Microstructural Change of Beta Type Titanium Alloy by Intense Plastic Deformation

Goroh Itoh; Hisashi Hasegawa; Tsing Zhou; Yoshinobu Motohashi; Mitsuo Niinomi

doi:10.4028/www.scientific.net/MSF.503-504.705

Paper Titles

Effect of Rolling Direction on the Microstructure and Mechanical Properties of Accumulative Roll Bonding (ARB) Processed Commercially Pure 1050 Aluminum Alloy
p.681

Controlling Mechanism of Ferrite Grain Size Generated through Large Strain Deformation of 0.15C Steel
p.687

Effects of the Number of ECAP Passes and ECAP Route on the Heterogeneity in Mechanical Properties across the Sample from Titanium VT1-0
p.693

Consolidation of Amorphous Al₈₆Ni₆Co₂Gd₆ Melt-Spun Ribbons by Twist Extrusion
p.699

Microstructural Change of Beta Type Titanium Alloy by Intense Plastic Deformation
p.705

Microstructure, Texture and Property Changes of High Purity Aluminium during Accumulative Roll Bonding and Conventional Rolling
p.711

Severe Plastic Deformation of Commercially Pure Titanium by Rotary-Die Equal Channel Angular Pressing Method
p.717

Fine-Grained Structure Formation in Al- Mg- Sc Alloy during Hot ECAP
p.721

ECC Observations of Nanostructures Formed by Sliding Wear in Copper
p.727

HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Microstructural Change of Beta Type Titanium Alloy...

Microstructural Change of Beta Type Titanium Alloy by Intense Plastic Deformation

Abstract:

Usual static recrystallization treatment and a method to provide intense plastic deformation, ARB namely Accumulative Roll-Bonding, have been applied to two beta type titanium alloys, i.e. Ti-29Nb-13Ta-4.6Zr and Ti-15V-3Cr-3Sn-3Al. Microstructural change as well as work-hardening behavior was examined as a function of plastic strain. Both the work-hardening rate and the hardness at the initial as-hot-rolled state were smaller in the Ti-Nb-Ta-Zr alloy than in the Ti-V-Cr-Sn-Al alloy. Recrystallized grains of 14μm in size were obtained by the usual static recrystallization treatment, which was significantly smaller than that of the starting as-hot-rolled plate of 38μm. No significant change other than flattening and elongating of the original grains was found in the optical microscopic scale. It was revealed, however, from a TEM observation combined with selected area diffraction technique that geometric dynamic recrystallization occurred in the Ti-Nb-Ta-Zr alloy deformed at room temperature by a true strain of 5, resulting in an ultra-fine-grained microstructure where the grain size was roughly estimated to be about 100nm.

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Periodical:

Materials Science Forum (Volumes 503-504)

Pages:

705-710

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.705

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Online since:

January 2006

Authors:

Goroh Itoh, Hisashi Hasegawa, Tsing Zhou, Yoshinobu Motohashi, Mitsuo Niinomi

Keywords:

Accumulative Roll Bonding (ARB), Beta Type Titanium Alloy, Grain Size, Intense Plastic Deformation, Microstructure, Recrystallization, Ti-15V-3Cr-3Sn-3Al, Ti-29Nb-13Ta-4.6Zr, Work-Hardening

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References

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