Email this article Experimental studies of high-temperature creep of titanium alloy VT6 under conditions of a complex stress state under the influence of an aggressive medium
- Authors: Igumnov L.A.1,2, Kazakov D.A.1,2, Shishulin D.N.1,2, Modin I.A.1,2, Zhegalov D.V.2
-
Affiliations:
- Samara State Technical University
- Research Institute of Mechanics, National Research Lobachevsky State University of Nizhny Novgorod
- Issue: Vol 25, No 2 (2021)
- Pages: 286-302
- Section: Mechanics of Solids
- Submitted: 29.10.2021
- Published: 30.06.2021
- URL: https://journals.eco-vector.com/1991-8615/article/view/84071
- DOI: https://doi.org/10.14498/vsgtu1850
- ID: 84071
Cite item
Full Text
Abstract
The results of experimental studies of high-temperature creep and long-term strength under conditions of a uniaxial and complex stress-strain state are presented. Tests for uniaxial tension, torsion and their combined action.
The tests were carried out on laboratory tubular specimens made of VT6 material at a temperature of 600\(\,^\circ\)C as delivered and under conditions of exposure to an aggressive environment. An aggressive environment was created by preliminary hydrogenation of laboratory samples with different hydrogen-ion concentration by mass \(\mathrm{C}_m\) equal to 0.15 % and 0.3 %.
Experimental information for the construction of material parameters and scalar functions of a thermal creep model with isotropic-kinematic hardening is presented. This information is obtained from basic experiments to determine: the initial radius of the zero level creep surface; fans of creep curves at different levels of specified stresses, with obtaining the characteristics of the third section on the creep diagram, which precedes the failure of the sample at a fixed temperature at a given time interval; torsional creep curves up to the moment of loss of stability in the working part of the specimen. Based on the results of tests for uniaxial loading, two levels of stress intensity were selected, with different combinations of which experiments were carried out under conditions of complex loading.
The results of experimental studies of high-temperature creep and long-term strength under several different programs of isothermal loading under conditions of a complex stress-strain state are presented. Investigations are carried out for specimens made of VT6 alloy at delivery condition, under conditions of exposure to an aggressive environment. The obtained experimental information makes it possible to determine the necessary material parameters and to verify the used mathematical model of thermal creep.
About the authors
Leonid A. Igumnov
Samara State Technical University;Research Institute of Mechanics, National Research Lobachevsky State University of Nizhny Novgorod
Email: igumnov@mech.unn.ru
ORCID iD: 0000-0003-3035-0119
SPIN-code: 1722-9667
Scopus Author ID: 14121358200
ResearcherId: E-3487-2014
http://www.mathnet.ru/person143791
Dr. Phys. & Math. Sci., Professor; Leading Researcher; Dept. of Applied Mathematics and Computer Science1; Chief Researcher; Lab. of Simulation of Physical and Mechanical Processes2
244, Molodogvardeyskaya st., Samara, 443100, Russian Federation; 23, korp. 6, pr. Gagarina, Nizhny Novgorod, 603022, Russian FederationDmitriy A. Kazakov
Samara State Technical University;Research Institute of Mechanics, National Research Lobachevsky State University of Nizhny Novgorod
Email: kazakov@mech.unn.ru
ORCID iD: 0000-0002-9316-4105
SPIN-code: 6225-3268
Scopus Author ID: 7007110190
ResearcherId: J-4288-2017
http://www.mathnet.ru/person175252
Cand. Techn. Sci.; Researcher; Dept. of Applied Mathematics and Computer Science1; Researcher; Lab. of Physical and Mechanical Testing of Materials2
244, Molodogvardeyskaya st., Samara, 443100, Russian Federation; 23, korp. 6, pr. Gagarina, Nizhny Novgorod, 603022, Russian FederationDenis N. Shishulin
Samara State Technical University;Research Institute of Mechanics, National Research Lobachevsky State University of Nizhny Novgorod
Email: shishulindn@gmail.com
ORCID iD: 0000-0002-6527-557X
Scopus Author ID: 54384303100
http://www.mathnet.ru/person175253
Cand. Techn. Sci.; Researcher; Dept. of Applied Mathematics and Computer Science1; Researcher; Lab. of Physical and Mechanical Testing of Materials2
244, Molodogvardeyskaya st., Samara, 443100, Russian Federation; 23, korp. 6, pr. Gagarina, Nizhny Novgorod, 603022, Russian FederationIvan A. Modin
Samara State Technical University;Research Institute of Mechanics, National Research Lobachevsky State University of Nizhny Novgorod
Email: mianet@mail.ru
ORCID iD: 0000-0002-3561-4606
SPIN-code: 4839-8129
Scopus Author ID: 57192279101
ResearcherId: E-9088-2019
http://www.mathnet.ru/person138504
Cand. Techn. Sci.; Researcher; Dept. of Applied Mathematics and Computer Science1; Researcher; Lab. of Simulation of Physical and Mechanical Processes2
244, Molodogvardeyskaya st., Samara, 443100, Russian Federation; 23, korp. 6, pr. Gagarina, Nizhny Novgorod, 603022, Russian FederationDmitriy V. Zhegalov
Research Institute of Mechanics, National Research Lobachevsky State University of Nizhny Novgorod
Author for correspondence.
Email: zhegalov@mech.unn.ru
ORCID iD: 0000-0002-7282-598X
SPIN-code: 4067-1748
Scopus Author ID: 38362786600
http://www.mathnet.ru/person175254
Cand. Techn. Sci.; Senior Researcher; Lab. of Problems of Strength, Dynamics and Resource2
23, korp. 6, pr. Gagarina, Nizhny Novgorod, 603022, Russian FederationReferences
- Volkov I. A., Igumnov L. A., Kazakov D. A., Shishulin D. N., Tarasov I. S. State equations of unsteady creep under complex loading, J. Appl. Mech. Techn. Phys., 2018, vol. 59, no. 3, pp. 551–560. https://doi.org/10.1134/S0021894418030203.
- Volkov I. A., Igumnov L. A., Tarasov I. S., Shishulin D. N., Smetanin I. V. Evaluating long-term strength of structural elements subjected to thermal-mechanical loading, Problems of Strength and Plasticity, 2018, vol. 80, no. 4, pp. 495–512 (In Russian). https://doi.org.10.32326/1814-9146-2018-80-4-494-512.
- Lokoshchenko A. M. Creep and long-term strength of metals. Boca, Raton, CRC Press, 2018, xviii+545 pp. https://doi.org/10.1201/b22242.
- Volkov I. A., Igumnov L. A., Kazakov D. A., Mironov A. A., Tarasov I. S., Shishulin D. N., Smetanin I. V. damaged medium model for describing the process of long-term strength of structural materials (metals and their alloys), Problems of Strength and Plasticity, 2017, vol. 79, no. 3, pp. 285–300 (In Russian). https://doi.org/10.32326/1814-9146-2017-79-3-285-300.
- Bondar V. S., Abashev D. R., Petrov V. K. Comparative analysis of variants of plasticity theories under cyclic loading, PNRPU Mechanics Bulletin, 2017, no. 2, pp. 23–44 (In Russian). https://doi.org/10.15593/perm.mech/2017.2.02.
- Ohashi Y., Kawai M., Kaito T. Inelastic behavior of type 316 stainless steel under multiaxial nonproportional cyclic stressings at elevated temperature, J. Eng. Mater. Technol., 1985, vol. 107, no. 2, pp. 101–109. https://doi.org/10.1115/1.3225781.
- Murakami S., Imaizumi T. Mechanical description of creep damage state and its experimental verification, J. Mec. Theor. Appl., 1982, vol. 1, no. 5, pp. 743–761.
- Gorokhov V., Kazakov D., Kapustin S., Churilov Y. Simulation of fracture of heat-resistant alloys under creep and neutron irradiation conditions, Procedia Structural Integrity, 2020, no. 28, pp. 1416–1425. https://doi.org/10.1016/j.prostr.2020.10.114.
- Rabotnov Yu. N. Creep problems in structural members. Amsterdam, London, North-Holland Publ., 1969, xiv+822 pp.
- Radchenko V. P., Eremin Yu. A. Reologicheskoe deformirovanie i razrushenie materialov i elementov konstruktsii [Rheological Deformation and Destruction of Materials and Structural Elements]. Moscow, Mashinostroenie-1, 2004, 263 pp. (In Russian)
- Murakami S., Ohno N. A constitutive equation of creep based on the concept of a creep-hardening surface, Int. J. Solids Struct., 1982, vol. 18, no. 7, pp. 597–609. https://doi.org/10.1016/0020-7683(82)90042-7.
- Igumnov L. A., Vlasov S. Y., Kazakov D. A., Zhegalov D. V., Modin I. A. Experimental studies of elastic-plastic deformation of structural materials under conditions of triaxial loading, In: Multiscale Solid Mechanics, Advanced Structured Materials, 141. Cham, Springer, 2021, pp. 203–212. https://doi.org/10.1007/978-3-030-54928-2_16.
- Kochetkov A. V., Leont’ev N. V., Modin I. A., Savikhin A. O. Study of the stress-strain and strength properties of the metal woven grids, Vestn. Tomsk. Gos. Univ. Mat. Mekh. [Tomsk State University Journal of Mathematics and Mechanics], 2018, no. 52, pp. 53–62 (In Russian). https://doi.org/10.17223/19988621/52/6.
- Modin I. A., Kochetkov A. V., Leontiev N. V. Numerical simulation of quasistatic and dynamic compression of a granular layer, AIP Conference Proceedings, 2019, vol. 2116, 270003. https://doi.org/10.1063/1.5114277.
- Balandin V. V., Kochetkov A. V., Krylov S. V., Modin I. A. Numerical and experimental study of the penetration of a package of woven metal grid by a steel ball, J. Phys.: Conf. Ser., 2019, vol. 1214, 012004. https://doi.org/10.1088/1742-6596/1214/1/012004.
- Kazakov D. A., Kapustin S. A., Korotkikh Yu. G. Modelirovanie protsessov deformirovaniia i razrusheniia materialov i konstruktsii [Modeling of the Processes of Deformation and Fracture of Materials and Structures]. Nizhny Novgorod, Nizhny Novgorod State Univ., 1999, 226 pp. (In Russian)
- Volkov I. A., Korotkikh Yu. G. Uravneniia sostoianiia viazkouprugoplasticheskikh sred s povrezhdeniiami [Equations of State of Viscoelastic Plastic Media with Damage]. Moscow, Fizmatlit, 2008, 424 pp. (In Russian)
- Kapustin S. A., Gorokhov V. A., Churilov Y. A. Numerical simulation of the failure process for an experimental sample with a concentrator under plane bending conditions, J. Mach. Manuf. Reliab., 2010, vol. 39, no. 6, pp. 549–553. https://doi.org/10.3103/S1052618810060063.
- Volkov I. A., Igumnov L. A., Korotkikh Yu. G., Kazakov D. A., Emelyanov A. A., Tarasov I. S., Guseva M. A. Software implementation of viscoplastic deformation and damage accumulation processes in structural alloys under thermal-mechanical loading, Problems of Strength and Plasticity, 2016, vol. 78, no. 2, pp. 188–207 (In Russian). https://doi.org/10.32326/1814-9146-2016-78-2-188-207.
Supplementary files
