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Iranian Journal of Materials Science and Engineering، جلد ۱۵، شماره ۳، صفحات ۰-۰
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عنوان انگلیسی A Study on the Nanoscale Austenite Stabilized by Q&P Heat Treatment in a Low-alloy Medium-carbon Steel
چکیده انگلیسی مقاله In this research, the objective was to investigate the stabilized retained austenite in the microstructure resulting from the Q&P heat treatment since the primary goal in Q&P is to create a microstructure consists of stabilized retained austenite and martensite. For this purpose, a low-alloy steel with 0.4wt. % carbon was treated by quench and partitioning (Q&P) process. The Q&P was conducted at different quench temperatures to obtain a considerable amount of retained austenite, while partitioning temperature and time were kept constant. Through analysis of the XRD profiles, volume percent, carbon concentration, and lattice parameters of retained austenite and martensite were calculated. At quench temperature equal to 160°C, 12vol.% austenite was stabilized to the room temperature, which was the highest amount achieved. The microstructural observations carried out on selected samples, revealed that retained austenite has a nanoscale particle size, about 200nm. Distinguishing retained austenite in the SEM micrographs became possible by utilizing SE2 signals via the difference in phases contrast. Two types of morphology, film-like and blocky type, were identified by means of TEM and TKD and a schematic model was proposed in order to explain these morphologies
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نویسندگان مقاله | R. Jafari
School of Metallurgy & Materials Engineering, Iran University of Science and Technology


| Sh. Mirdamadi
School of Metallurgy & Materials Engineering, Iran University of Science and Technology


| Sh. Kheirandish
School of Metallurgy & Materials Engineering, Iran University of Science and Technology


| HU Guim
Daejeon, Republic of Korea
نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-67-2&slc_lang=en&sid=1
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/454/article-454-677188.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده گروه فیزیکی و عملیات حرارتی
نوع مقاله منتشر شده Research paper
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