TY - JOUR N2 - In-situ observation of the transformation behavior of acicular ferrite in high-strength low-alloy steel using confocal laser scanning microscopy was discussed in terms of nucleation and growth. It is found that acicular ferrite nucleated at dislocations and slip bands in deformed austenite grains introduced by hot deformation in the non-recrystallization austenite region, and then proceeded to grow into an austenite grain boundary. According to an ex-situ EBSD analysis, acicular ferrite had an irregular shape morphology, finer grains with sub-grain boundaries, and higher strain values than those of polygonal ferrite. The fraction of acicular ferrite was affected by the deformation condition and increased with increasing the amount of hot deformation in the non-recrystallization austenite region. L1 - http://www.journals.pan.pl/Content/125121/PDF/AMM-2022-4-39-Hwang.pdf L2 - http://www.journals.pan.pl/Content/125121 PY - 2022 IS - No 4 EP - 1501 DO - 10.24425/amm.2022.141081 KW - acicular ferrite KW - high-strength low-alloy steel KW - confocal laser scanning microscopy (CLSM) KW - phase transformation KW - in-situ observation A1 - Lee, Sang-In A1 - Shin, Seung-Hyeok A1 - Park, Hyeonwoo A1 - Kim, Hansoo A1 - Lee, Joonho A1 - Hwang, Byoungchul PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 67 DA - 2022.11.23 T1 - In-Situ Observation of Acicular Ferrite Transformation in High-Strength Low-Alloy Steel Using Confocal Laser Scanning Microscopy SP - 1497 UR - http://www.journals.pan.pl/dlibra/publication/edition/125121 T2 - Archives of Metallurgy and Materials ER -