Corrosion studies of single crystals of iron–gallium alloys in aqueous environments

ABSTRACTThis project investigates the magnetomechanical sensing behavior of iron-gallium alloys in response to applied bending loads to identify the relevant design criteria for novel magnetostrictive sensor applications. A series of experiments are conducted on the magnetic induction response of cantilevered beams to dynamic bending loads. Analytic models of the system are formulated from both the constitutive magnetostriction equations and a free energy derivation. Both the experimental and analytical results show a change of as much as 0.3 T of induction can be measured in the samples in response to relatively small applied forces, with the output magnetic signal appearing at twice the frequency of beam vibration.

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The Usage of Hydroextrusion for Plastic Deformation of Magnetostrictive Iron-Gallium Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.946.25 ◽

2019 ◽

Vol 946 ◽

pp. 25-30 ◽

Cited By ~ 2

Author(s):

I.V. Gervasyeva ◽

V.A. Milyutin ◽

D.I. Davidov ◽

Yulia V. Khlebnikova

Keyword(s):

Plastic Deformation ◽

Crystallographic Texture ◽

Point Of View ◽

Air Cooling ◽

Degree Of Deformation ◽

Gallium Alloys ◽

Gallium Content ◽

First Time ◽

Electron Back Scattered Diffraction ◽

Iron Gallium

For the first time hydroextrusion process was chosen for Fe-Ga ingots deformation with a gallium content of 19 and 20 at.%. The samples were annealed at 950oC, followed by air cooling. Structure of deformation and primary recrystallyzation were investigated by the method of electron back-scattered diffraction (EBSD). The degree of hydroextrusion deformation achieved was 28 – 42 %. There was not found any crystallographic texture at such degree of deformation. The value of magnetostriction in recrystallization sample was about 100 ppm. Available in literature methods and approaches to creation of the Fe-Ga samples from the point of view of receiving high magnetostriction and also a possibility of machining of the samples are discussed.

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An Assembly for Electrochemical Corrosion Studies in Aqueous Environments at High Temperature and Pressure

CORROSION ◽

10.5006/0010-9312-23.11.331 ◽

1967 ◽

Vol 23 (11) ◽

pp. 331-334 ◽

Cited By ~ 15

Author(s):

B. E. WILDE

Keyword(s):

Test Specimen ◽

Reference Electrode ◽

Electrochemical Corrosion ◽

High Temperature And Pressure ◽

Aisi Type ◽

Corrosion Studies ◽

External Reference ◽

Aqueous Environments ◽

Temperature And Pressure ◽

Type 304

Abstract An assembly is described, in which electrochemical corrosion measurements can be carried out in aqueous environments up to 314 C (598 F) and 105.5 kg/cm2. Test specimen mounting and corrosive environment containment procedures are discussed. A techniqie for using a high pressure electrolyte bridge with an external reference electrode is described. The performance of the system is demonstrated by potentiostatic anodic, cathodic and linear polarization experiments carried out on AISI Type 304 steel in dilute chloride solutions at 289 C.

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