Estimation of the Limit State Criterion for Steels C1020 and A 516-55 with V-Notch under Quasistatic Loading Using Acoustic Emission Control

Abstract:

There is a need to determine the stresses value for responsible designs in the oil and gas refining, petrochemical and chemical industries, at which the defect reaches its maximum size. This stress value can be taken as the limit state criterion for strength calculations of vessels and apparatus. The article presents a technique for determining the limit state criterion for carbonaceous and low-alloy steels using the example of steels C1020 and A 516-55 in the state of delivery. As a limit state criterion it is proposed to use the stress value corresponding to the microcrack formation moment. The studies are based on the uniaxial tension tests results at room temperature of flat samples with V-shaped stress concentrators of 2 mm deep, accompanied by an acoustic emission nondestructive testing method. Based on the obtained pulse amplitude and pulse energy dependences on time in the process of testing and fractographic studies, a technique for estimating acoustic emission signals was developed to determine the microcrack formation moment for test steels. Stress values that can be taken as the limit state criterion for steels C1020 and A 516-55 in the delivery state for strength calculations vessels and apparatus are determined using the developed experimentally technique based on the high-amplitude acoustic emission to low-amplitude signals ratio. With the help of specimen fractures fractographic analysis the legitimacy of using the developed technique is justified. Thus, at room temperature for steel C1020, the stress at which a microcrack begins to form is 420 MPa, for steel A 516-55 it is 455 MPa.

• Periodical: Materials Science Forum (Volume 945)
• Pages: 585-591
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.945.585
• Online since: February 2019
• Authors: M.M. Zakirnichnaya*, O.R. Abdulganieva, D.A. Yudicheva
• Keywords: Acoustic Emission Method, Fractographic Analysis, Limit State, Permissible Stress, Strength Calculation

References

[1] V.V. Luneff, Razrabotka metodov rascheta construktivnoy prochnosti bazovih elementov neftegazovih ob'ektov. Dissertacija na soiskanie stepeni kandidata tehnicheskih nauk. Ufa. (2011).

[2] E.A. Naumkin, Т.R. Bikbulatov, I.R. Kuzeev, Estimation of the limiting state of steel in terms of the parameters of an alternating electric signal. Electronic scientific journal Oil and gas business,. 5 (2011) 394-399.

[3] V.K. Vostrov. Prochnost', treshchinostojkost' i konstruktivnaya bezopasnost' stroitel'nyh metallokonstrukcij na baze razvitiya linejnoj mekhaniki razrusheniya. Dissertacija na soiskanie stepeni doktora tehnicheskih nauk. (2009).

[4] M.M. Zakirnichnaya, V.K. Berdin, N.Ju. Kirillova, Estimation of the stress-strain state of the reaction column by the finite element method taking into account the change in material properties under long-term operation conditions. The electronic scientific journal Oil and gas business,. 2 (2006).

[5] I.R. Kuzeev, M.M. Zakirnichnaya, V.K. Berdin, N.Ju. Kirillova, Analysis of changes in the structure and properties of steel 20 under long-term operation conditions. News of higher educational institutions. Oil and gas. 4 (2006) 75-82.

[6] I.R. Kuzeev, M.M. Zakirnichnaya, The change in the temperature of the brittle-viscous transition of a metal of two-layer steel 16GS + 08X13 in the process of long-term operation. Innovations, problems of engineering science, management processes and critical technologies in machine building RB. Ufa: UGATU. (2009) 37-38.

[7] M.M. Zakirnichnaya, Т.F. Khalitov, Determination of the critical length of the transverse crack of the rotor shaft of the pump set. All-Russian Scientific and Practical Seminar Energy Efficiency and Energy Security at Enterprises of Industry and Housing and Communal Services". AN RB, GANU "Institute for Applied Research,. Salavat: Guillem. (2010) 273-276.

[8] S.O. Gevlich, S.A. Pegisheva, The selection of criterion for the limiting state of diagnosed metal structures. Izvestiya (news). Volgograd State Technical University. 4 (64) (2010) 183-187.

[9] A.V. Samigullin, E.A. Naumkin, I.R. Kuzeev, Calculation and experimental determination of the limiting state of the material of the shell structure subjected to low-cycle loading. Electronic scientific journal Oil and gas business,. 5 (2014) 404-419.

DOI: 10.17122/ogbus-2014-5-404-419

[10] M.M. Zakirnichnaya, Т.Ф. Khalitov, Detection of the fatigue transverse crack on the shaft of the rotor system on the basis of modal analysis and vibroacoustic diagnostics. Fundamental and applied problems of technology and technology. 5-2 (2010) 124-132.

[11] I.R. Kuzeev, N.M. Zakharov, G.I. Evdokimov, Damage to Column Apparatus for Oil Refining and Petrochemistry: Proc. allowance. Ufa. UGNTU. (1997).

[12] S.A. Akhmetov, T.P. Serikov, I.R. Kuzeev, M.I. Bayazitov, Technology and equipment for oil and gas processing: Textbook. Saint Petersburg. Nedra. (2006).

[13] N.A. Makhutov, Structural strength, resource and technogenic safety. Novosibirsk: Science. Part 1: Criteria of Strength and Resource. (2005).

[14] N.A. Makhutov Structural strength, resource and technogenic safety. Novosibirsk: Science. Part 2: Justification of the resource and security. (2005).

[15] N.A. Makhutov, Generalized regularities of the processes of deformation and destruction. Vestnik Rossiyskoi Akademii Nauk. 87 (5) (2017) 407-428.

[16] M.M. Zakirnichnaya, A.B. Zakiryanova, V.M. Greshnov, Peculiarities of the determination of the limit state criterion for carbonaceous and low alloyed steels. Electronic scientific journal Oil and gas business,. 6 (2012) 419-424.

[17] M.M. Zakirnichnaya, A.B. Zakiryanova. Determination of the limit state criterion for steel samples 20. Intensification of heat and mass exchange processes, industrial safety and ecology: Proceedings of the third All-Russian Student Scientific and Technical Conference. (2012) 330-334.

[18] V.V. Klyuev, Non-destructive testing: reference book. Mechanical Engineering. 7 (2005).

[19] GOST 1497-84. Metals. Methods of tensile testing. - with changes N 1, 2, 3.-M.: Standardinform. (2008).

[20] M.M. Zakirnichnaya, O.R. Abdulganieva, DA Yudiceva. Possibility of establishing the ultimate metal state of oil and gas processing equipment using acoustical emission control. Collection of scientific papers on the materials of the XIX International Scientific and Practical Conference. Samara: L-Journal. 19-2 (2016) 17-19.