کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5456759 | 1514663 | 2017 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel and simple technique for development of dual phase steels with excellent ductility
ترجمه فارسی عنوان
تکنیک جدید و ساده برای توسعه فولادهای دوگانه با قابلیت انعطاف پذیری عالی
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کلمات کلیدی
فولاد دو مرحله ای، مشخصات مکانیکی، انعطاف پذیری، سخت شدن کار،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
A new and simple approach was introduced to produce dual phase (DP) steels with excellent ductility. This technique included intercritical annealing of a cold-rolled ferrite-pearlite structure followed by water quenching to produce a ferrite-martensite duplex structure, and a subsequent short intercritical annealing at a lower temperature followed by water quenching to produce the final DP steel. It was found that the microstructure of the newly developed DP steel consisted of chain-like networked martensite in the ferrite matrix with both ultrafine and coarse grain structure. Despite the same value of ultimate tensile strength (â¼736 MPa), the uniform elongation and total elongation of the newly developed DP steel were 52% and 54% higher than those for a DP steel with the same composition and martensite volume fraction produced by conventional intercritical annealing. This new DP steel also exhibited a superior strength-elongation balance (UTSÃTE >30,000 MPa%) in comparison with commercial and thermomechanically processed DP steels. The newly developed DP steel showed two stages of work hardening based on the Kocks-Mecking approach corresponding to an initial rapid decrease of work hardening rate (θ= dÏ/dε) with stress followed by stage III hardening. This steel also exhibited larger values of work hardening exponent in the Hollomon and Ludwik equations compared with the intercritically annealed DP steel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 680, 5 January 2017, Pages 197-202
Journal: Materials Science and Engineering: A - Volume 680, 5 January 2017, Pages 197-202
نویسندگان
H. Ashrafi, M. Shamanian, R. Emadi, N. Saeidi,