Akademska digitalna zbirka SLovenije - logo
E-viri
Celotno besedilo
Recenzirano
  • Effect of Micro‐Alloy Eleme...
    Ezatpour, Hamid Reza; Torabi‐Parizi, Marziyeh; Ebrahimi, Gholam Reza; Momeni, Amir

    Steel research international, July 2018, 2018-07-00, 20180701, Letnik: 89, Številka: 7
    Journal Article

    In this research, the hot deformation behavior and dynamic recrystallization (DRX) of strategic Nb and V‐bearing high‐Mn steels are investigated. Therefore, the hot compression tests are performed at temperature range of 850–1150 °C with temperature interval of 100 °C and strain rates of 0.001, 0.01, 0.1, and 1 s−1. The peak stress, temperature, and strain rate for steels are related by the hyperbolic sine function and the average activation energies for high Mn‐steel, V‐bearing steel and Nb‐bearing steel are obtained 495, 510, and 433 kJ mol−1. The peak stress‐temperature plots show the higher peak stress for Nb bearing steel due to finer initial grains and the presence of NbC precipitates in microstructure. Microstructure results show that DRX as necklace structure is the main mechanism of work softening during process for steels whiles the start of DRX for Nb‐bearing steel is occurred at lower strains than other steels. In this research, the hot deformation behavior and dynamic recrystallization (DRX) of strategic Nb and V‐bearing high‐Mn steels are investigated at temperature range of 850–1150 °C. Results show that DRX as necklace structure is the main mechanism of work softening during process whiles the start of DRX for Nb‐bearing steel is occurred at lower strains than other steels.