کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1573617 | 1514685 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure evolution during high cycle fatigue in Mg-6Zn-1Mn alloy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructure evolution during high cycle fatigue in Mg-6Zn-1Mn alloy Microstructure evolution during high cycle fatigue in Mg-6Zn-1Mn alloy](/preview/png/1573617.png)
چکیده انگلیسی
Microstructure evolution during high cycle fatigue in extruded Mg-6Zn-1Mn alloy was investigated by servo-hydraulic fatigue testing machine with pull-push sinusoidal loading. The results show that in high stress cycles (cyclic stressâ¥129 MPa) high cycle fatigue tests promote deformation; however, in low stress cycles (cyclic stressâ¤125 MPa) high cycle fatigue tests make a contribution to room temperature recrystallization in Mg-6Zn-1Mn alloy. The grain refinement increased with increasing cycles. Electron Back-Scattered Diffraction (EBSD) analyses showed that dynamic recrystallization (DRX) has occurred in post-fatigued alloys, accompanied by the presence of a high number density of low-angle grain boundaries (LAGBs). LAGBs generated in the vicinity of initiation grain boundaries and subdivided coarse grains. In the specimens that subjected to higher cycles, the fraction of LAGBs decreased and high-angle grain boundaries (HAGBs) gradually increased. With the cyclic number increasing the texture intensity was significantly weakened. The DRX in post-fatigued specimens was related to Continuous DRX (CDRX) mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 658, 21 March 2016, Pages 99-108
Journal: Materials Science and Engineering: A - Volume 658, 21 March 2016, Pages 99-108
نویسندگان
Daliang Yu, Dingfei Zhang, Yuanxin Luo, Jing Sun, Junyao Xu, Fusheng Pan,