BRITTLENESS PROBLEM OF PUDDLED STEEL RESULTING FROM MICROSTRUCTURAL DEGRADATION PROCESSES IN TERMS OF STATIC, CYCLIC AND DYNAMIC TESTS
Journal Title: Scientific Journal of the Military University of Land Forces - Year 2011, Vol 162, Issue 4
Abstract
In the paper the investigation results of puddled steel from nineteenth-century constructions are presented. The results of static tensile tests after more than 130-year operating period: fracture toughness, the critical value of the J integral and the fatigue crack growth, and dynamic tests – toughness results are presented in this article. The results show a significant effect of degradation processes. The abovementioned processes caused the brittleness of puddled steel. All the tests were performed for the material in two states, i.e. post-operated and normalised ones. In accordance with the guidelines developed in the framework of the degradation theory [4] and its material aspects [8], normalising is designed to reproduce the microstructure of steel in the initial state. The results presented allow us to draw the conclusions about trends related to the nature and future negative changes in mechanical properties.
Authors and Affiliations
Grzegorz LESIUK, Józef RABIEGA, Mieczysław SZATA
Keywords
Related Articles
- EP ID EP61414
- DOI -
- Views 51
- Downloads 0
LIGHT AIR DEFENCE ASSETS IN PROTECTION OF LAND FORCES SUB-UNITS
Contemporary armed forces have to be ready to counteract the emerging security threats to world peace. The technical and technological development of military armament aims to achieve the effectiveness of armed forces op...
Hazards and their reduction in urea production for synthesis reactor by Mitsui - Toatsu technology
Industrial large-scale urea production creates a number of hazards due to equipment and machine failures as well as service errors. Failures can cause material, environmental and human losses. The work presents the asses...
Assessment of the company’s motivation system in the employees’ perception – case study
Nowadays, organizations through the appropriate motivational activities create employee behavior. They should apply available material and non-material incentives in a sustainable manner. Therefore, it is necessary to cr...
WSPÓŁCZESNE ROZUMIENIE BEZPIECZEŃSTWA, ZAGROŻEŃ I OBRONNOŚCI
W artykule podjęto próbę zdefiniowania pojęcia bezpieczeństwa w sensie generalnym. Autor porusza problematykę związaną z dualizmem tego zagadnienia – z jednej strony jest to bezpieczeństwo państwa – którego kryterium sta...
HARMONOGRAMOWANIE PRZEDSIĘWZIĘCIA BUDOWLANEGO PRZY OGRANICZONEJ W CZASIE DOSTĘPNOŚCI PODWYKONAWCÓW
Realizacja złożonych przedsięwzięć budowlanych obejmuje zadania powierzane podwykonawcom, wymagające specjalistycznych umiejętności lub których wykonanie przekracza zdolności produkcyjne generalnego wykonawcy w umownym o...