Influence of plastic deformation on thermal stability of low carbon bainitic steel

Evolution of structure of high-purity and commercially pure copper at severe plastic deformation (SPD) by high pressure torsion (HPT) at room temperature and in liquid nitrogen has been studied by transmission electron microscopy (TEM) and measurements of microhardness. Thermal stability of structure obtained by HPT has been investigated. Factors preventing from obtaining nanocrystalline structure in Cu are analyzed and possible ways of their overcoming are discussed.

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On the thermal stability of the cobalt nanostructure formed under severe plastic deformation

Physics of the Solid State ◽

10.1134/s1063783413120251 ◽

2013 ◽

Vol 55 (12) ◽

pp. 2608-2612

Author(s):

Kh. Ya. Mulyukov ◽

Ya. A. Abzgil’din ◽

I. Z. Sharipov ◽

R. R. Mulyukov ◽

V. A. Popov

Keyword(s):

Thermal Stability ◽

Plastic Deformation ◽

Severe Plastic Deformation ◽

Thermal Stability Of

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Mechanical properties, microstructure and thermal stability of a nanocrystalline CoCrFeMnNi high-entropy alloy after severe plastic deformation

Acta Materialia ◽

10.1016/j.actamat.2015.06.025 ◽

2015 ◽

Vol 96 ◽

pp. 258-268 ◽

Cited By ~ 471

Author(s):

B. Schuh ◽

F. Mendez-Martin ◽

B. Völker ◽

E.P. George ◽

H. Clemens ◽

...

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Plastic Deformation ◽

Severe Plastic Deformation ◽

High Entropy Alloy ◽

High Entropy ◽

Thermal Stability Of

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Annealing Response of Al-0.22Sc-0.13Zr Alloy Processed by Accumulative Roll Bonding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.584-586.899 ◽

2008 ◽

Vol 584-586 ◽

pp. 899-904 ◽

Cited By ~ 1

Author(s):

Petr Homola ◽

Margarita Slámová ◽

Vladivoj Očenášek ◽

J. Uhlíř ◽

Miroslav Cieslar

Keyword(s):

Thermal Stability ◽

Plastic Deformation ◽

Accumulative Roll Bonding ◽

Superplastic Forming ◽

Aged Specimen ◽

Roll Bonding ◽

Fine Grained ◽

Peak Aged ◽

Pre Treatment ◽

Thermal Stability Of

Ultra-fine grained (UFG) materials can be produced by several techniques involving severe plastic deformation (SPD). Accumulative Roll Bonding (ARB) is one of the SPD methods that enable the production of large amounts of UFG sheets. UFG sheets were prepared by up to six cycles of ARB at ambient temperature from an Al-0.22Sc-0.13Zr alloy in two states: a non-agehardened and a peak-aged. The effect of Al3(Sc1-xZrx) precipitates on the thermal stability of the UFG structures produced by ARB was investigated by isochronal annealing at temperatures between 200 and 550 °C. Additionally, the non-age-hardened ARB material was peak-aged prior to annealing and annealed together with both as-ARB-processed materials. The changes of microstructure and hardness due to annealing were studied. Annealing at 300 °C induces an additional strengthening in both non-pre-aged ARB materials that may be ascribed to precipitation and growth of coherent Al3(Sc1-xZrx) particles. This result suggests that the hardness decrease introduced by ARB in the peak-aged specimen is due to dissolution of precipitates during deformation. The annealing response of the materials above 300 °C does not depend on their thermal pre-treatment. However, the finely dispersed Al3(Sc1-xZrx) precipitates stabilise the refined deformed microstructure suitable for superplastic forming up to relatively high temperatures.

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