Modeling plastic deformation effect on magnetization in ferromagnetic materials

2012 ◽  
Vol 111 (6) ◽  
pp. 063909 ◽  
Author(s):  
Jianwei Li ◽  
Minqiang Xu ◽  
Jiancheng Leng ◽  
Mingxiu Xu
2017 ◽  
Vol 66 (10) ◽  
pp. 107501
Author(s):  
Liu Qing-You ◽  
Luo Xu ◽  
Zhu Hai-Yan ◽  
Han Yi-Wei ◽  
Liu Jian-Xun

2013 ◽  
Vol 337-338 ◽  
pp. 11-18
Author(s):  
M. Abdel-Rahman ◽  
Ahmed G. Attallah ◽  
M. El-Sayed ◽  
A.A. Ibrahim ◽  
A.A. Akel ◽  
...  

Certain radioactive isotopes decay by emitting positrons, and the positrons can be used to probe the structure of solid materials. For example, one can investigate the grain size due to deformation in a metal. XRD is also a powerful technique for detection the defects introduced into a metal and for investigating the microstructure of a deformed metal. In this paper we shall investigate the plastic deformation effect on the grain size of 5251 Al alloys using two different techniques, PALT and XRD. The study shows a significant effect of the plastic deformation on the grain size which decreases as the deformation increases.


1968 ◽  
Vol 26 (2) ◽  
pp. K151-K154 ◽  
Author(s):  
I. Y. Dekhtyar ◽  
E. G. Madatova ◽  
P. S. Nisin ◽  
R. G. Fedchenko

Magnetoacoustic emission (MAE) and Barkhausen emission (BE) have been studied in ferromagnetic materials placed in a magnetic field, varying at a few millihertz. Comparison of the two signals indicates the nature of the domain walls responsible for the activity at a given field strength. In order to characterize a specimen the strength of the emission around the hysteresis loop is measured. The technique has been used to measure non-destructively the effects of the following. ( a ) Precipitates: both MAE and BE are sensitive to the growth of precipitates in Incoloy 904, and can be used to monitor the precipitate size. ( b ) Dislocations: BE and MAE exhibit high sensitivity to plastic deformation, and this has been studied in a-Fe. ( c ) Radiation: neutron irradiation of an Fe-Cu alloy produces small changes in emission, although with sufficient sensitivity for useful characterization of radiation effects. ( d ) Tensile stress: MAE is sensitive to stress over the whole range, but particularly at low stresses. Such measurements lay the foundation for the use of MAE for residual-stress measurements.


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