Effects of Mo and Nb on Microstructure and Charpy Impact Properties of CGHAZ in HSLA Steels
نویسندگان
چکیده
In this study, the effects of Mo and Nb on microstructure Charpy impact properties coarse-grain heat affected zone (CGHAZ) in high-strength low-alloy (HSLA) steels were investigated. The high-Mo steel had a lower volume fraction acicular ferrite (AF) higher granular bainite (GB) than those low steel. CGHAZ specimen AF GB compared to low-Mo specimen. This is because, an increase lowers transformation temperature, induces formation bainitic (BF), reduces diffusion velocity carbon, thereby inhibiting ferrite. Nb-added similar that but smaller packet sizes non-Nb Compared specimens, AF, GB, BF, prior austenite grain size. forms Nb(C,N) inhibit growth, thus BF. with highest smallest average size Charpy-absorbed energy. However, articles Journal Welding Joining reported other specimens high fractions BF coarse packets showed
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ژورنال
عنوان ژورنال: Journal of welding and joining (Online)
سال: 2022
ISSN: ['2466-2100', '2466-2232']
DOI: https://doi.org/10.5781/jwj.2022.40.1.3