کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455383 | 1514638 | 2017 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvement of microstructure, mechanical properties and hot workability of a TiAl-Nb-Mo alloy through hot extrusion
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Improvement of microstructure, mechanical properties and hot workability of a TiAl-Nb-Mo alloy through hot extrusion Improvement of microstructure, mechanical properties and hot workability of a TiAl-Nb-Mo alloy through hot extrusion](/preview/png/5455383.png)
چکیده انگلیسی
γ-TiAl alloys are excellent candidate materials for high-temperature applications, although poor hot workability limits their widespread application. In the present study, the microstructure, mechanical properties and hot workability of TiAl-Nb-Mo alloy in the as-cast and as-extruded conditions were investigated. The as-cast TiAl alloy consisted of γ/α2 lamellae, γ and β phase distributed at colony boundaries and on the lamellar interfaces. The tiny particles of Ï0 phase were formed, transformed from β phase during HIP treatment, which dissolved after hot extrusion. The TiAl alloy exhibited improved mechanical properties and excellent hot workability after hot extrusion because of grain refinement, the introduction of β phase and the disappearance of Ï0 phase. The anomalous yield stress phenomenon occurring in as-cast material disappeared in the as-extruded condition, which was ascribed to grain refinement that reduced the resistance of grain boundaries to intragranular slip at elevated temperature. The findings demonstrate the benefits of introducing small amounts of β phase to improve hot workability of TiAl-Nb-Mo alloys, particularly when followed by heat treatment to eliminate the β phase and increase the mechanical properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 705, 29 September 2017, Pages 200-209
Journal: Materials Science and Engineering: A - Volume 705, 29 September 2017, Pages 200-209
نویسندگان
Wenchen Xu, Xueze Jin, Kai Huang, Yingying Zong, Shifeng Wu, Xunmao Zhong, Fantao Kong, Debin Shan, S. Nutt,