Magnetoresistance of Fe-Ni invar alloy and Cu trilayer

2020 ◽  
Author(s):  
Ananya Sahoo ◽  
Maheswari Mohanta ◽  
S. K. Parida ◽  
Mukul Gupta ◽  
V. R. Reddy ◽  
...  
Keyword(s):  
Invar Alloy

Evidence for high-spin-to-low-spin transition under pressure in Fe 72 Pt 28 Invar alloy

2000 ◽  
Vol 80 (2) ◽  
pp. 155-163 ◽  
Author(s):  
S. Odin, F. Baudelet, E. Dartyge, J. P
Keyword(s):  
High Spin ◽  
Spin Transition ◽  
Invar Alloy

Effect of 50-keV proton irradiation on the magnetism of a Fe66Ni34 Invar alloy

2013 ◽  
Vol 333 ◽  
pp. 13-17 ◽  
Author(s):  
M. Matsushita ◽  
Y. Matsushima ◽  
T. Uruga ◽  
R. Ishigami ◽  
A. Iwase
Keyword(s):  
Proton Irradiation ◽  
Invar Alloy

Gamma-Ray Radiation-Induced Surface Hydrophobic Effects in Invar Alloy

2012 ◽  
Vol 482-484 ◽  
pp. 1585-1591 ◽  
Author(s):  
Cheng Fu Yang ◽  
Wei Wen Wang ◽  
Hsin Hwa Chen ◽  
Wei Tan Sun ◽  
Chi Lin Shiau ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Structural Changes ◽  
Gamma Ray ◽  
Small Deviation ◽  
Contact Angles ◽  
Invar Alloy ◽  
Hydrophobic Effects ◽  
Post Irradiation ◽  
Radiation Induced ◽  
Gamma Ray Irradiation

In this paper, we report a new phenomenon observed in the gamma-ray radiation-induced hydrophobic effects on an Invar surface: When the Invar alloy is subjected to different doses of gamma-ray irradiation, the contact angle increases with the radiation dose. Invar samples with exposed to a higher dose appear more hydrophobic, but this tendency disappears following post-irradiation etching. The contact angles of the irradiated and etched Invar samples can be restored back to a stable value with small deviation after 30 min of annealing at 150°C. X-ray diffraction (XRD) analysis found no crystalline structural changes. High resolution field emission scanning microscope (FE-SEM) analyses showed that irradiation might induce crack-like surfaces which could be removed at higher radiation dose in the following acid etchings. It is believed that the chemical bonds of Invar oxide on the surface were broken by the gamma-ray irradiation, thus raising the likelihood of binding with free ions in the air and resulting in the exclusion of the hydrophilic OH bonds, leaving a hydrophobic post-irradiation Invar surface.

Noncollinear Spin Structure in Fe–Ni Invar Alloy Probed by Magnetic EXAFS at High Pressure

2011 ◽  
Vol 80 (2) ◽  
pp. 023709 ◽  
Author(s):  
Ken Matsumoto ◽  
Hiroshi Maruyama ◽  
Naoki Ishimatsu ◽  
Naomi Kawamura ◽  
Masaichiro Mizumaki ◽  
...  
Keyword(s):  
High Pressure ◽  
Spin Structure ◽  
Invar Alloy

scholarly journals Mechanism of Hot Cracking in Multi-pass Weld Metal of Fe-36%Ni Invar Alloy. Welding of Fe-36%Ni Invar Alloy. (I).

2001 ◽  
Vol 19 (4) ◽  
pp. 664-672 ◽  
Author(s):  
Hiroyuki HIRATA ◽  
Kazuhiro OGAWA ◽  
Susumu HONGOU ◽  
Hiroshi IWAHASHI ◽  
Taketo YAMAKAWA ◽  
...  
Keyword(s):  
Weld Metal ◽  
Hot Cracking ◽  
Invar Alloy

scholarly journals On thermal expansion behavior of invar alloy fabricated by modulated laser powder bed fusion

2018 ◽  
Vol 160 ◽  
pp. 895-905 ◽  
Author(s):  
Hamed Asgari ◽  
Mehrnaz Salarian ◽  
Henry Ma ◽  
Adeola Olubamiji ◽  
Mihaela Vlasea
Keyword(s):  
Thermal Expansion ◽  
Invar Alloy ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Thermal Expansion Behavior ◽  
Expansion Behavior

Parameter optimisation of laser cladding repair for an Invar alloy mould

2018 ◽  
Vol 233 (8) ◽  
pp. 1859-1871 ◽  
Author(s):  
Shichao Zhu ◽  
Wenliang Chen ◽  
Xiaohong Zhan ◽  
Liping Ding ◽  
Junjie Zhou
Keyword(s):  
Dilution Rate ◽  
Laser Cladding ◽  
Laser Power ◽  
Scanning Speed ◽  
Advanced Technology ◽  
Invar Alloy ◽  
Geometric Features ◽  
Feeding Rates ◽  
Cladding Layer ◽  
Powder Feeding

Laser cladding repair is an advanced technology for repairing Invar alloy moulds; however, the influences of various processing parameters on the quality of the Invar alloy moulds have yet to be determined. To explore the optimisation of laser cladding repair parameters, analyses of the geometric features and microstructure of the cladding layer were conducted. First, the influences of different powder feeding rates and scanning speeds on the dilution rate of the substrate were investigated by establishing a mathematical model of the laser power attenuation. Next, the influences of the parameters on the geometric features of the cladding layer were analysed. Finally, the influences of the parameters on the microstructure of the cladding layer were evaluated. At a laser power of 2300 W, a scanning speed of 3 m/min, and a powder feeding rate of 9 g/min, the best results of the width, height, dilution rate, roughness, and contact angle of the cladding layer were obtained. The results of this study indicated that excellent metallurgical bonding occurred between the cladding layer and the interface layer, and that the intended geometric features and desired microstructure of the cladding layer were obtained.

Contribution of T2 Term to the Magnetization of a 35.4 at% Ni–Fe Invar Alloy

1980 ◽  
Vol 48 (4) ◽  
pp. 1105-1110 ◽  
Author(s):  
Ikuo Nakai ◽  
Fumihisa Ono ◽  
Osamu Yamada
Keyword(s):  
Invar Alloy

Fine-Grained Structures Associated with Deformation Twin and Its Influence on Tensile Behaviours in a Cold-Rolled Fe-Ni Alloy

2006 ◽  
Vol 503-504 ◽  
pp. 895-900 ◽  
Author(s):  
Tatsuya Morikawa ◽  
Taku Moronaga ◽  
Kenji Higashida
Keyword(s):  
Deformation Twin ◽  
Liquid Nitrogen Temperature ◽  
Invar Alloy ◽  
High Yield ◽  
Fine Grained ◽  
Transmission Electron ◽  
Ni Alloy ◽  
Cold Rolled ◽  
Crystallographic Planes

Fine-grained structures in Fe-36mass%Ni Invar alloy have been investigated by using transmission electron microscopy (TEM). Particular attention has been paid on the role of deformation twinning in the formation of fine-grained structures and its influence on tensile stressstrain behaviours of rolled specimens. In Fe-Ni Invar alloy with a moderate stacking fault energy, deformation twin did not appear in usual cold-rolling at room temperature (RT), where a kind of cell walls was formed and the Cu-type texture was observed. On the other hand, twinning was occurred by rolling when specimens were cooled to liquid nitrogen temperature (LNT) immediately before the rolling. In such case, a fine lamellar structure was developed and the brass-type texture appeared. However, the lamella boundaries did not coincide with any crystallographic planes, and they were intersected with the bands of deformation twin. Specimens rolled by 90% in thickness reduction exhibited tensile stressstrain behaviours similar to those observed in specimens with SPD structures. In particular, specimens rolled at LNT showed high yield strengths and non-uniform deformation.

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