Influence of the cutting direction of the Charpy specimens from the steel 10GN2MFA on the components of the fracture energy and the ductile-to-brittle transition temperature https://doi.org/10.33108/visnyk_tntu2017.04.026
Article Sidebar
Main Article Content
Abstract
The Charpy specimens impact tests are one of more simple and inexpensive methods to determine the mechanical properties of materials. The results of these tests can be used to estimate the strength and durability of large-scale structures. A series of the Charpy specimens impact test from high-alloyed high-temperature resistant steel10GN2MFA were carried out in the temperature range of –130 ÷ +70ºС with control of cutting direction. The tests were conducted on instrumented vertical impact machine, which can record a full diagram of specimen’s deformation and fracture. The values of total energy of deformation and fracture and its
components: energy of crack initiation, energy of ductile crack growth, brittle cracks energy and ductile rupture energy were determined. It was found, that ductile-brittle transition temperature for specimens cut in longitudinal direction (group GK) is higher than for specimens cut in transversal direction (group GO). It is shown, that the cutting direction of Charpy specimens significantly influences the values of total energy of deformation and fracture and its components, and the values of the ductile-brittle transition temperature for 10GN2MFA steel.
Article Details
Issue
Section
This work is licensed under a Creative Commons Attribution 4.0 International License.
References
1. Fridman Ya. B. Mehanicheskie svoystva metallov. Izd.3-e pererab. I dop. V dvuh chastyah. Chast vtoraya. Mehanicheskie ispyitaniya. Konstruktsionnaya prochnost. M., “Mashinostroenie”, 1974 [in Russian]
2. Ashkenazi E.K., Ganov. E.V. Anizotropiya konstruktsionnyih materialov: Spravochnik, 2-e izd., pererab. I dop. L, Mashinostroenie”. Leningr. Otd-nie, 1980. 247p. [in Russian].
3. Dehterinskiy L.V., Esenberlin R.E., Akmaev K.H. i dr., Kapitalnyiy remont avtomobiley: Spravochnik., M., Transport, 1989. -335i., il., tabl. ISBN 5-277-00457-2 [in Russian].
4. Lanchakov G.A., Zorin E.E., Pashkov Yu. I., Stepanenko A.I. Rabotosposobnost truboprovodov: v 3-h ch. 2001. Ch. 2. Soprotivlyaemost razrusheniyu. 350 M. Nedra-Biznestsentr [in Russian].
5. Kharchenko V.V., Kondryakov E.A., Zhmaka V.N., Babutskiy A.A., Instrumentirovannyiy koper dlya udarnyih ispyitaniy: osnovnyie elementyi, analiz rabotosposobnosti, NadYozhnost i dolgovechnost mashin i sooruzheniy. 2006. 27. P. 121 – 130 [in Russian].
6. Kondryakov E.A., Zhmaka V.N., Kharchenko V.V. et al. Sistema izmereniya deformatsiy i usiliy pri dinamicheskih ispyitaniyah, Problemyi prochnosti. 2005. 3. P. 140 – 146 [in Russian].
7. ISO 14556. Steel Charpy V-Notch Pendulum Impact Test Instrumented Test Method. 05.01.2005 [in English].
8. GOST 9454-78. Metallyi. Metod ispyitaniya na udarnyiy izgib pri ponizhennyih, komnatnoy i povyishennyih temperaturah. Vved. 01.01.79 [in Russian].
9. Kharchenko V.V., Kondryakov E.A., Zhmaka V.N., Babutskiy A.A., Babutskiy A.I., Vliyanie temperaturyi i skorosti nagruzheniya na energiyu zarozhdeniya i rasprostraneniya treschin v obraztsah Sharpi iz uglerodistyih staley., ISSN 0556-171X. Problemyi prochnosti, 2006, № 5. P. 120 – 127 [in Russian].
10. Goritskiy V.M., Diagnostika metallov [Tekst]. M. “Metallurgizdat”, 2004. 408p. [in Russian].