کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1573119 | 1514670 | 2016 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Deformation mechanisms in a fine-grained Udimet 720LI nickel-base superalloy with high volume fractions of γⲠphases
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Deformation mechanisms in a fine-grained Udimet 720LI nickel-base superalloy with high volume fractions of γⲠphases Deformation mechanisms in a fine-grained Udimet 720LI nickel-base superalloy with high volume fractions of γⲠphases](/preview/png/1573119.png)
چکیده انگلیسی
Hot-deformation behaviors and mechanisms below γⲠsolvus of U720LI with fine-grained microstructure and high volume fractions of γⲠphases were studied. MTS hot-compressed samples under hot-deformation parameters (Temperatures of 1040 °C, 1070 °C, 1100 °C, 1130 °C, strain rates of 0.01 sâ1, 0.1 sâ1, 0.5 sâ1 and strains of 0.11, 0.36, 0.69 and 1.2) were investigated by using multiple microstructural analysis methods, such as transmission electron microscopy (TEM), electron channeling contrast image (ECCI), et al.. Rare recovery and recrystallization were observed indicating that other deformation mechanisms might be enhanced during the deformation process. Except for the pinning effect, deformation happened within γⲠphases and also γⲠphase promoted the deformation of the matrix. When the slipping was inhibited by γⲠphases, twinning acted as a deformation mechanism in fine-grained U720LI. Due to the retardation effect of γⲠphases in the early stage of the deformation process, local grain boundary migration took effect. Once grain boundaries crossed γⲠphases, it made recrystallization by strain induced boundary motion(SIBM) easier.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 673, 15 September 2016, Pages 122-134
Journal: Materials Science and Engineering: A - Volume 673, 15 September 2016, Pages 122-134
نویسندگان
Jiayu Chen, Jianxin Dong, Maicang Zhang, Zhihao Yao,