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In this study, the effect of Nb contents and processing parameters on dynamic recrystallization behaviour of 0.15C-0.2Si-0.5Mn low-carbon steels was investigated. Three kinds of steel specimens with different Nb contents were fabricated and then high-temperature compressive deformation test was conducted by varying reheating temperature (RT), deformation temperature (DT), and strain rate (SR). The Nb2 and Nb4 specimens containing Nb had smaller prior austenite grain size than the Nb0 specimens, presumably due to pinning effect by the formation of carbides and carbonitrides precipitates at austenite grain boundaries. The high-temperature compressive deformation test results showed that dynamic recrystallization behavior was suppressed in the specimens containing Nb as the strain rate increased and deformation temperature decreased because of pinning effect by precipitates, grain boundary dragging effects by solute atoms, although the compressive stress increased with increasing strain rate and decreasing deformation temperature.
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참고문헌 (20)
참고문헌 신청
O. Kwon / 1998 / J. Korean Inst. Met. Mater 36:1866
B. Karthik / 2016 / Effect of Aging and Oxidation on Strain Hardening Behaviour of a Nickel-free High Nitrogen Austenitic Stainless Steel / Metals and Materials International 22(3):413~423
Kun Dou / 2016 / Influence of Cooling Rate on Secondary Phase Precipitation and Proeutectoid Phase Transformation of Micro-Alloyed Steel Containing Vanadium / Metals and Materials International 22(3):349~355
N. Isasti / 2014 / Microstructural and Precipitation Characterization in Nb-Mo Microalloyed Steels: Estimation of the Contributions to the Strength / Metals and Materials International 20(5):807~817
R. Shukla / 2015 / Characterisation of Microstructure, Texture and Mechanical Properties in Ultra Low-Carbon Ti-B Microalloyed Steels / Metals and Materials International 21(1):85~95
B. Karthik / 2016 / Effect of Aging and Oxidation on Strain Hardening Behaviour of a Nickel-free High Nitrogen Austenitic Stainless Steel / Metals and Materials International 22(3):413~423
Kun Dou / 2016 / Influence of Cooling Rate on Secondary Phase Precipitation and Proeutectoid Phase Transformation of Micro-Alloyed Steel Containing Vanadium / Metals and Materials International 22(3):349~355
N. Isasti / 2014 / Microstructural and Precipitation Characterization in Nb-Mo Microalloyed Steels: Estimation of the Contributions to the Strength / Metals and Materials International 20(5):807~817
R. Shukla / 2015 / Characterisation of Microstructure, Texture and Mechanical Properties in Ultra Low-Carbon Ti-B Microalloyed Steels / Metals and Materials International 21(1):85~95
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