The effects of high pressure and superheating on the planar growth of Al3Ni phase in hypo-peritectic Al-30wt%Ni alloy

2019 ◽  
Vol 772 ◽  
pp. 1052-1060 ◽  
Author(s):  
X.H. Wang ◽  
H.W. Wang ◽  
C.M. Zou ◽  
Z.J. Wei ◽  
Y. Uwatoko ◽  
...  
Keyword(s):  
High Pressure ◽  
Ni Alloy ◽  
Planar Growth ◽  
Al3ni Phase

The formation of bulk β-Al3Ni phase in eutectic Al-5.69wt%Ni alloy solidified under high pressure

2018 ◽  
Vol 742 ◽  
pp. 670-675 ◽  
Author(s):  
X.H. Wang ◽  
Z. Ran ◽  
Z.J. Wei ◽  
C.M. Zou ◽  
H.W. Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Ni Alloy ◽  
Al3ni Phase

scholarly journals Effect of High Pressure on the Solidification of Al–Ni Alloy

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 478
Author(s):  
Xiao-Hong Wang ◽  
Duo Dong ◽  
Xiao-Hong Yang
Keyword(s):  
Heat Capacity ◽  
High Pressure ◽  
Potential Energy ◽  
Ambient Pressure ◽  
Interface Temperature ◽  
Debye Temperatures ◽  
Ni Alloy ◽  
Low Temperature Specific Heat ◽  
Al3ni Phase ◽  
Dendrite Growth Model

The effect of high pressure on the microstructure of hypo-peritectic Al–38wt.%Ni alloy was studied. The results show that Al3Ni and Al3Ni2 phases coexist at ambient pressure. However, it becomes a typical hyper-eutectic microstructure when synthesized at 2 GPa and 4 GPa. Meanwhile, the interface temperature of Al3Ni and Al3Ni2 phases was calculated with the combination of the BCT dendrite growth model, which is suitable for the Al3Ni2 phase. According to the highest interface temperature principle, the result shows that the Al3Ni phase dominates over 1–5 GPa. Finally, the Debye temperature and potential energy of the hypo-peritectic Al–38wt.%Ni alloy under different pressures were researched. Based on the low temperature specific heat-capacity curve. The Debye temperatures at ambient pressure, 2 GPa, and 4 GPa are 504.4 K, 508.71 K and 515.36 K, respectively, and the potential energy in the lowest point decreases with the increase of pressure.

scholarly journals Study on the Phase Selection and Debye Temperature of Hyper-Peritectic Al-Ni Alloy under High Pressure

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 84
Author(s):  
Xiaohong Wang ◽  
Zhipeng Chen ◽  
Duo Dong ◽  
Dongdong Zhu ◽  
Hongwei Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Ambient Pressure ◽  
Competitive Growth ◽  
Phase Selection ◽  
Debye Temperatures ◽  
Ni Alloy ◽  
Temperature Heat ◽  
Low Temperature Heat Capacity ◽  
New Phase ◽  
Selection Of

The phase selection of hyper-peritectic Al-47wt.%Ni alloy solidified under different pressures was investigated. The results show that Al3Ni2 and Al3Ni phases coexist at ambient pressure, while another new phase α-Al exists simultaneously when solidified at high pressure. Based on the competitive growth theory of dendrite, a kinetic stabilization of metastable peritectic phases with respect to stable ones is predicted for different solidification pressures. It demonstrates that Al3Ni2 phase nucleates and grows directly from the undercooled liquid. Meanwhile, the Debye temperatures of Al-47wt.%Ni alloy that fabricated at different pressures were also calculated using the low temperature heat capacity curve.

Annealing behaviour of nanocrystalline NiTi (50 at% Ni) alloy produced by high-pressure torsion

2011 ◽  
Vol 91 (22) ◽  
pp. 3079-3092 ◽  
Author(s):  
R. Singh ◽  
H. Rösner ◽  
E.A. Prokofyev ◽  
R.Z. Valiev ◽  
S.V. Divinski ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Annealing Behaviour ◽  
Ni Alloy

Annealing Behavior of FeNi Alloy Processed by High-Pressure Torsion

2010 ◽  
Vol 667-669 ◽  
pp. 313-318 ◽  
Author(s):  
Seung Won Lee ◽  
Z. Horita
Keyword(s):  
High Pressure ◽  
Annealing Time ◽  
Vickers Microhardness ◽  
Rotation Speed ◽  
High Pressure Torsion ◽  
Equivalent Strain ◽  
Microstructure Analysis ◽  
Annealing Behavior ◽  
Ni Alloy ◽  
Feni Alloy

An Fe-50at %Ni alloy was processed by high-pressure torsion (HPT) and annealed at lower homologous temperatures. Vickers microhardness and microstructural evolutions were examined with respect to the annealing time. Disks with 10 mm diameters having 0.85 mm thicknesses were subjected to HPT under a pressure of 6 GPa for 1-10 revolutions at a rotation speed of 1 rpm. The annealing after the HPT processing was conducted at homologous temperatures of ~0.3 for up to 40 days. The hardness increases with straining and saturates to a constant level of ~400 Hv at large equivalent strain. Microstructure analysis using XRD revealed that there was a peak corresponding to an α (Fe, Ni) phase.

Characterization of a nanocrystalline Mg–Ni alloy processed by high-pressure torsion during hydrogenation and dehydrogenation

2016 ◽  
Vol 41 (23) ◽  
pp. 9803-9809 ◽  
Author(s):  
Marcell Gajdics ◽  
Marco Calizzi ◽  
Luca Pasquini ◽  
Erhard Schafler ◽  
Ádám Révész
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Ni Alloy

Heterogenity of Microstructure Evolution in NiTi (50 at% Ni) Alloy Severely Deformed by High Pressure Torsion

2011 ◽  
pp. 147-154 ◽  
Author(s):  
R. Singh ◽  
J. Fiebig ◽  
S. Ostendorp ◽  
H. Rösner ◽  
E.A. Prokofyev ◽  
...  
Keyword(s):  
High Pressure ◽  
Microstructure Evolution ◽  
High Pressure Torsion ◽  
Ni Alloy

Supersaturation in Ag–Ni alloy by two-step high-pressure torsion processing

2013 ◽  
Vol 94 (1) ◽  
pp. 9-17 ◽  
Author(s):  
A. Bachmaier ◽  
J. Keckes ◽  
K.S. Kormout ◽  
R. Pippan
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Ni Alloy
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