Stress Dependence of Switching Field during the Devitrification of Finemet-Based Magnetic Microwires

2013 ◽  
Vol 543 ◽  
pp. 495-498 ◽  
Author(s):  
J. Olivera ◽  
Rastislav Varga ◽  
J. Anaya ◽  
Arkadi Zhukov
Keyword(s):  
Stress State ◽  
Thermal Treatment ◽  
Internal Stresses ◽  
Thermal Treatments ◽  
Stress Dependence ◽  
Switching Field ◽  
Microstructural Characteristics ◽  
Adequate Treatment ◽  
Magnetostriction Constant ◽  
Non Destructive

We have studied the influence of the thermal treatment on the stress dependence of the switching field during the devitrification of amorphous Fe73.5Cu1Nb3Si11.5B11 microwires. The non-destructive test (NDT) method based on the magnetization reversal of ferromagnetic materials is sensible to changes in microstructural characteristics and the stress state of the material. The stress dependence has been explained considering the magnetoelastic contribution to the switching mechanism which is modified applying the tensile stresses and changing the magnetostriction constant and strength of the internal stresses distribution through thermal treatments. We show that by properly setting a frequency during the measurement and adequate treatment of the sample, it is possible to vary the sensitivity, magnitude and stress dependence of the sample. Keywords: Magnetic bistability, glass-coated microwires, switching field, stress sensor

Physical properties of nearly zero magnetostriction Co-rich glass-coated amorphous microwires

1999 ◽  
Vol 14 (9) ◽  
pp. 3775-3783 ◽  
Author(s):  
A. F. Cobeño ◽  
A. Zhukov ◽  
A. R. de Arellano-López ◽  
F. Elías ◽  
J. M. Blanco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hysteresis Loop ◽  
Hysteresis Loops ◽  
External Stress ◽  
Stress Dependence ◽  
Switching Field ◽  
Flat Shape ◽  
Magnetostriction Constant ◽  
Different Dimensions ◽  
Amorphous Microwires

Magnetic and mechanical properties of Co-rich amorphous microwires of nominal compositions (Co1–xMnx)75Si10 B15 (0.08 < x < 0.11) and Co56.5Fe6.5Ni10B16Si11 with nearly zero magnetostriction constant have been studied. Drastic changes of the hysteresis loop with the decrease of x from rectangular to flat shape were observed at x < 0.1, while the Co56.5Fe6.5Ni10B16Si11 microwire showed rectangular hysteresis loops. Compositions with x ≥ 0.1 have small but positive magnetostriction constant while negative λs values have been observed at x ≤ 4 0.09, indicating rectangular character of the hysteresis loop in samples with nearly zero and even for small negative λs. External stress dependence of switching field, H*, showed an increase of H*; with s for samples with x = 0.11 and a decrease of H* with σ for x = 0.1. Besides, microwires of the same composition but with different dimensions showed different H*(σ) dependencies.

scholarly journals A multilevel investigation supported by multivariate analysis for tomato product formulation

2021 ◽  
Author(s):  
Fatma Boukid ◽  
Elena Curti ◽  
Agoura Diantom ◽  
Eleonora Carini ◽  
Elena Vittadini
Keyword(s):  
Thermal Treatment ◽  
Color Change ◽  
Water Molecules ◽  
Thermal Treatments ◽  
Industrial Processing ◽  
H Nmr ◽  
Mobile Populations ◽  
Product Formulation ◽  
Tomato Product ◽  
The Impact

AbstractIndustrial processing of tomato includes its cutting and mincing, thermal treatments, and the addition of ingredients, which might induce changes in physicochemical properties of the final products. In this frame, the impact of texturing/thickening [xanthan gum (X) or potato fiber (F)] on the macroscopic, mesoscopic and molecular properties of tomato double concentrate (TDC) was investigated to determine if F can efficiently substitute X, in association with small solutes (sugar and salt) and thermal treatment (cold and hot). At a macroscopic level, multivariate statistics (MANOVA) underlined that color change (ΔE) was increased by X and F addition contrary to heating and the addition of salt and sugar. MANOVA revealed that texture was greatly enhanced through the use of F over X. 1H NMR molecular mobility changes were more controlled by texturing agents (F and X) than thermal treatment and small solutes. Particularly F increased the more rigid population indicating stronger interaction with water molecules resulting in shear-thinning flow. However, adding X contributed into the increase of the dynamic and mobile populations. Therefore, F can be a valid “clean label” substitute of X in modulating tomato products properties.

THEORY OF NON-DESTRUCTIVE INSPECTION OF CERAMICS BASED ON FLAW-SIZE DISTRIBUTION

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1489-1495
Author(s):  
YOHTARO MATSUO
Keyword(s):  
Stress State ◽  
Size Distribution ◽  
Flaw Size ◽  
Sufficient Condition ◽  
Necessary And Sufficient Condition ◽  
Surface Strengthening ◽  
One To One ◽  
Necessary And Sufficient ◽  
Non Destructive ◽  
Machining Damage

Two kinds of theory for non-destructive inspection of ceramics were reviewed, which were derived by the authors using flaw-size distribution. In the sufficient condition theory (Realistic NDI), we had discussed about the screening flaw-size and a screening region. In the necessary and sufficient condition theory (Ideal NDI), we found that the screening flaw-size should be changed depending on stress state and specimen configuration. It was proved that there is one-to-one correspondence between Ideal NDI and a proof test. Applications to machining damage problems and surface strengthening of ceramics were also presented.

Influence of thermal treatments on the internal stresses of metallic glasses

1998 ◽  
Vol 235-237 ◽  
pp. 793-795 ◽  
Author(s):  
M. Tejedor ◽  
J.A. Garcı́a ◽  
J. Carrizo ◽  
L. Elbaile
Keyword(s):  
Metallic Glasses ◽  
Internal Stresses ◽  
Thermal Treatments

scholarly journals Application of the Mathar Method to Identify Internal Stress Variation in Steel as a Welding Process Result

2017 ◽  
Vol 25 (2) ◽  
pp. 125-136
Author(s):  
Dariusz Kowalski
Keyword(s):  
Internal Stress ◽  
Welding Process ◽  
Internal Stresses ◽  
Induced Voltage ◽  
Stress Variation ◽  
Steel Members ◽  
Electric Arc Welding ◽  
Destructive Measurement ◽  
Non Destructive ◽  
Excessive Stress

Abstract The paper deals with the method to identify internal stresses in two-dimensional steel members. Steel members were investigated in the delivery stage and after assembly, by means of electric-arc welding. In order to perform the member assessment two methods to identify the stress variation were applied. The first is a non-destructive measurement method employing local external magnetic field and to detecting the induced voltage, including Barkhausen noise The analysis of the latter allows to assess internal stresses in a surface layer of the material. The second method, essential in the paper, is a semi-trepanation Mathar method of tensometric strain variation measurement in the course of a controlled void-making in the material. Variation of internal stress distribution in the material led to the choice of welding technology to join. The assembly process altered the actual stresses and made up new stresses, triggering post-welding stresses as a response for the excessive stress variation.

scholarly journals Non-destructive Assessment of the Axial Stress State in Iron and Steel Truss Structures by Dynamic Measurements

2017 ◽  
Vol 199 ◽  
pp. 3380-3385 ◽  
Author(s):  
Hoa T.M. Luong ◽  
Volkmar Zabel ◽  
Werner Lorenz ◽  
Rolf G. Rohrmann
Keyword(s):  
Stress State ◽  
Axial Stress ◽  
Truss Structures ◽  
Dynamic Measurements ◽  
Iron And Steel ◽  
Steel Truss ◽  
Non Destructive

scholarly journals Impact of Crystalline Orientation on the Switching Field in Barium Titanate Using Piezoresponse Force Spectroscopy

2014 ◽  
Vol 1652 ◽  
Author(s):  
Nikhil K. Ponon ◽  
Daniel J. R. Appleby ◽  
Erhan Arac ◽  
Kelvin S. K. Kwa ◽  
Jonathan P. Goss ◽  
...  
Keyword(s):  
Electric Field ◽  
Phase Change ◽  
Crystal Orientation ◽  
Force Spectroscopy ◽  
Ferroelectric Domain ◽  
Switching Field ◽  
The Impact ◽  
Non Destructive ◽  
Domain Level

ABSTRACTUnderstanding crystal orientation at the ferroelectric domain level, using a non destructive technique, is crucial for the design and characterization of nano-scale devices. In this study, piezoresponse force spectroscopy (PFS) is used to identify ferroelectric domain orientation. The impact of crystal orientation on the switching field of ferroelectric BaTiO3 is also investigated at the domain level. The preferential domain orientations for BaTiO3 thin films prepared by pulsed laser deposition (PLD) in this study are [001], [101] and [111]. They have been mapped onto PFS spectra to show three corresponding switching fields of 460, 330 and 120 kV/cm respectively. In addition, the electric field at which the enhanced piezoresponse occurs was found to vary, due to a phase change. The polarization reversal occurs via a 2-step process (rotation and switching) for [101] and [111] orientations. The piezoresponse enhancement is absent for the [001] (pure switching) domains. The results demonstrate that an electric field induced phase change causes the [101] and [111] domains to reverse polarization at a lower field than the [001] domain.

Sign in / Sign up

Export Citation Format

Share Document