کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1581203 1514855 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow behavior of a superplastic Zn-22% Al alloy processed by equal-channel angular pressing
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Flow behavior of a superplastic Zn-22% Al alloy processed by equal-channel angular pressing
چکیده انگلیسی
A Zn-22% Al eutectoid alloy was processed using equal-channel angular pressing (ECAP) to reduce the grain size to ∼0.8 μm. A maximum elongation of ∼2230% was recorded in tensile testing at 473 K at a strain rate of 1.0 × 10−2 s−1. The significance of grain boundary sliding was evaluated by measuring the offsets in surface marker lines for samples pulled to an elongation of 30% at three different strain rates. The highest sliding contribution was recorded under testing conditions corresponding to the maximum superplastic elongation. Detailed measurements showed that relatively high sliding offsets were recorded at the Zn-Zn and Zn-Al interfaces whereas the offsets were smaller at the Al-Al interfaces. The measurements show that grain boundary sliding is a major flow process during superplastic deformation in the Zn-22% Al alloy processed by ECAP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 503, Issues 1–2, 15 March 2009, Pages 48-51
نویسندگان
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