The Study of the Complex Mechanical Properties of Rolled Bars of VT6 Alloy as a Function of Chemical Composition and Structure Type

Yu. B. Egorova, I. M. Mamonov, L. V. Davydenko

Abstract


This paper presents the results of statistical tests carried out to identify the mechanical properties of ?16–150 mm VT6 titanium alloy bars as a function of their post-annealing chemical composition and structure. It is shown that the high variation of mechanical properties may be due to fluctuations in the grade composition and structure type. 50% to 60% of variations in strength properties are due to composition+structure co-effects.  To improve the stability of such properties, the paper identifies maximum permissible total fluctuations in the chemical composition in terms of aluminum/molybdenum equivalents of alloying elements and impurities. The research team has fitted the regression dependencies for evaluating the mean values of the mechanical properties of 16-60 mm VT6 bars as a function of the structure type and aluminum/molybdenum equivalents of the alloying elements and impurities.

Full Text:

PDF

References


Ilyin A.A., Kolachev B.A., Polkin I.S. Titanovye splavy. Sostav, struktura, svoystva: spravochnik [Titanium alloys. Composition, structure, properties: reference book], Moscow, VILS - MATI, 2009, 520 p. (in Russ.)

Alexandrov V.K., Anoshkin N.F., Belozerov A.P. et al. Polufabrikaty iz titanovykh splavov [Semi-finished products from titanium alloys], Moscow, VILS, 1996, 581 p. (in Russ.)

Borisova E.A. et al. Titanovye splavy. Metallografiya titanovykh splavov [Titanium alloys. Metallography of titanium alloys], Moscow, Metallurgy, 1980, 464 p. (in Russ.)

Boyer R., Welsch G., Collings E.W. Materials Properties Handbook. Titanium Alloys, OH, USA, ASM International, Materials Park, 1994, 1176 p.

Brun M.Ya. The quality of stampings from titanium alloys at VSMPO and the possibility of increasing it by improving production technology [Kachestvo shtampovok iz titanovykh splavov na VSMPO i vozmozhnosti ego povysheniya za schet sovershenstvovaniya tekhnologii proizvodstva], TLS, 1989, no. 5, pp. 25-30. (in Russ.)

Brun M.Ya., Shakhanova G.V. About the structure of titanium alloys and the parameters that determine its variety [O strukture titanovykh splavov i parametrakh, opredelyayushchikh ee mnogoobrazie], Tekhnologiya metallov [Technology of metals], 2009, no. 4, pp. 41-47. (in Russ.)

Shapovalova O.M., Markova I.A., Ivchenko T.I. Investigation of the stability of the mechanical properties of semi-finished products from two-phase titanium alloys [Issledovanie stabil'nosti mekhanicheskikh svoystv polufabrikatov iz dvukhfaznykh titanovykh splavov], Vestnik dvigatelestroeniya [Bulletin of engine building], 2009, no. 1, pp. 125-128. (in Russ.)

Egorova Yu.B., Davydenko L.V., Chibisova E.V., Belova S.B. Theoretical and statistical substantiation of stability of mechanical properties of semiproducts from titanium alloy Ti - 6 % Al - 4 % V [Teoreticheskoe i statisticheskoe obosnovanie stabil'nosti mekhanicheskikh svoystv polufabrikatov iz titanovogo splava Ti-6Al-4V], Metallovedenie i termicheskaya obrabotka metallov [Metallurgy and heat treatment of metals], 2018, no. 5 (755), pp. 4-12. (in Russ.)

Egorova Yu.B. I.S. Polkin, L.V. Davydenko Possibilities of an Improvement in Forged VT6 Alloy Disks via Chemical Composition Correction [Vozmozhnosti povysheniya kachestva pokovok diskov splava VT6 putem korrektirovki khimicheskogo sostava], [Tekhnologiya legkikh splavov] Technology of light alloys, 2015, no. 3, pp. 65-71. (in Russ.)

Egorova Yu.B., Davydenko L.V., Chibisova E.V., Belova S.B. Theoretical and Statistical Basis for Stability of Titanium Alloy Ti–6Al–4V Semiproduct Mechanical Properties, Metal Science and Heat Treatment, 2018, vol. 60, issue 5-6, pp. 277-284. DOI: 10.1007/s11041-018-0272-8

Ilyin A.A., Skvortsova S.V. et al. Correlation of structure and mechanical properties complex in titanium alloy VT6 [Vzaimosvyaz' struktury i kompleksa mekhanicheskikh svoystv v titanovom splave VT6], Titan, 2011, no. 1, pp. 26-29. (in Russ.)

Shell E.B., Semiatin S.L. Effect of initiation microstructure on the Plastic Flow and Dynamic Globularization during hot working of Ti-6Al-4V, Metallurgical and Materials Transaction A, 1999, vol. 30A, pp. 3219-3229. DOI: 10.1007/s11661-999-0232-4

Egorova Yu.B., Polkin I.S., Davydenko L.V. Statistical Evaluation оf Titanium Alloy Properties [Statisticheskaya otsenka svoystv tita-novykh splavov], Tekhnologiya legkikh splavov [Technology of light alloys], 2015, no. 1, pp. 27-36. (in Russ.)

Egorova Yu.B., Polkin I.S., Davydenko L.V. Stability assessment for chemical composition and mechanical properties of semi-finished products from titanium alloys [Otsenka stabil'nosti khimicheskogo sostava i mekhanicheskikh svoystv polufabrikatov iz titanovykh splavov], Titan, 2016, no. 1, pp. 12-19. (in Russ.)

Gray G.T., Luetjering G. The effect of microstructure and stress ratio on fatigue crack propagation behavior of Ti-6Al-4V, Titanium'84: Science and Technology, Fifth International Conference on Titanium, Munich, Germany, 1984. vol. 3, pp. 2002-2008.

Hall I.W., Hammond C. Fracture Toughness, Strength and Microstructure in Alpha + Beta Titanium Alloys, Titanium and Titanium Alloys, Plenum Press, 1976, vol. 1, pp. 601-613.

Rudinger K., Fischer D. Relationship between primary alpha content, tensile properties and high cycle fatigue behavior of Ti-6Al-4V, Titanium'84: Science and Technology, Fifth International Conference on Titanium, Munich, Germany, 1984, vol. 3, pp. 2123-2130.

Shibanov A.S., Levin I.V., Tetyukhin V.V. et al. Production of large-sized forgings from VT6ch alloy for glider parts of wide-body aircraft [Proizvodstvo krupnogabaritnykh shtampovok iz splava VT6ch dlya detaley planera shirokofyuzelyazhnykh samoletov], Titan, 1996, no. 1 (9), pp. 29-31. (in Russ.)

Altman P.S., Leder M.O. Some aspects of production process for Titanium Alloys with the specified physical and chemical properties, Titanium-99: Science and technology, S-Petersburg, Prometey, 1999, vol.3, pp. 1534-1536.

Ponomarev V.V., Korableva I.V., Gaslov G.D. General issues of production and use of light and special alloys [Obshchie voprosy proizvodstva i primeneniya legkikh i spetsial'nykh splavov], Tekhnologiya legkikh splavov [Technology of light alloys], 2002, no. 1, pp. 50-60. (in Russ.)

Borovikov V.P. Populyarnoe vvedenie v sovremennyy analiz dannykh v sisteme STATISTICA [A popular introduction to modern data analysis in the STATISTICA system], Moscow, Hot line - Telecom, 2013, 288 p.




DOI: http://dx.doi.org/10.24892/RIJIE/20190408

Refbacks

  • There are currently no refbacks.


Copyright (c) 2020 Yu. B. Egorova, I. M. Mamonov, L. V. Davydenko

© Russian Internet Journal of Industrial Engineering. ISSN 2310-0818

E-mail: indust.engineering.ru@gmail.com

Another version of the web site: http://indust-engineering.ru