Coercive-force hysteresis of carbon steels during elastic cyclic tensile deformation

Захаров, В. А.; Ulyanov, A.N.; Горкунов, Э. С.; Velichko, V. V.

doi:10.1134/s1061830913050070

Cited by 4 publications

(3 citation statements)

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“…Under applied stresses the dislocations segments bend between the points of weak fixation. In the case, when the stress exceeds a defined value, the dislocation segment breaks away from the points of weak fixation [24]. As a result, due to the dislocation structure modification, movement of the domain walls becomes less effective and the MAE intensity signal and its parameters Int(U a ) decrease monotonically [10].…”

Section: Resultsmentioning

confidence: 99%

“…The integral of the MAE is almost insensitive to creep deformation in the range of strain between 0.85 and 9.3%. The decrease of both parameters may be explained on the basis of previous knowledge provided by other researchers [2,23,24]. The plastic deformation produces defects inside the martensite plates in the form of dislocation tangles that decrease significantly the mobility of 'non-180 • ' domain walls [2].…”

Section: Resultsmentioning

confidence: 99%

“…According to the Granato-Lucke theory, it is believed that the ends of the dislocations lines are fastened at points of strong and weak fixation. The points of strong fixation are the nodes of the dislocation network, whereas the points of weak fixation are impurity atoms [24]. Under applied stresses the dislocations segments bend between the points of weak fixation.…”

Section: Resultsmentioning

confidence: 99%

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Prediction of the Mechanical Properties of P91 Steel by Means of Magneto-acoustic Emission and Acoustic Birefringence

2017

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The paper describes an application of nondestructive volumetric magnetic and ultrasonic techniques for evaluation of the selected mechanical parameter variations of P91 steel having direct influence on its suitability for further use in critical components used in power plants. Two different types of deformation processes were carried out. First, a series of the P91 steel specimens was subjected to creep and second, one to plastic deformation in order to achieve the material with an increasing strain level up to 10%. Subsequently, non-destructive and destructive tests were performed. Magnetic methods based on measurements of magnetoacoustic emission and magnetic hysteresis loop changes as well as the ultrasonic method based on acoustic birefringence measurements, were applied. Finally, the static tensile tests were carried out in order to evaluate the mechanical parameters. It is shown that some relationships between the selected parameters coming from the non-destructive and destructive tests may be formulated.

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Section: Resultsmentioning

confidence: 99%