Titanium №3 2014

 

MARINE TITANIUM ALLOYS: CREATION, MASTERING, PERSPECTIVES

 

I. Gorynin, A. Oryshchenko, V. Leonov, A. Kudryavtsev, Y. Chudakov

 

The main stage of creation of titanium alloys for marine technique, technology of melting ingots, technology of making casting and deformable semi-products, and advanced investigation CRISM “Prometey” for home ship-building are examination in the article.

 

Keywords: titanium alloys, technologies, deformable semi-products, marine technique.

 

EXTENSION OF SERVICE LIFE OF SEAGOING VEHICLES STRUCTURES MADE OF TITANIUM ALLOYS

 

A. Oryshchenko, V. Leonov, V. Mikhailov, I. Sakharov

 

The operation of marine structures shows a great number of cases where the specified lifetime is not so long as their operating life, especially for hull structures. This fact brings up an issue of the service life extension of the above structures.

The paper reports the results of examination and inspection for likely defects of the most heavily loaded submersible hull assembly units by nondestructive testing methods. The hull is made of Ti-Al-V alloy and was in operation for 20 years. Besides, the paper gives the results of crack formation on a porthole coaming.

The results of investigations make it possible to extend the specified lifetime of submersible titanium hull after its long-term operation.

 

 

Keywords: hull, titanium alloy, service life, microstructure, crevices.

 

 

TITANIUM ALLOYS USED IN NUCLEAR POWER ENGINEERING

 

A. Oryshchenko, V. Leonov, I. Schastlivaya, T. Igolkina

 

The analysis of titanium structural materials for the equipment of operating and future high- and low-power nuclear power plants (NPP) has been performed. The work gives the characterization of used titanium semi-finished products and reviews the experience of their use in different NPP systems.

 

Keywords: titanium structural materials, nuclear power engineering nuclear power engineering.

 

STRUCTURE OF LARGE SIZE PLATES OF TITANIUM PSEUDO-α-ALLOYS

 

A. Oryshchenko, A. Kudriavtsev, A. Khachaturian, S. Petrov, N. Zlobina, A. Ptashnic

 

In given article results of researches of a structure of the large-sized forged-rolled plates made of ingots in weight to 17 tons are present.

 

Keywords: titanium alloys, plates, macrostructure, microstructure, diffraction electron backscattering diffraction method (EBSD), crystallographic orientations.

 

INVESTIGATIONS OF PHASE COMPOSITION, STRUCTURE AND MECHANICAL PROPERTIES OF TITANIUM PSEUDO-β-ALLOYS

A. Kudryavtsev, V. Kulik, N. Tretyakova, Y. Chudakov, A. Shalaev, M. Konovalov

 

Results of phase composition, structure and mechanical properties of the titanium pseudo-β-alloy VST 5553 forging are presented. Features of intergranular structure metal formation, connected with different character of β-phase dissolution depending on the parameters of strengthening thermal treatment and its influence on the mechanical properties of the metal are investigated.

 

Keywords: titanium alloys, strengthening thermal treatment, phase composition, structure, mechanical properties.

 

COMPUTER MODELLING OF REAL STRUCTURE OF TITANIUM ALLOYS AT RESEARCH OF DEFORMATION AND DESTRUCTION PROCESSES. PART 1

 

A. Musienko, V. Leonov, I. Kozlova, D. Panotskiy

 

By means of the finite-element method (FEM) and a phenomenological crystal plasticity theory a series of calculations was realized for model and real elements of two-phase titanium alloys. Comparison of computation results end pre-existing mesurements of local strain nonheterogeneities was performed. Calculated fields of strains and stresses are presented as well as the comparison of various micro-structures on the basis of deformation energy.

 

Keywords: titanium alloys, computational crystal plasticity.

 

COMPUTER MODELING OF REAL STRUCTURE OF TITANIUM ALLOYS AT RESEARCH OF DEFORMATION AND DESTRUCTION PROCESSES.PART 2. RESULTS AND CONCLUSIONS

 

A. Musienko, V. Leonov, I. Kozlova, D. Panotskiy

 

By means of the finite-element method (FEM) and phenomenological crystal plasticity theory a series of calculations was realized for model and real elements of two-phase titanium alloys. Calculated fields of strains and stresses for the real structures are presented in part 2 as well as the comparison of various micro-structures on the basis of deformation energy.

 

Keywords: titanium alloys, computational crystal plasticity.

 

NEW HIGH-STRENGTH WROUGHT TITANIUM ALLOY FOR LARGE BLADES OF NEW GENERATION TURBINE INSTALLATIONS

 

A. Oryshchenko, V. Leonov, I. Schastlivaya, T. Igolkina, I. Puzakov, N. Tarenkova

 

Principles of an integrated approach to the problem of creating new high-strength wrought titanium alloy for large blades of new generation turbine installations were considered. The results of examination of samples made of new alloy pilot forgings are presented in this paper.

 

Keywords: high-strength titanium alloy, large-sized rotor blades, structure, mechanical properties.

 

TITANIUM ALLOYS USED FOR THREADED FIXTURES IN SHIP MECHANICAL ENGINEERING

 

V. Leonov, B. Ushakov, A. Kochergin, K. Кhromushkin

 

This article is devoted to problems which may appear in using of titanium alloys in threaded fixtures. On the basis of the carried out investigations it is shown that in order to solve the problem of reliable operation of threaded fixtures made of titanium alloys it is necessary to create favorable contact conditions for fixture couples in tightening. Results of experimental investigations concerning application of different kinds of industrial and experimental lubricants аrе presented in this article along with comparative data on advantages and deficiencies of these lubricants.

 

Keywords: titanium alloys, threaded joints, grease, surface hardening.

 

DEVELOPMENT AND COMMERCIALIZATION OF COLD-WORKED TITANIUM ALLOY TUBES AT JSC «CHEPETSKY MECHANICAL PLANT»

 

V. Leonov, V. Kopylov, L. Rtishcheva, M. Shtutsa, V. Smirnov, Yu. Karpov

 

In order to fill orders for shipbuilding and to provide nuclear power engineering equipment with high-quality titanium tubes their production should be brought to a commercial level at the Russian plants.

Federal State Unitary Enterprise Central Research Institute of Structural Materials (FSUE CRISM) «Prometey» has analyzed the state of domestic enterprises capable of producing titanium alloy tubes. Performance evaluation criteria for the plants included the equipment available, the level of technical and technological support, skilled staff and experience in organizing the production of high-quality cold-worked tubes.

Relying on the analysis of the above criteria, they selected an enterprise meeting the requirements specified for the relevant activities, namely, JSC «Chepetsky Mechanical Plant (ChMP)», Glazov, included in JSC «TVEL» (Fuel Company of Rosatom).

They developed a unique process of producing titanium ingots, hot-pressed titanium billets and high-quality titanium tubes with using a copper coating as a «sublubricating» layer for nuclear power engineering and shipbuilding at JSC «ChMP». Normative documents for tube making have been developed and agreed.

The results of testing cold-worked spiral ribbed tubes and small-sized tubes in FSUE CRISM «Prometey» have been presented.

Relying on the results of investigations, FSUE CRISM «Prometey» confirmed the readiness of JSC «ChMP» for the commercial production of high-quality titanium alloy tubes to be used in nuclear power engineering and shipbuilding.

 

Keywords: titanium alloys, cold-worked tubes, hot-pressed billets, copper coating, spiral ribbed tubes, commercial production.

 

EXPERIENCE OF MANUFACTURING LARGE SIZE SHEET HOT STAMPINGS OF TITANIUM PSEUDO- a ALLOYS

 

A. Kydriavtsev, A. Khachaturian, V. Sorokin, A. Bereslavsky, T. Privalova, Yu. Gorbunova, A. Kuznetsov

 

In given article results of works on a reconstruction and development on new manufacture of manufacturing techniques large size sheet stamped intermediates (preparations) and results of formation of structure and mechanical properties hot stampings of titanium pseudo - a alloys.

 

Keywords: titanium alloys, sheet, large size sheet stamping, macrostructure, microstructure, mechanical properties.

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