http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Stoja Rešković (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Distribution of Stress in Deformation Zone of Niobium Microalloyed Steel
Ivan Jandrlić,Stoja Rešković,Tin Brlić 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.4
Microalloyed steels today represent a signifi cant part of total world production and processing of steel. Although widelyused, there are scarce data on the stress distribution in the deformation zone of these steels. Research was carried out ontwo steel grades, both low-carbon structural steels with the same basic chemical composition, with one of them additionallymicroalloyed with niobium. Differences in the stress distribution in the deformation zone between two tested steels werecontinuously observed and measured using the methods of digital image correlation and thermography. It has been foundout that niobium microalloyed steel has signifi cantly more complex material fl ow and stress distribution in the deformationzone when compared to the plain low carbon steel.
-
Influence of Niobium Content on Strain Amount in Lüders Bands in Niobium Microalloyed Steel
Tin Brlić,Stoja Rešković,Ivan Jandrlić 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.2
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.
-
Dependence of Thermoelastic Effect on Volume Change by Elastic Deformation
Ivan Jandrlić,Stoja Rešković,Franc Vodopivec,Pascal Lava 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.3
Thermo-graphic investigations were carried out on niobium microalloyed steel. During tensile testing temperature changes of samples, due to elastic and plastic deformation, were measured using infrared camera. The results of temperature measurements indicate that the specimen’s temperature is lowered during the elastic deformation. This temperature drop is in other studies associated with so-called thermo-elastic effect which occurs in the metals during elastic deformation. Parallel with the infrared camera, surface of samples was recorded with digital imaging camera. Analysis of recorded images was analyzed using digital image correlation method. This is used to determine the deformation that occurs during stretching. The results show that during elastic deformation of samples the volume of samples is slightly increased. The volume change of samples and temperature drop, due to thermo-elastic effect, are compared for all samples. The analysis of experimental results explains that the thermo-elastic effect is directly related to the change of specimen volume during the elastic deformation of steel.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
