao ◽  
...  
Keyword(s):  
Glass Forming Ability ◽  
Al Alloys ◽  
Glass Forming
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