کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1578944 1001217 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of tempering on microstructure and mechanical properties of a non-quenched bainitic steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effect of tempering on microstructure and mechanical properties of a non-quenched bainitic steel
چکیده انگلیسی

The effect of tempering on the microstructure and mechanical properties of a non-quenched (NQ) bainitic steel was investigated by optical microscopy, X-ray diffractometry, scanning electronic microscope (SEM) and transmission electronic microscopy (TEM). The results show that the NQ steel which has been investigated is granular bainite composed of bainitic ferrite lath, retained austenite film and island of austenite and martensite (M/A island) before tempering. The amount of retained austenite decreases with the rise of tempering, slowly before 400 °C, sharply at 450 °C, and it is close to 0 at 600 °C. When tempered at 350 °C, this kind of NQ steel has the optimum mechanical properties because of M/A islands partly decomposition, especially for the martensite in the M/A islands. However, when tempered at 450 °C, it appears brittleness, which results from carbides distributing along prior austenite grains because M/A island is largely decomposed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issue 15, 15 June 2010, Pages 3433–3437
نویسندگان
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