A method for evaluating the sizes and determining the shape of the zone of plastic strain of high-toughness structural steels using the results of systematic automated measurement of microhardness is developed. Techniques allowing for anomalies in the measurement of microhardness in the zone of plastic strain and in the zone of unstrained (matrix) material are suggested. Special features of formation of the studied zone in the region of the start of dynamic crack are described. The dependence of the sizes of the zone of plastic strain on the tempering temperature is determined.
Similar content being viewed by others
References
M. N. Georgiev and Yu. N. Simonov, Crack Resistance of Iron-Carbon Alloys [in Bulgarian], BULVEST 2000, Sofia (2011).
Yu. N. Simonov, A. P. Nishta, S. S. Yugay and A. S. Pertsev, “Refinement of steel 35Kh up to the nanolevel with the aim of creating a material for pressure vessels,” Metalloved. Term. Obrab. Met., No. 11, 7 – 12 (2010).
L. Ts. Zayats, D. O. Panov, and Yu. N. Simonov, “Refinement of the structure of steels under conditions of intense thermal action. Part 2. A study of the effect of alloying system on the evolution of structure in austenization,” Metalloved. Term. Obrab. Met., No. 11, 20 – 25 (2010).
M. I. Georgiev, Yu. N. Simonov, and M. Yu. Simonov, “Effect of crack length and side notches on implementation of plane strain under impact loading,” Zavod. Lab., Diagn. Mater., 76(9), 56 – 58 (2010).
D. Broek, Elementary Engineering Fracture Mechanics [Russian translation], Vysshaya Shkola, Moscow (1980), 386.
M. N. Georgiev, V. N. Danilov, N. Ya. Mezhova, and L. P. Strok, “Dependence of plastic strain in a fracture on fracture characteristics,” Fiz. Met. Metalloved., 43(2), 403 – 407 (1977).
M. N. Georgiev, N. Ya. Mezhova, L. P. Strok, and N. K. Shaurova, “Use of x-ray fractography for studying laws of fracture,” Zavod. Lab., No. 8, 54 – 57 (1981).
G. V. Klevtsov and G. B. Shvets, X-Ray Diffraction Analysis as a Method for Studying Fractures [in Russian], Mashinostroenie, Leningrad (1986), Issue 35, pp. 3 – 11.
G. V. Klevtsov, Plastic Zones and Diagnostics of Fracture of Metallic Materials [in Russian], MISiS, Moscow (1999), 112 p.
RD-50-54-52–88. Strength Computations and Tests. Method for X-Ray Diffraction Analysis of Fractures. Determination of the Depth of Zones of Plastic Strain under Fracture Surface [in Russian], VNIINMASh Gosstandarta SSSR, Moscow (1988).
E-Wen Huang, Soo Yeol Lee,WanchuckWoo, and Kuan-Wei Lee, “Three-orthogonal-direction stress mapping around a fatigue-crack tip using neutron diffraction,” Metall. Mater. Trans. A, 43(8), 2785 – 2791 (2012), DOI: 10.1007/s11661-011-0904-8.
L. N. Brewer, D. P. Field, and C. C. Merriman, “Mapping and assessing plastic deformation using EBSD,” Electron Backsc. Diffr. Mater. Sci., 251 – 262 (2009), DOI: 10.1007/978-0-387-88136-2 18.
Helena Jin, We-Yang Lu, Sandip Haldar, and Hugh A. Bruck, “Microscale characterization of granular deformation near a crack tip,” J. Mater. Sci., 46(20), 6596 – 6602 (2011), DOI: 10.1007/s10853-011-5608-3.
S. J. Chang and S. M. Ohr, “Dislocation free zone model of fracture,” J. Appl. Phys., 52, 7174 – 7181 (1981).
K. F. Ha, Y. B. Xu, X. H. Wang, and Z. Z. An, “A study of the dislocation-free zone ahead of the crack tips in bulk metallic single crystal,” Acta Metall. Mater., 32(9), 1643 – 1651.
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 40 – 45, November, 2012.
Rights and permissions
About this article
Cite this article
Simonov, M.Y., Georgiev, M.N., Simonov, Y.N. et al. Evaluation of the sizes of the zone of plastic strain of high-toughness materials after dynamic tests by the method of systematic measurement of microhardness. Met Sci Heat Treat 54, 595–599 (2013). https://doi.org/10.1007/s11041-013-9555-2
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11041-013-9555-2