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자료유형
학술저널
저자정보
Tin Brlić (University of Zagreb) Stoja Rešković (University of Zagreb) Ivan Jandrlić (University of Zagreb)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.2
발행연도
2020.1
수록면
179 - 187 (9page)

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In this paper, the infuence of niobium content on strain amounts in various areas of Lüders bands propagation was investigated. The tests were simultaneously performed by a static tensile test and a digital image correlation in microalloyedsteel with the same base chemical composition but with diferent addition of 0.035% and 0.06% of niobium. Strain changeswere determined by a qualitative and quantitative analysis using a digital image correlation in the area of maximum strainamount behind the Lüders band front (position 1), on the Lüders band front (position 2) and in front of the Lüders band front(position 3). Diferent deformation behavior of Lüders bands was found in the examined samples with diferent addition ofmicroalloying element niobium. The area behind the Lüders band front (position 1) showed the highest strain amounts inrelation to the other two examined areas. The steel with 0.035% of niobium indicates higher strain amounts in the area ofmaximum strain behind the Lüders band front (position 1) compared to the steel with 0.06% of niobium which is associatedwith dislocation density and grain size. This diference is lower on the Lüders band front (position 2) and in front of theLüders band front (position 3). There were no signifcant changes in the strain amount with the change of niobium content.

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