Effect of Annealing on the Structure and Properties of Technically Pure Titanium after Torsion Deformation in a Bridgeman Chamber

ABSTRACTTi-N films were deposited by reactive ion plating on various substrates. The N/Ti-ratio was systematically varied in order to produce films of varying structure and properties from pure titanium to overstoichiometric TiN. Broad diffraction peaks typical of PVD Ti-N films were found. Metastable ct-titanium was observed over a wide range up to about 50 at. % N. No marked differences in the phase composition or in the crystallographic texture could be found in the films deposited on the various substrates. The hardness of the films was observed to increase with increasing nitrogen content, reaching a maximum around 35 – 40 at. % N corresponding to a mixed ε-Ti2N and δ-TiN structure. Extended annealing at 773 K did not result in any major phase transformations. After annealing at 1173 K, α-Ti could no longer be found in nitrogen-rich films. Also ε-Ti2 N transformed to δ-TiN after annealing at 1173 K for 2 h.

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Influences of pre-torsion deformation on microstructure and mechanical properties of pure titanium subjected to subsequent tension deformation

Chinese Journal of Aeronautics ◽

10.1016/j.cja.2017.10.009 ◽

2018 ◽

Vol 31 (4) ◽

pp. 837-844 ◽

Cited By ~ 5

Author(s):

Jie LIU ◽

Fuguo LI ◽

Han CHEN

Keyword(s):

Mechanical Properties ◽

Pure Titanium ◽

Microstructure And Mechanical Properties ◽

Torsion Deformation

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Structure and properties of hydrostatically extruded commercially pure titanium

Materials Science and Engineering A ◽

10.1016/j.msea.2010.05.043 ◽

2010 ◽

Vol 527 (21-22) ◽

pp. 5596-5603 ◽

Cited By ~ 21

Author(s):

S. Zherebtsov ◽

W. Lojkowski ◽

A. Mazur ◽

G. Salishchev

Keyword(s):

Pure Titanium ◽

Commercially Pure Titanium ◽

Structure And Properties ◽

Commercially Pure

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Structure and properties of commercially pure titanium nitrided in the plasma of a low-pressure gas discharge produced by a PINK plasma generator

Journal of Physics Conference Series ◽

10.1088/1742-6596/652/1/012013 ◽

2015 ◽

Vol 652 ◽

pp. 012013 ◽

Cited By ~ 1

Author(s):

Yu F Ivanov ◽

Yu H Akhmadeev ◽

I V Lopatin ◽

E A Petrikova ◽

V Krysina ◽

...

Keyword(s):

Pure Titanium ◽

Plasma Generator ◽

Low Pressure ◽

Gas Discharge ◽

Commercially Pure Titanium ◽

Structure And Properties ◽

Commercially Pure

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Structure and properties of diffusion bonded transition joints between commercially pure titanium and type 304 stainless steel using a nickel interlayer

Journal of Materials Science ◽

10.1007/s10853-007-1705-8 ◽

2007 ◽

Vol 42 (18) ◽

pp. 7906-7912 ◽

Cited By ~ 14

Author(s):

Sukumar Kundu ◽

Subrata Chatterjee

Keyword(s):

Stainless Steel ◽

Pure Titanium ◽

304 Stainless Steel ◽

Commercially Pure Titanium ◽

Structure And Properties ◽

Commercially Pure ◽

Type 304 ◽

Type 304 Stainless Steel

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Evolution of Microstructure and Mechanical Properties of Titanium Grade 4 with the Increase of the ECAP-Conform Passes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.667-669.1165 ◽

2010 ◽

Vol 667-669 ◽

pp. 1165-1170 ◽

Cited By ~ 7

Author(s):

Alexander V. Polyakov ◽

Dmitriy Gunderov ◽

Georgy I. Raab

Keyword(s):

Pure Titanium ◽

Commercially Pure Titanium ◽

Structure And Properties ◽

Deformation Bands ◽

Angular Pressing ◽

Commercially Pure ◽

Ultrafine Grained ◽

Titanium Grade ◽

Titanium Structure ◽

Evolution Of Microstructure

This work reports on the results of investigation of microstructure change of commercially pure titanium Grade 4 with the increase of the number of ECAP-Conform passes. There has been investigated influence of continuous equal-channel angular pressing by the scheme “Conform” (ECAP-C) on the structure and properties of commercially pure titanium Grade 4. It has been demonstrated that as a result of first two ECAP-C cycles titanium structure is strongly fragmented and deformation bands are formed. With the further increase of ECAP-C passes to 6 the band structure is transformed into ultrafine-grained (UFG) structure with the grain size of about 250 nm. The strength of titanium regularly grows with the increase of the number of ECAP-C passes, while ductility, which settles after first cycle on the level of 12%, is almost not changed with the further strain degree increase. As a result of the subsequent drawing of titanium after ECAP-C its strength additionally increases to 1300 MPa, with retention of ductility about 11%.

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