کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1636388 | 1516956 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hot deformation behavior and workability of pre-extruded ZK60A magnesium alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The hot deformation behavior and workability of pre-extruded ZK60A magnesium alloy were investigated by compression tests in the temperature range of 250-450 °C and the strain rate range of 0.001-10 sâ1. The constitutive equation for the pre-extruded ZK60A alloy can be described by hyperbolic sine function. Processing maps were constructed from true strains of â0.2 to â0.8. The alloy experienced complete dynamic recrystallization (DRX) and showed good workability in the temperature range of 300-400 °C and the strain rate range of 0.01-0.001 sâ1, where hot working in pre-extruded ZK60A, such as forging, can be carried out. For large deformation to true strain of over â0.5, strain rates above 0.1 sâ1 are not recommended at all temperatures, where flow instability such as local strain concentration, twinning deformation, abnormal grain growth, micro-cracks, and shear fracture were observed. Climb-controlled dislocation creep dominates both the plastic deformation and nucleation of DRX of the pre-extruded ZK60A magnesium alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 6, June 2015, Pages 1822-1830
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 6, June 2015, Pages 1822-1830
نویسندگان
Shi-yi WANG, Lei GAO, Alan A. LUO, De-jiang LI, Xiao-qin ZENG,