کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1578950 1001217 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of equal-channel angular extrusion on the mechanical and tribological properties of as-cast Zn-40Al-2Cu-2Si alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effect of equal-channel angular extrusion on the mechanical and tribological properties of as-cast Zn-40Al-2Cu-2Si alloy
چکیده انگلیسی
As-cast Zn-40Al-2Cu-2Si alloy was processed using equal-channel angular extrusion/pressing (ECAE/P) at 230 °C for four passes following route-BC. After processing, the room temperature mechanical properties (strength, ductility and impact toughness) and dry sliding wear and friction characteristics of the alloy were investigated. After four-pass ECAE, the tensile elongation to fracture of the alloy increased from 0.8% to 14.4% without a considerable decrease in its strength values. The impact toughness also increased and the as-cast brittle alloy was transformed into a ductile and tougher alloy after processing. Such enhancements are attributed to the breakage of large dendrites and fragmentation of copper-rich-phase and Si particles into finer structures, and deformation-induced homogenization of the microstructure during multi-pass ECAE. Wear resistance of ECAE-processed Zn-40Al-2Cu-2Si alloy was notably improved especially at longer sliding distances and under higher applied pressures compared to the as-cast alloy. It was also found that the ECAE processing decreased the friction coefficient of the alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issue 15, 15 June 2010, Pages 3480-3488
نویسندگان
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