Naslov
Influence of strain rate on stress changes during Lüders bands formation and propagation

Autori
Brlić, Tin ; Rešković, Stoja ; Jandrlić, Ivan ; Skender, Filip

Izvornik
IOP conference series. Materials science and engineering (1757-8981) 461 (2018), 1; 1-6

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Lüders bands, stress changes, thermography

Sažetak
Characterization of the Lüders bands that occur in niobium microalloyed steel is carried out in different points of their formation and propagation. During static tensile testing infrared thermography is simultaneously used to record temperature changes and digital image correlation to determine the strain amounts in specific points of Lüders bands formation and propagation. Temperature changes which present stress changes were taken at the different strain amounts 0.005 mm/mm, 0.013 mm/mm, 0.026 mm/mm and 0.032 mm/mm. Performed static tensile tests showed the influence of different strain rates 1.8•10-3 s-1, 7•10-3 s-1 and 1.85•10-2 s-1 on the stress changes during Lüders bands formation and propagation. In different specific points such as Lüders band front, behind the Lüders band front (deformed area) and in front of the Lüders band front (undeformed area) tests were carried out. The studies revealed maximum stress changes behind Lüders band front and their increase with increasing strain rate. At the highest strain rate in the point of maximum stress behind the Lüders band front the greatest temperature changes was measured.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija, Interdisciplinarne tehničke znanosti

Napomena
Rad je usmeno prezentiran na COMAT 2018 5th International Conference On Recent Trends In Structural Materials, Pilsen, Republika Češka, 14.-16.11.2018. Sažetak u COMAT 2018 5th International Conference On Recent Trends In Structural Materials, Moravska Ostava, Czech Republic: TANGER Ltd., 2018. 1-6 (ISBN: 978-80- 87294-86-4.

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