scholarly journals Mössbauer Analysis of Deformation–Induced Acceleration of Short-Range Concentration Separation in Fe-Cr Alloys—Effect of the Substitution Impurity: Sb and Au

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 725
Author(s):  
Valery Shabashov ◽  
Kirill Kozlov ◽  
Yurii Ustyugov ◽  
Andrey Zamatovskii ◽  
Timofey Tolmachev ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Mössbauer Spectroscopy ◽  
Severe Plastic Deformation ◽  
Positron Annihilation ◽  
Temperature Region ◽  
Short Range ◽  
Mossbauer Spectroscopy ◽  
Short Range Ordering ◽  
Mössbauer Analysis ◽  
Effect Of Doping

The effect of doping the ferrite alloy Fe-16Cr by the oversized impurities Sb and Au on the mechanism of the short-range ordering induced by “warm” severe plastic deformation was studied using the method of Mössbauer spectroscopy. A comparison between the results obtained and the positron annihilation data on the evolution of the defects of vacancy type stabilized by the impurities Sb and Au was performed. It has been established that the impurities Sb and Au entail a shift of the temperature region of short-range ordering realization in conditions of applying pressure torsion towards greater temperatures by 250 and 100 K, respectively.

The Comparative Mössbauer Analysis of Superfine Structure of Hadfield Steel upon Different Kinds of Severe Deformation

2011 ◽  
Vol 319-320 ◽  
pp. 13-23 ◽  
Author(s):  
V.A. Shabashov ◽  
A.E. Zamatovsky ◽  
L.G. Korshunov ◽  
A.V. Litvinov
Keyword(s):  
Plastic Deformation ◽  
Short Range ◽  
Room Temperature ◽  
Precipitation Hardening ◽  
Effective Field ◽  
Hadfield Steel ◽  
Magnetic Characteristics ◽  
Short Range Ordering ◽  
Superfine Structure ◽  
Mössbauer Analysis

Severe plastic deformation (friction, compression shear, filing or rolling) of Hadfield steel leads to the growth of the internal effective field on 57Fe cores, removal of the magnetic degeneracy in spectra, and the extension of the paraprocess up to room temperature. The observed change of the magnetic characteristics is explained by the deformation-induced redistribution of carbon and short-range ordering of carbon and manganese. Since the magnetic degeneracy is removed in the Hadfield steel upon deformation, it is possible to consider a mechanism of magnetic precipitation hardening, which is realized in local magnetically ordered regions of the structure containing Mn-C pairs.

Mössbauer Spectroscopy Studies of Grain Boundaries in Nanostructured Metals

2008 ◽  
Vol 273-276 ◽  
pp. 506-513 ◽  
Author(s):  
Vladimir V. Popov
Keyword(s):  
Mass Transfer ◽  
Plastic Deformation ◽  
Mössbauer Spectroscopy ◽  
Severe Plastic Deformation ◽  
Grain Boundaries ◽  
Mossbauer Spectroscopy ◽  
Nanocrystalline Metals ◽  
Nanostructured Metals ◽  
Mößbauer Spectroscopy ◽  
Spectroscopy Studies

The results of NGR studies of grain boundaries in nanocrystalline metals are briefly reviewed and analyzed together with the data of ordinary diffusion experiments. Grain boundaries in materials obtained both by powder technologies and severe plastic deformation (SPD) are considered. Possible factors causing accelerated mass transfer in every case are analyzed with the account taken of specific features of the structure of these materials.

scholarly journals Investigation of Defects and Atomic Ordering in Fe72Al28 by Positron Annihilation and Mössbauer Spectroscopy

1995 ◽  
Vol 05 (C1) ◽  
pp. C1-157-C1-161 ◽  
Author(s):  
Y. Jiraskova ◽  
O. Schneeweiss ◽  
M. Sob ◽  
I. Novotny ◽  
I. Prochazka ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Positron Annihilation ◽  
Mossbauer Spectroscopy ◽  
Atomic Ordering ◽  
Mößbauer Spectroscopy
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