Features of surface layer structure of VT23 titanium alloy under bombardment with copper ions

2015 ◽  
Author(s):  
Mark P. Kalashnikov ◽  
Marina V. Fedorischeva ◽  
Victor P. Sergeev ◽  
Vasilii V. Neyfeld ◽  
Natalya A. Popova
Keyword(s):  
Titanium Alloy ◽  
Surface Layer ◽  
Copper Ions ◽  
Layer Structure ◽  
Vt23 Titanium Alloy

Increasing the titanium alloys durability due to modifications by vibro-abrasive processing of the strengthened surface layer

2021 ◽  
pp. 301-308
Author(s):  
V.V. Altukhova ◽  
R.F. Krupsky ◽  
A.A. Krivenok ◽  
O.G. Shakirova
Keyword(s):  
Titanium Alloy ◽  
Surface Layer ◽  
Nitric Acid ◽  
Titanium Alloys ◽  
Surface Hardening ◽  
World Science ◽  
Impact Surface ◽  
Current State ◽  
State Of Research ◽  
Defective Surface

It is shown that vibroabrasive treatment of hardened titanium alloy specimens contributes to an increase in their durability. This effect is explained by the removal of a defective surface layer containing microcracks and subject to the influence of residual tensile stresses. It is shown that the proposed stage of vibro-abrasive processing with ceramic granules makes it possible to almost completely remove iron introduced after vibro-impact surface hardening, which makes it possible to exclude the operation of etching in nitric acid from the technological process. The current state of research on durability in world science is briefly presented.

The Structure and Mechanical Properties of VT23 Welded Joints with Surface Layer Modified by Ultrasonic Mechanical Forging

2017 ◽  
Vol 743 ◽  
pp. 264-268 ◽  
Author(s):  
Anastasia Smirnova ◽  
Yury Pochivalov ◽  
Victor Panin ◽  
Anatoly Orishich ◽  
Aleksandr Malikov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Fatigue Life ◽  
Welded Joints ◽  
Experimental Tests ◽  
Relaxation Property ◽  
Surface Layers ◽  
Β Phase ◽  
Fatigue Life Test ◽  
Vt23 Titanium Alloy

The structure and mechanical properties of welded joints of VT23 titanium alloy received by method of laser welding after modifying the surface layers by ultrasonic mechanical forging (Treatment 1 and Treatment 2) were investigated. The experimental tests have revealed that the Treatment 2 provides a multiple increase in the relaxation property in fatigue life test. The formation of nonuniform distribution of vanadium, chromium and molybdenum in the welded joint increases the strength and, at the same time, the brittleness of β-phase. Mechanical treatment of the surface layers in the second mode provides a multiple increase in ductility up to 13%, in the as-received condition up to 9.9%. In consequence of plastic deformation, the β-phase intensity reduces twice with Treatment 2 which is related to its clustering. As follows from a presented data, the fatigue life of the VT23 titanium alloy has increased more than threefold.

Effect of Shock and Vibration Loading on the Fracture Mechanisms of a VT23 Titanium Alloy

2020 ◽  
Vol 52 (2) ◽  
pp. 252-261
Author(s):  
P. O. Maruschak ◽  
M. G. Chausov ◽  
I. V. Konovalenko ◽  
O. P. Yasnii ◽  
S. V. Panin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fracture Mechanisms ◽  
Vibration Loading ◽  
Vt23 Titanium Alloy

The investigation of disturbed surface layer structure by the external photoeffect under X-ray diffraction conditions

1982 ◽  
Vol 71 (2) ◽  
pp. 603-610 ◽  
Author(s):  
V. G. Kohn ◽  
M. V. Kovalchuk ◽  
E. M. Imamov ◽  
B. G. Zakharov ◽  
E. F. Lobanovioh
Keyword(s):  
Surface Layer ◽  
Layer Structure ◽  
X Ray Diffraction ◽  
X Ray

Modification of Tribolayers of a Titanium Alloy Sliding against a Steel

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Y. Zhou ◽  
W. Jiang ◽  
W. Chen ◽  
X. L. Ji ◽  
Y. X. Jin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Layer Structure ◽  
Frictional Coefficient ◽  
Tribological Performance ◽  
Wear Loss ◽  
Multilayer Graphene ◽  
Double Layer Structure ◽  
Sustainable Protection ◽  
Wear Transition ◽  
Sliding Distance

The nonprotective tribolayers of the titanium alloy were modified into additives-containing tribolayers through an artificial addition of multilayer graphene (MLG), Fe2O3 nanomaterials, or their mixtures with various proportions on the titanium alloy/steel sliding interface. The sustainability of the modified tribolayers under a high load was evaluated by the critical sliding distance for a mild-to-severe wear transition. The modified tribolayers were found to significantly improve or deteriorate tribological performance of the titanium alloy, which was decided by their ingredients. The pure MLG- or Fe2O3-containing tribolayers, because of their lacking load-bearing or lubricant capacity, presented poor sustainability and readily lost protection to cause high wear loss or frictional coefficient. However, for the addition of various mixtures of MLG and Fe2O3, the modified tribolayers possessed a double-layer structure consisting of friction-reducing MLG- and wear-resistant Fe2O3-predominated layers. They presented a sustainable protection, thus remarkably improving the tribological performance of the titanium alloy.

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

2015 ◽  
Vol 1085 ◽  
pp. 284-288 ◽  
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.

Change in Ceramic Object Surface Layer Structure During Operation. Part 1

2020 ◽  
Vol 61 (1) ◽  
pp. 94-99 ◽  
Author(s):  
V. V. Kuzin ◽  
S. N. Grigor’ev ◽  
M. A. Volosova
Keyword(s):  
Surface Layer ◽  
Layer Structure ◽  
Object Surface
Sign in / Sign up

Export Citation Format

Share Document