کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7971525 1514608 2018 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the microstructure control of the bendability of advanced high strength steels
ترجمه فارسی عنوان
در کنترل ریزساختار اتصالات فولادهای پیشرفته با مقاومت بالا
کلمات کلیدی
فولاد دو مرحله ای، فولاد فاز جامد ریز ساختار، خم شدن شکل گیری باند برشی، آغاز قاچاق
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The formability of newly developed steel grades is a key parameter for their successful implementation in the car body. In the present work, the influence of the microstructure on formability during air bending is studied. First- and third-generation advanced high strength steels with tensile strengths above 1000 MPa are investigated, which exhibit a broad range of microstructural constituents (ferritic bainite, bainite, martensite, and retained austenite). Interrupted bending experiments are performed on two grades of dual phase and complex phase steels, respectively, in order to reveal the microscopic deformation and failure processes. The formability in hole expansion tests is determined and used as a measure for the resistance of the materials against crack formation. The macroscopic deformation behavior of the materials is taken into account by measuring the differential strain hardening exponent and performing finite element simulations of the air bending process. Advantages and disadvantages of various microstructural features are worked out, and it is explained why the first-generation dual phase steel exhibits the lowest and the third-generation complex phase steel the best formability during air bending.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 735, 26 September 2018, Pages 89-98
نویسندگان
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