کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7984036 1514783 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of AZ61 alloys with large cross-sectional size fabricated by multi-pass ECAP
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Microstructure and mechanical properties of AZ61 alloys with large cross-sectional size fabricated by multi-pass ECAP
چکیده انگلیسی
As-cast AZ61 alloys were processed by equal-channel angular pressing (ECAP) using various process parameters. The microstructure and mechanical properties of ECAP-ed and as-cast AZ61 alloys were examined. The results showed that the microstructure of as-cast AZ61 alloys was refined well by ECAP due to dynamic recrystallization caused by ECAP. The mechanical properties of ECAP-ed AZ61 alloys were significantly improved due to the refined microstructure. Fine-grained alloys with large cross-sectional size of 58.2 mm and enhanced mechanical properties were fabricated successfully by ECAP. Extrusion temperature and processing route had an essential effect on the microstructure and mechanical properties. The highest mechanical properties including YS of (218±9) MPa, UTS of (330±10.8) MPa and elongation of (26.9±2.2)% were obtained at 290 °C using processing route BC. Forty-five-degree tensile fracture was found in ECAP-ed AZ61 alloys, which was different from the horizontal fracture occurred in as-cast AZ61 alloys. The fracture of ECAP-ed AZ61 alloys was characterized by ductile fracture due to existence of a large number of dimples as compared to brittle cleavage fracture of as-cast specimens, which was beneficial to enhance the mechanical properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 560, 10 January 2013, Pages 473-480
نویسندگان
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