Evaluation of fatigue damage using a magnetic measurement technique

Lo, C. C. H.; Tang, Fei; Jiles, David; Biner, S.B.

doi:10.1109/20.800727

Cited by 13 publications

(17 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of fatigue-depending magnetic measurements of different steel materials of other authors support the observed results [14,16]. Compared to the influence of static mechanical stress, the influence of cyclic stress is low.…”

Section: Discussionsupporting

confidence: 77%

“…This behaviour is observable for all studied stress stages. The occurrence of fatigue hardening is typical for heattreated materials [14]. At the same time, the remanence polarisation is decreasing.…”

Section: Resultsmentioning

confidence: 82%

“…The behaviour of the magnetic properties can be separated into three stages which can also be found in the literature [14,16]: During the first percent of the fatigue life-time, the dislocation density increases which is indicated by an increase of coercivity, i.e. fatigue hardening occurs.…”

Section: Resultsmentioning

confidence: 99%

“…At this stage, the number of dislocations stays almost constant which results in the constant magnetic properties. The existing dislocations tend to move to the surface of the specimen [14].…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Influence of the mechanical fatigue progress on the magnetic properties of electrical steel sheets

Karthaus¹,

Steentjes²,

Gröbel³

et al. 2017

Archives of Electrical Engineering

View full text Add to dashboard Cite

Abstract:The purpose of this paper is to study the variation of the magnetic properties of non-oriented electrical steel sheets with the fatigue state during cyclic mechanical loading. The obtained results are central to the design of variable drives such as traction drives in electric vehicles in which varying mechanical loads, e.g. in the rotor core (centrifugal forces), alter the magnetic properties. Specimens of non-oriented electrical steel are subject to a cyclically varying mechanical tensile stress with different stress amplitudes and number of cycles. The specimens are characterised magnetically at different fatigue states for different magnetic flux densities and magnetising frequencies. The measurements show a variation in magnetic properties depending on the number of cycles and stress magnitude which can be explained by changes in the material structure due to a beginning mechanical fatigue process. The studied effect is critical for the estimation of the impact of mechanical material fatigue on the operational behaviour of electrical machines. Particularly in electrical machines with a higher speed where the rotor is stressed by high centrifugal forces, material fatigue occurs and can lead to deterioration of the rotor's stack lamination.

show abstract

Section: Discussionsupporting

confidence: 77%

Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the mechanical fatigue progress on the magnetic properties of electrical steel sheets

Karthaus¹,

Steentjes²,

Gröbel³

et al. 2017

Archives of Electrical Engineering

View full text Add to dashboard Cite

show abstract

“…Therefore, attempts are being made by researchers to develop the Non-Destructive Evaluation (NDE) of such microstructural changes for the safety of components. Since magnetic properties of ferromagnetic alloys are very sensitive to microstructural modifications and the stress state, the popularity of magnetic techniques is growing for the NDE of deformations by creep, fatigue, thermal ageing, and irradiation [10][11][12][13][14]. In our earlier paper we found a good correlation between changes in magnetic properties, particularly with Cr contents of 15% and 20% with thermal ageing at 475 o C [15].…”

Section: Introductionmentioning

confidence: 76%

Evaluation of Embrittlement in Isochronal Aged Fe-Cr Alloys by Magnetic Hysteresis Loop Technique

Mohapatra¹,

Kamada²,

Kikuchi³

et al. 2011

Journal of Magnetics

View full text Add to dashboard Cite

Fe-Cr alloys with different Cr contents were prepared by an arc melting technique. The alloys were isochronally aged in the range from 400 o C to 900 o C with 50 o C steps with a holding time of 100 hours. The ageing produced embrittlement in the alloys due to either the formation of a Cr-rich α' phase or a σ phase at high temperatures. Magnetic Hysteresis Loop (MHL) and Micro-Vickers hardness were measured at each step to correlate the magnetic and mechanical properties. Coercivity and hardness of the alloys were increased and remanence decreased up to 500-550 o C due to formation of a Cr-rich α' phase. Beyond 500-550 o C range, the coercivity and hardness decreased and remanence increased due to the coarsening or dissolution of the Cr-rich α' phase. In the Fe-48% Cr alloy, formation of the σ phase at 700 o C reduced the maximum induction of the alloy significantly.

show abstract

Magnetic Nondestructive Investigation of Ferromagnetic Alloys Subjected to Stress and Fatigue

Melikhov¹,

Lo²,

Jiles³

2004

AIP Conference Proceedings

View full text Add to dashboard Cite

High depth nondestructive stress measurements on thick steel alloysABSTRACT. The influence of stress and fatigue under various stress amplitudes on the magnetic properties of a range of magnetic alloys (Ni, Fe 55 Ni 45 , Fe 64 Ni 36 and Fe 54 Ni 29 Co 17 ) was studied. Barkhausen effect signal and symmetrical minor hysteresis loops were measured at various stages during the tensile and fatigue tests. The data were analyzed using the Preisach model formalism in order to identify parameters which better described the structural changes in the materials. The results obtained from this work has enhanced the applicability of magnetic measurements for non-destructive testing of materials.

show abstract

Evaluation of fatigue damage using a magnetic measurement technique

Cited by 13 publications

References 4 publications

Influence of the mechanical fatigue progress on the magnetic properties of electrical steel sheets

Influence of the mechanical fatigue progress on the magnetic properties of electrical steel sheets

Evaluation of Embrittlement in Isochronal Aged Fe-Cr Alloys by Magnetic Hysteresis Loop Technique

Magnetic Nondestructive Investigation of Ferromagnetic Alloys Subjected to Stress and Fatigue

Contact Info

Product

Resources

About