کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8004560 | 1516656 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The flow behavior in as-extruded AZ31 magnesium alloy under impact loading
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
As-extruded AZ31 magnesium alloy samples were compressed at ambient temperature and strain rates of 1000-3000Â sâ1. The fracture surfaces of cracked samples, the evolution of microstructures and macrotextures were detected. The received flow curves exhibit an abnormal behavior at strain rates above 1500Â sâ1. A strain constitutive model based on strain equivalent principle was applied to analyze the flow curves of the damaged samples. The results indicate that the abnormal flow behaviors of the fractured samples are related to the increasing area of crack surfaces, and kinetic energy during dynamic crack nucleation and propagation. The initiation of the micro-crack also causes obvious flow softening in the cracked samples. The shapes of flow stresses of the intact samples are affected by twinning.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnesium and Alloys - Volume 6, Issue 2, June 2018, Pages 180-188
Journal: Journal of Magnesium and Alloys - Volume 6, Issue 2, June 2018, Pages 180-188
نویسندگان
Biwu Zhu, Xiao Liu, Chao Xie, Wenhui Liu, Changping Tang, Liwei Lu,