Impact loading curves and fracture energy of the notched 12Cr1MoV ductile steel specimens are analyzed. The qualitative description and quantitative parameters are obtained for major stages of ductile and brittle fracture depending on the shape of the notch and the stress stiffness ahead. It is shown that a zone with enhanced plasticity is formed in the vicinity of V-, U-, and I-shaped notches at 20°C testing temperature, giving rise to ductile fracture. The stress stiffness at the notch tip increased with testing temperature reduced to –40°C. Using the quantitative description of fracture surfaces, a physical-mechanical scheme of the specimen fracture was suggested for the case of enhanced and localized (constrained) plasticity near the stress concentrator tip.
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10 November 2016
ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
19–23 September 2016
Tomsk, Russia
Research Article|
November 10 2016
Influence of notch shape on deformation mechanisms and energy parameters of fracture of 12Cr1MoV steel under impact loading
S. V. Panin;
S. V. Panin
a)
1
Institute of Strength Physics and Materials Science SB RAS
, Tomsk, 634055 Russia
2
National Research Tomsk Polytechnic University
, Tomsk, 634050 Russia
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I. V. Vlasov;
I. V. Vlasov
b)
1
Institute of Strength Physics and Materials Science SB RAS
, Tomsk, 634055 Russia
2
National Research Tomsk Polytechnic University
, Tomsk, 634050 Russia
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P. O. Maruschak;
P. O. Maruschak
c)
3
Ternopil Ivan Pul’uj National Technical University
, Ternopil, 46001 Ukraine
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D. D. Moiseenko;
D. D. Moiseenko
d)
1
Institute of Strength Physics and Materials Science SB RAS
, Tomsk, 634055 Russia
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F. Berto;
F. Berto
e)
4Department of Management and Engineering,
University of Padova
, Vicenza, 36100 Italy
5Department of Engineering Design and Materials,
NTNU
, Trondheim, 7491 Norway
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A. Vinogradov;
A. Vinogradov
f)
5Department of Engineering Design and Materials,
NTNU
, Trondheim, 7491 Norway
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R. T. Bischak
R. T. Bischak
g)
6
Ivano-Frankivsk National Technical University of Oil and Gas
, Ivano-Frankivsk, 76000 Ukraine
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AIP Conf. Proc. 1783, 020183 (2016)
Citation
S. V. Panin, I. V. Vlasov, P. O. Maruschak, D. D. Moiseenko, F. Berto, A. Vinogradov, R. T. Bischak; Influence of notch shape on deformation mechanisms and energy parameters of fracture of 12Cr1MoV steel under impact loading. AIP Conf. Proc. 10 November 2016; 1783 (1): 020183. https://doi.org/10.1063/1.4966477
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