کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5456616 1514664 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Deformation behaviors of twin roll cast Mg-Zn-X-Ca alloys for enhanced room-temperature formability
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Deformation behaviors of twin roll cast Mg-Zn-X-Ca alloys for enhanced room-temperature formability
چکیده انگلیسی
Formability and viscoplastic self-consistent simulations of Mg-4Zn-X-Ca alloys were carried out in an effort to understand the relationship between deformation behaviors and room-temperature formability. The microstructural, textural and mechanical properties of Mg-4Zn-X-Ca alloys were also investigated. All of the alloys showed a sound twin roll cast microstructure without the occurrence of inverse segregation. Annealed Z4 and ZSX400 alloys exhibited strong basal textures; however, the other Mg alloys showed weaker basal textures with splitting in the transverse direction resulting from their different types of static recrystallization. Among the Mg-4Zn-X-Ca alloys, the ZAX400 alloy exhibited a high yield strength value of 189.3 MPa and excellent formability of 7.5 mm with enhanced yield isotropy, comparable to those of Al alloys. The higher formability values of the Mg-4Zn-X-Ca alloys were closely related to the modified deformation behaviors resulting from the texture evolution. The ZX40, ZAX400, ZWX400 and ZCX400 alloys, which were more formable, had higher relative activity of the basal slip upon compression deformation, thus improving the yield isotropy. However, the Z4 and ZSX400 alloys in this study, had relatively low activity of the basal slip in compression modes, as caused by their different CRSS ratios (tension twin/basal slip).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 679, 2 January 2017, Pages 329-339
نویسندگان
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