کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7177031 | 1466743 | 2015 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Die angle dependency of microstructural inhomogeneity in an indirect-extruded AZ31 magnesium alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
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چکیده انگلیسی
The variation induced in the microstructural inhomogeneity of AZ31 alloy subjected to indirect extrusion was studied using tool steel dies with angles of 30°, 60° and 90°. Finite element modeling (FEM) of this extrusion process was also carried out to determine the metal flow, temperature evolution and effective strain distribution, which were then correlated with the observed microstructural changes. Although all extruded samples were found to have a bimodal microstructure consisting of equiaxed fine recrystallized (DRXed) grains and elongated coarse unDRXed grains, the inhomogeneity of their microstructural characteristics (i.e., DRX fraction and texture intensity) decreased in cross section with an increase in the die angle. The FEM analysis also demonstrated that a faster metal flow, higher temperature, and larger effective strain are generated in an alloy extruded with a 90° die angle, and that this enhances DRX behavior during extrusion and ultimately results in a homogeneously DRXed microstructure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 224, October 2015, Pages 181-188
Journal: Journal of Materials Processing Technology - Volume 224, October 2015, Pages 181-188
نویسندگان
Hui Yu, Sung Hyuk Park, Bong Sun You,