Abstract
The structure and impact toughness of the pipeline 17Mn1Si steel have been studied. The main attention was paid to the analysis of various conditions of stress concentration under dynamic loadings. The process of strain localization with increasing stress state stiffness at the tip of the concentrator with decreasing testing temperature was investigated. Impact loading diagrams for specimens with various stress concentrator shapes were registered and analyzed.
Highlights
Increasing service life time of structural elements is one of the most difficult and actual requirements for transportation engineering
The actual problem is to improve the operational properties of pipe steel by providing higher mechanical properties [3]
Pipe steels are characterized by high values of impact toughness
Summary
Increasing service life time of structural elements is one of the most difficult and actual requirements for transportation engineering. This paper studies the influence of the notch shape on the impact fracture of 17Mn1Si steel at different, first of all, negative temperatures. Let us note that the form of the obtained impact toughness dependences for specimens with sharp V- and I-notches almost coincide within the entire studied temperature range.
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