Multistage martensitic transformations in nanocrystalline Ti-50.9 at% Ni alloy

2021 ◽  
Vol 64 (10) ◽  
pp. 124-130
Author(s):  
S.L. Girsova ◽  
◽  
et al.
Keyword(s):  
Martensitic Transformations ◽  
Ni Alloy

Effect of a magnetic field on the reverse and forward martensitic transformations in the Fe-33% Ni alloy

2009 ◽  
Vol 108 (2) ◽  
pp. 139-146 ◽  
Author(s):  
I. V. Zolotarevskii ◽  
S. V. Loskutov ◽  
V. K. Man’ko ◽  
S. V. Seidametov
Keyword(s):  
Magnetic Field ◽  
Martensitic Transformations ◽  
Ni Alloy

scholarly journals Physical and Structural Characterization of Monocrystalline Cu-13.7% Al-4.2% Ni Alloy Submitted to Thermo-Cyclical Treatments under Applied Loads

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 219
Author(s):  
Lioudmila A. Matlakhova ◽  
Elaine C. Pereira ◽  
Serguey A. Pulnev ◽  
Carlos Y. Shigue ◽  
Natalia A. Palii
Keyword(s):  
Martensitic Transformations ◽  
Nominal Composition ◽  
Special Device ◽  
X Ray Diffraction ◽  
Experimental Conditions ◽  
Optimum Load ◽  
Ni Alloy ◽  
Complex Structural ◽  
Martensite Reorientation

Monocrystalline alloy with a nominal composition of Cu-13.7% Al-4.2% Ni (wt.%) that shows reversible martensitic transformations (RMTs) was studied. The alloy, manufactured by the “Memory Crystals Group” in Russia, was subjected to thermo-cyclical treatment (TCT) under tension within a range that included critical RMT temperatures. A special device was developed to perform TCTs (up to 500 cycles) and three different loads were applied: 0.11, 0.26, and 0.53 MPa. X-ray diffraction analysis, optical microscopy, differential calorimetry, and Vickers microhardness were involved in the alloy’s characterization. Under TCTs, the alloy displayed complex structural transformation, revealing the sequence of RMT, β1 ↔ R ↔ β′1 + γ′1; the involved phases were coherently precipitated but very sensitive to the experimental conditions. It was found that during TCTs (from 300 cycles) performed under optimum load (0.26 MPa), the processes of martensite reorientation, hardening, and stabilization of the structure were the most intensive thus leading to a reduction of RMT critical intervals and increased microhardness.

Change of Microstructure and Analysis of Fracture of the Ti-50.8 at.% Ni Alloy in the Ultrafine-Grained State after Multiple Martensitic Transformations with a Large Number of Cycles

2021 ◽  
Vol 1016 ◽  
pp. 354-358
Author(s):  
Anna Churakova ◽  
Dmitriy Gunderov
Keyword(s):  
Martensitic Transformations ◽  
Tensile Tests ◽  
Fracture Pattern ◽  
Cycling Treatment ◽  
Thermal Cycling Treatment ◽  
Ultrafine Grained ◽  
Ni Alloy ◽  
Number Of Cycles ◽  
Average Size ◽  
Change Of Microstructure

The microstructure and mechanical properties of the ultrafine-grained Ti–50.8 at.% Ni alloy after thermal cycling treatment with the number of cycles up to 250 was investigated. A fractographic analysis of the samples after tensile tests was carried out. The fracture pattern of the alloy in the UFG state has a viscous character with microdepths on the fracture surface. The average size of microdepths decreases as the number of thermal cycles increases up to n= 250.

scholarly journals Isothermal Martensitic Transformations in an Aged Ni-Rich Ti–Ni Alloy Containing Coherent Ti3Ni4 Particles

2020 ◽  
Vol 61 (1) ◽  
pp. 37-41 ◽  
Author(s):  
Hiroshi Akamine ◽  
Yohei Soejima ◽  
Tadaaki Nakamura ◽  
Farjami Sahar ◽  
Takashi Fukuda ◽  
...  
Keyword(s):  
Martensitic Transformations ◽  
Ni Alloy

Martensitic transformations between martensites in a CuAlNi alloy

1975 ◽  
Vol 9 (5) ◽  
pp. 491-497 ◽  
Author(s):  
K. Otsuka ◽  
H. Sakamoto ◽  
K. Shimizu
Keyword(s):  
Martensitic Transformations ◽  
Ni Alloy

M�ssbauer study of martensitic transformations in an Fe-29.6% Ni alloy

1982 ◽  
Vol 17 (12) ◽  
pp. 3479-3483 ◽  
Author(s):  
I. Akg�n ◽  
A. Gedikoglu ◽  
T. N. Durlu
Keyword(s):  
Martensitic Transformations ◽  
Ni Alloy
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