Structural characterization of ultrafine-grained interstitial-free steel prepared by severe plastic deformation

Interstitial-free steel sheets have been processed using a novel severe plastic deformation technique - continuous frictional angular extrusion (CFAE), in order to produce ultrafine grained structures. The deformation was carried out at room temperature and individual sheet specimens were repeatedly processed to various passes. An overall grain size of 200nm was achieved after 8 passes (or an equivalent total strain of 5.3). The present paper reports the evolution of microstructures during deformation, which were examined and characterized using electron backscatter imaging and high resolution EBSD in a field emission gun SEM. The mechanisms of grain refinement are discussed.

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Microstructure and Texture Evolution in Interstitial-Free (IF) Steel Processed by Multi-Axial Forging

Materials Science Forum ◽

10.4028/www.scientific.net/msf.702-703.774 ◽

2011 ◽

Vol 702-703 ◽

pp. 774-777 ◽

Cited By ~ 5

Author(s):

Ayan Bhowmik ◽

Somjeet Biswas ◽

Satyaveer Singh Dhinwal ◽

Apu Sarkar ◽

Ranjit Kumar Ray ◽

...

Keyword(s):

Plastic Deformation ◽

Yield Strength ◽

Severe Plastic Deformation ◽

Texture Evolution ◽

Fold Increase ◽

Interstitial Free ◽

If Steel ◽

Considerable Heterogeneity ◽

Interstitial Free Steel ◽

First Time

In this study, severe plastic deformation (SPD) of Ti-bearing interstitial-free steel was carried out by multi-axial forging (MAF) technique. The grain refinement achieved was comparable to that by other SPD techniques. A considerable heterogeneity was observed in the microstructure and texture. Texture of multi-axially forged steels has been evaluated and reported for the first time. The material exhibited a six-fold increase in the yield strength after four cycles of MAF.

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Microstructure and corrosion behaviour of ultrafine-grained pure magnesium by severe plastic deformation as a biodegradable material

Journal of Physics Conference Series ◽

10.1088/1742-6596/1825/1/012086 ◽

2021 ◽

Vol 1825 (1) ◽

pp. 012086

Author(s):

M Rifai ◽

A D Prasetya ◽

Mujamilah ◽

H Miyamoto

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Corrosion Behaviour ◽

Pure Magnesium ◽

Biodegradable Material ◽

Ultrafine Grained

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An Assessment of Bulk and Local Stored Energy Measurements in Ultrafine Grained Interstitial Free Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.89-91.244 ◽

2010 ◽

Vol 89-91 ◽

pp. 244-249 ◽

Cited By ~ 1

Author(s):

Sujoy S. Hazra ◽

Azdiar A. Gazder ◽

Elena V. Pereloma

Keyword(s):

Profile Analysis ◽

Energy Estimates ◽

Internal Stresses ◽

Line Profile Analysis ◽

Interstitial Free ◽

Stored Energy ◽

Scanning Calorimetry ◽

Angular Pressing ◽

Ultrafine Grained ◽

Interstitial Free Steel

The evolution of stored energy and associated thermal behaviour was investigated for an ultrafine grained Ti-IF steel severely deformed by Equal Channel Angular Pressing (ECAP) followed by cold rolling at ambient and liquid nitrogen temperatures. Bulk stored energy measurements by Differential Scanning Calorimetry (DSC) returned 350-600 whereas local stored energy estimates from microhardness, Electron Back-Scattering Diffraction (EBSD) and X-ray line profile analysis resulted in 5-140 . Higher bulk stored energy values correspond to the enthalpy release from all sources of strain in the material volume as well as Ti precipitation during annealing while the lower local stored energy range alludes only to dislocation content or internal stresses. An apparent activation energy of 500-550 suggests sluggish recrystallisation due to excess of Ti in solid solution.

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The New SPD Processing Trends to Fabricate Bulk Nanostructured Materials

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.114.7 ◽

2006 ◽

Vol 114 ◽

pp. 7-18 ◽

Cited By ~ 3

Author(s):

Ruslan Valiev

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Grain Refinement ◽

Nanostructured Materials ◽

Nanocrystalline Materials ◽

Commercial Production ◽

Materials Processing ◽

Ultrafine Grained ◽

Ultrafine Grained Materials ◽

Bulk Nanocrystalline

During the last decade severe plastic deformation (SPD) has become a widely known method of materials processing used for fabrication of ultrafine-grained materials with attractive properties. Nowadays SPD processing is rapidly developing and is on the verge of a transition from lab-scale research to commercial production. This paper focuses on several new trends in the development of SPD techniques for effective grain refinement, including those for commercial alloys and presents new SPD processing routes to produce bulk nanocrystalline materials.

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