TY - JOUR
T1 - The evaluation of quenching temperature effect on microstructural and mechanical properties of advanced high strength low carbon steel after quenching partitioning treatment
AU - Entezari, E.
AU - Mousalou, H.
AU - Yazdani, S.
AU - González-Velázquez, J. L.
AU - Szpunar, J. A.
N1 - Publisher Copyright:
© 2022 The Authors.
PY - 2021
Y1 - 2021
N2 - The influence of quenching temperature on microstructural and mechanical properties of low alloy steel of the following chemical composition: 0.26 C, 1.70 Mn, 1.42 Si, 1.10 Cr, 1.10 Ni, 0.94 Cu, 0.24 Mo, 0.1 V, Bal. Fe (Wt.%) was investigated after applying a quenching-partitioning (Q-P) treatment. The steel samples were isothermally quenched at 260, 280, and 300 °C, from the austenitizing temperature and then Q-P treated at 340 °C. After the Q-P treatment, the steel showed a multiphase microstructure containing bainite, martensite, and retained austenite. It was determined that the tensile strength and Charpy impact energy increased with a decrease in quenching temperature to 1415 MPa and 43 J, respectively. This effect was attributed to an increase in the volume fraction of austenite/martensite micro blocks that introduces a hard phase mixture strengthening factor and the presence of tempered martensite, which is strengthened by fine particle dispersion and moreover, a decrease in thickness of the bainitic-ferrite subunits that refine the microstructure. The fractographic examination of the Charpy tested specimens showed that the sample quenched at 260 °C contained finer and deeper dimples, which indicates that more energy was spent on the nucleation and growth of ductile fracture microvoids, thus increasing the toughness.
AB - The influence of quenching temperature on microstructural and mechanical properties of low alloy steel of the following chemical composition: 0.26 C, 1.70 Mn, 1.42 Si, 1.10 Cr, 1.10 Ni, 0.94 Cu, 0.24 Mo, 0.1 V, Bal. Fe (Wt.%) was investigated after applying a quenching-partitioning (Q-P) treatment. The steel samples were isothermally quenched at 260, 280, and 300 °C, from the austenitizing temperature and then Q-P treated at 340 °C. After the Q-P treatment, the steel showed a multiphase microstructure containing bainite, martensite, and retained austenite. It was determined that the tensile strength and Charpy impact energy increased with a decrease in quenching temperature to 1415 MPa and 43 J, respectively. This effect was attributed to an increase in the volume fraction of austenite/martensite micro blocks that introduces a hard phase mixture strengthening factor and the presence of tempered martensite, which is strengthened by fine particle dispersion and moreover, a decrease in thickness of the bainitic-ferrite subunits that refine the microstructure. The fractographic examination of the Charpy tested specimens showed that the sample quenched at 260 °C contained finer and deeper dimples, which indicates that more energy was spent on the nucleation and growth of ductile fracture microvoids, thus increasing the toughness.
KW - Advanced High Strength Steel
KW - Quench and temper
KW - Quenching-Partitioning treatment
KW - Strengthening mechanism
UR - http://www.scopus.com/inward/record.url?scp=85129547111&partnerID=8YFLogxK
U2 - 10.1016/j.prostr.2022.01.070
DO - 10.1016/j.prostr.2022.01.070
M3 - Artículo de la conferencia
AN - SCOPUS:85129547111
SN - 2452-3216
VL - 37
SP - 145
EP - 152
JO - Procedia Structural Integrity
JF - Procedia Structural Integrity
IS - C
T2 - 4th International Conference on Structural Integrity, ICSI 2021
Y2 - 30 August 2021 through 2 September 2021
ER -