کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9796382 | 1514946 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of severe plastic deformation on tensile properties of a cast Al-11Â mass% Si alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Up to now, investigations for the effect of the severe plastic deformation on mechanical properties of the processed materials are not enough. In the present work, tensile properties of a cast Al-11Â mass% Si alloy processed by rotary-die equal-channel angular pressing (RD-ECAP) with 4-32 passes were investigated at room temperature. Elongation to failure significantly increased with the number of RD-ECAP passes from 4 to 32. For example, the sample pressed 32 passes has 10 times higher elongation (â¼15%) than the as-cast alloy (â¼1.5%). These results show that the cast Al-11Â mass% Si alloy was transformed into a ductile alloy by RD-ECAP. Yield strength was noticeably improved by first four passes of RD-ECAP (about 40%) compared with that of the as-cast alloy. Fine-grained microstructure of the aluminum alloy matrix (about 300Â nm) and modified grain boundaries after RD-ECAP is the primary reason for exhibiting significant ductility of this alloy. Grain boundary sliding (GBS) occurred at the room temperature tensile testing in the RD-ECAPed sample. The plastic deformation and fracture mechanism of the cast Al-11Â mass% Si alloy were markedly changed by RD-ECAP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 395, Issues 1â2, 25 March 2005, Pages 70-76
Journal: Materials Science and Engineering: A - Volume 395, Issues 1â2, 25 March 2005, Pages 70-76
نویسندگان
Aibin Ma, Naobumi Saito, Makoto Takagi, Yoshinori Nishida, Hiroyuki Iwata, Kazutaka Suzuki, Ichinori Shigematsu, Akira Watazu,