Effect of the structural and phase state on the deformation behavior and mechanical properties of the ultrafine-grained titanium alloy (Ti–Al–V–Мо) at temperatures in the range of 293–973 K

Investigations of mechanical properties of nanocrystalline (nc) materials are still in interest of materials science, because they offer wide application as structural materials thanks to their outstanding mechanical properties. NC materials demonstrate superior hardness and strength as compared with their coarse grained counterparts, but very often they possess a limited ductility or show low uniform elongation due to poor strain hardening ability. Here, we present the results of investigation of the microstructure and mechanical properties of nc Pd and Pd-x%Ag (x=20, 60) alloys. The initially coarse grained Pd-x% Ag samples were processed by high pressure torsion, which resulted in formation of homogenous ultrafine grain structure. The increase of Ag contents led to the decrease of the resulted grain size and change in deformation behavior, because of decreasing of stacking fault energy (SFE). The samples with larger Ag contents demonstrated the higher values of hardness, yield stress and ultimate stress. Remarkably the uniform elongation had also increased with increase of strength.

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Investigations on Microstructure Evolution and Deformation Behavior of Aged and Ultrafine Grained Al-Zn-Mg Alloy Subjected to Severe Plastic Deformation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.667-669.253 ◽

2010 ◽

Vol 667-669 ◽

pp. 253-258

Author(s):

Wei Ping Hu ◽

Si Yuan Zhang ◽

Xiao Yu He ◽

Zhen Yang Liu ◽

Rolf Berghammer ◽

...

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Plastic Deformation ◽

Grain Size ◽

Severe Plastic Deformation ◽

Microstructure Evolution ◽

Deformation Behavior ◽

Deformation Mechanisms ◽

Mg Alloy ◽

Ultrafine Grained

An aged Al-5Zn-1.6Mg alloy with fine η' precipitates was grain refined to ~100 nm grain size by severe plastic deformation (SPD). Microstructure evolution during SPD and mechanical behaviour after SPD of the alloy were characterized by electron microscopy and tensile, compression as well as nanoindentation tests. The influence of η' precipitates on microstructure and mechanical properties of ultrafine grained Al-Zn-Mg alloy is discussed with respect to their effect on dislocation configurations and deformation mechanisms during processing of the alloy.

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Effect of hydrogen on the formation of structure and mechanical properties of the ultrafine-grained titanium alloy of Ti–Al–V–Mo system

10.1063/1.5083344 ◽

2018 ◽

Author(s):

G. P. Grabovetskaya ◽

I. P. Mishin ◽

O. V. Zabudchenko ◽

E. N. Stepanova ◽

A. O. Khovanova

Keyword(s):

Mechanical Properties ◽

Titanium Alloy ◽

Ultrafine Grained

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Effect of mechanical-thermal treatment on structural-phase state and mechanical properties of near β titanium alloy

10.1063/1.5083442 ◽

2018 ◽

Cited By ~ 1

Author(s):

I. P. Mishin ◽

E. V. Naydenkin ◽

I. V. Ratochka ◽

O. N. Lykova ◽

V. A. Vinokurov

Keyword(s):

Mechanical Properties ◽

Titanium Alloy ◽

Thermal Treatment ◽

Phase State ◽

Structural Phase ◽

Structural Phase State

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Changing of the Structural-Phase State and Mechanical Properties of VT-23 Titanium Alloy under Surface Treatment by Intense Flux of Copper Ions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1085.284 ◽

2015 ◽

Vol 1085 ◽

pp. 284-288 ◽

Cited By ~ 1

Author(s):

Viktor Sergeev ◽

Mark P. Kalashnikov ◽

Vasilii V. Neufeld

Keyword(s):

Mechanical Properties ◽

Titanium Alloy ◽

Phase State ◽

Copper Ions ◽

Structural Phase ◽

Ion Current ◽

High Flux ◽

Structural Phase State ◽

Ion Treatment ◽

Ion Current Density

Results of surface modification of the VT-23 titanium alloy by high flux of copper ions with an energy of 2 keV and ion current density of 3.5 mA/cm2 was studied. The dependence of the microhardness and penetration depth of ion as function of duration of ion treatment was determined. Structural-phase state of ion-modified of the VT-23 titanium samples surface layer was investigated by TEM and SEM. Microhardness was researched by nanoindentation method.

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