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Advances in Materials Science and Engineering
Volume 2017 (2017), Article ID 9867217, 12 pages
https://doi.org/10.1155/2017/9867217
Research Article

Effect of Temperature-Force Factors and Concentrator Shape on Impact Fracture Mechanisms of 17Mn1Si Steel

1Institute of Strength Physics and Materials Science, SB RAS, Tomsk, Russia
2National Research Tomsk Polytechnic University, Tomsk, Russia
3Ternopil Ivan Pul’uj National Technical University, Ternopil, Ukraine
4Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Trondheim, Norway

Correspondence should be addressed to S. V. Panin; moc.liamg@17yegresninap

Received 8 September 2016; Accepted 5 December 2016; Published 23 January 2017

Academic Editor: Yuri Ribakov

Copyright © 2017 S. V. Panin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The influence of the notch shape on the impact fracture of 17Mn1Si steel is investigated at different temperatures with the focus placed on the low-temperature behavior. An approach towards fracture characterization has been suggested based on the description of elastic-plastic deformation of impact loaded specimens on the stage of crack initiation and growth at ambient and lower temperatures. The analysis of the impact loading diagrams and fracture energy values for the pipe steel 17Mn1Si revealed the fracture mechanisms depending on the notch shape. It was found that the testing temperature reduction played a decisive role in plastic strain localization followed by dynamic fracture of the specimens with differently shaped notches. A classification of fracture macro- and microscopic mechanisms for differently notched specimens tested at different temperatures was proposed which enabled a self-consistent interpretation of impact test results.