Some aspects of plastic deformation theory with an account for thermally activated dislocation transformations

1976 ◽  
Vol 38 (2) ◽  
pp. 653-662 ◽  
Author(s):  
B. A. Greenberg ◽  
M. A. Ivanov ◽  
Yu. N. Gornostirev ◽  
L. E. Karkina
Keyword(s):  
Plastic Deformation ◽  
Deformation Theory ◽  
Thermally Activated

Effect of Plastic Deformation on the Isothermal FCC/HCP Phase Transformation during Aging of Co-27Cr-5Mo-0.05C Alloy

2007 ◽  
Vol 560 ◽  
pp. 23-28
Author(s):  
A. Mani-Medrano ◽  
Armando Salinas-Rodríguez
Keyword(s):  
Plastic Deformation ◽  
Martensitic Transformation ◽  
Tensile Deformation ◽  
Internal Stresses ◽  
X Ray Diffraction ◽  
Thermally Activated ◽  
Prior Plastic Deformation ◽  
Last Stage ◽  
Isothermal Martensitic Transformation

The effects of tensile deformation on the amount of hcp phase formed during a 3 hour isothermal aging at 800 °C is studied using in-situ X-ray diffraction and scanning electron microscopy. It is shown that the start of the isothermal martensitic transformation during aging of this material is delayed by prior plastic deformation. Nevertheless, the total amount of hcp phase present in the microstructure at the beginning of aging increases at a continuously decreasing rate due to stress-assisted transformation. This behavior is attributed to the relieving of internal stresses produced by plastic deformation prior to aging. Finally, during the last stage of aging, the amount of hcp phase in the microstructure increases as a result of isothermal martensitic transformation. It is suggested that the presence of mechanically-induced hcp phase during aging inhibits the thermally activated nucleation process that leads to the isothermal martensitic transformation.

Thermally activated mechanisms of plastic deformation of single crystals of the disordered alloy Ni3Fe

1978 ◽  
Vol 21 (7) ◽  
pp. 929-932
Author(s):  
V. V. Starenchenko ◽  
V. S. Kobytev ◽  
�. V. Kozlov ◽  
L. E. Popov
Keyword(s):  
Plastic Deformation ◽  
Single Crystals ◽  
Thermally Activated ◽  
Alloy Ni3fe ◽  
Mechanisms Of Plastic Deformation ◽  
Disordered Alloy

Determination of some parameters of the thermally activated plastic deformation of iron

1973 ◽  
Vol 5 (9) ◽  
pp. 1031-1036
Author(s):  
A. Ya. Krasovskii ◽  
V. A. Stepanenko
Keyword(s):  
Plastic Deformation ◽  
Thermally Activated

Severe Plastic Deformation of Amorphous Alloys

2008 ◽  
Vol 584-586 ◽  
pp. 227-230 ◽  
Author(s):  
Alex M. Glezer ◽  
Sergey V. Dobatkin ◽  
Margarita R. Plotnikova ◽  
Anna V. Shalimova
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Amorphous Alloy ◽  
Severe Plastic Deformation ◽  
Physical Properties ◽  
Plastic Flow ◽  
Low Temperatures ◽  
Amorphous Alloys ◽  
Thermally Activated ◽  
Different Temperatures

The structure and mechanical properties of amorphous alloy Ni44Fe29Co15Si2B10 after severe plastic deformation (SPD) in Bridgman chamber at the different temperatures (77 and 298 K) have been studied. It is shown that the early stages of the SPD of amorphous alloy cause a noticeable decrease in microhardness HV and significant changes in the physical properties. With increasing the value of SPD the transition from inhomogeneous to homogeneous (or to qualitatively different) mode of plastic flow is observed, which is accompanied by the effects of homogeneous nanocrystallization. The nanoparticle size does not exceed 10 nm. It is established that the thermally activated nanocrystallization processes can occur at very low temperatures (77 K).

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