scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Effect of tensile deformation on micromagnetic parameters in 0.2% carbon steel and 2.25Cr–1Mo steel

23 Apr 1999-Acta Materialia (Newcastle University)-Vol. 47, Iss: 6, pp 1869-1878
TL;DR: In this paper, the influence of prior tensile deformation on the magnetic Barkhausen emission (MBE) and the hysteresis curve has been studied in 0.2% carbon steel and 2.25Cr-1Mo steel under different tempered conditions.
About: This article is published in Acta Materialia.The article was published on 1999-04-23. It has received 42 citations till now. The article focuses on the topics: Deformation (engineering) & Carbon steel.
Citations
More filters
Journal ArticleDOI
TL;DR: In this paper, the effect of residual stress changes caused by grinding on the magnetic Barkhausen emission (MBE) has been studied in case-carburised En36 steel.

69 citations

Journal ArticleDOI
TL;DR: In this article, an extended version of the first author's model (Yoshida, F., 2000) is proposed on the premise that the material behavior of sharp yield point and the subsequent abrupt yield drop result from a rapid dislocation multiplication and the stress-dependence of dislocation velocity.

67 citations

Journal ArticleDOI
TL;DR: In this article, the effect of near-surface and subsurface stresses on the magnetic Barkhausen emission (MBE) profile has been studied in case-carburised and tempered En36 steel.

55 citations

Journal ArticleDOI
TL;DR: In this paper, the magnetic properties of dual-phase steels were evaluated using eddy current and Barkhausen noise nondestructive testing methods and correlated with their microstructural changes.

49 citations

Journal ArticleDOI
TL;DR: Skewness of Magnetic Barkhausen Noise (MBN) signal is used as a new feature for applied stress determination in this article, which presents its ability for measuring applied tensile stress compared with conventional feature, meanwhile, a nonlinear behavior of this new feature and an independence of the excitation conditions under compressive stress are found and discussed.

48 citations

References
More filters
Book
01 Jun 1972
TL;DR: In this paper, the authors present materials at the practical rather than theoretical level, allowing for a physical, quantitative, measurement-based understanding of magnetism among readers, be they professional engineers or graduate-level students.
Abstract: Introduction to Magnetic Materials, 2nd Edition covers the basics of magnetic quantities, magnetic devices, and materials used in practice. While retaining much of the original, this revision now covers SQUID and alternating gradient magnetometers, magnetic force microscope, Kerr effect, amorphous alloys, rare-earth magnets, SI Units alongside cgs units, and other up-to-date topics. In addition, the authors have added an entirely new chapter on information materials. The text presents materials at the practical rather than theoretical level, allowing for a physical, quantitative, measurement-based understanding of magnetism among readers, be they professional engineers or graduate-level students.

6,573 citations

Journal ArticleDOI
TL;DR: In this article, the effect of microstructures on acoustic and magnetic Barkhausen signals has been investigated in a quenched and tempered steel and spheroidized steels with various carbon contents.

114 citations

Journal ArticleDOI
TL;DR: The magnetic properties of AISI 4130 steel after eight heat treatments have been investigated as discussed by the authors, and properties such as hysteresis loss, coercivity and initial permeability were found to be closely interrelated.
Abstract: The magnetic properties of AISI 4130 steel after eight heat treatments have been investigated. Properties such as hysteresis loss, coercivity, and initial permeability were found to be closely interrelated. Furthermore, they were each dependent on the hardness of the material. A relationship between the hardness and permeability was found which was microstructure independent. These parameters were also found to change in a systematic way with plastic deformation and this result can be used for non-destructive evaluation. Correlations between the magnetic parameters were also found to change in a systematic way with plastic deformation and this result can be used for non-destructive evaluation. Correlations between the magnetic parameters revealed relationships which depended on the microstructure of the material. The residual stress in steels can be determined from the changes in maximum differential permeability.

83 citations

Journal ArticleDOI
TL;DR: In this paper, a two-stage process of irreversible magnetic domain wall movement during magnetization is proposed considering the lath or grain boundaries and second-phase precipitates as the two major obstacles to domain-wall movement.
Abstract: Magnetic Barkhausen emission (MBE) has been used to characterize various microstructures in tempered 0.2 wt% C steel, 2.25Cr—1Mo steel and 9Cr—1Mo steel samples (where the composition is in approximate weight per cent). A two-stage process of irreversible magnetic domain wall movement during magnetization is proposed considering the lath or grain boundaries and second-phase precipitates as the two major obstacles to domain-wall movement. The domain walls overcome these two major obstacles over a range of critical field strengths with some mean values, characteristic of the obstacles. If these two mean values are close to each other, then a single peak, sometimes associated with slope changes, appears in the MBE behaviour. On the other hand, if the mean values are widely separated, then two-peak MBE behaviour appears to indicate the influence of these two major obstacles separately. Based on this, the influence of the dissolution of martensite and/or bainite and the precipitation and growth of the...

71 citations

Journal ArticleDOI
TL;DR: Magneto-acoustic emission (MAE) and Barkhausen emission (BE) have been measured from polycrystals of pure iron which were then heat-treated at successively higher temperatures as mentioned in this paper.
Abstract: Magneto-acoustic emission (MAE) and Barkhausen emission (BE) have been measured from polycrystals of pure iron which had been strained by 4.9%. The specimens were then heat-treated at successively higher temperatures. The heat treatments resulted in stress recovery and, at higher temperatures, a reduction in the dislocation density. BE activity and MAE activity profiles were measured after each anneal as a function of the magnetizing field, and the number of Barkhausen events was counted as a function of their peak amplitude. At low fields the intensity of the BE and MAE activities shows a strong trend as a function of the annealing temperature, which is in agreement with the temperature dependence of the dislocation density. At higher fields there are additional fluctuations in the BE and MAE activities as a function of the annealing temperature which occur at temperatures below those of dislocation recovery. These results show that both MAE and BE are sensitive to the dislocation density, and t...

64 citations