کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7992055 | 1516145 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal Effect of Cr content on the microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal](/preview/png/7992055.png)
چکیده انگلیسی
Microstructural stability and impact-toughness evolution of a Ni-Fe-based weld metal with different Cr contents was investigated during long-term thermal exposures up to 10000â¯hâ¯at 700â¯Â°C. With an increase in the Cr content from 21.1 to 23.5â¯at.%, plate-like sigma (Ï) and α-Cr phases formed during the thermal exposure. These phases were mainly located in the interdendritic areas and grew significantly as the thermal exposure time increased. The coarsening process of the γⲠphase obeyed the Lifshitz, Slyozov, and Wagner (LSW) model, and the γⲠparticles maintained a coherent relationship with the γ matrix during the thermal exposure. Carbides (M23C6) formed and coarsened at the grain boundaries, and their distribution gradually transformed from discontinuous to continuous during the thermal exposure. The evolutions of the γⲠphase and M23C6 carbides were not significantly affected by the Cr-content variation. As the thermal exposure time increased, the room-temperature impact toughness degraded significantly, and a ductile (intragranular)/brittle (mixed intergranular and intragranular) transition occurred. The degradation of impact toughness mainly occurred due to coarsening of the M23C6 carbides along the grain boundaries and the growth of plate-like phases (Ï, α-Cr) in the interdendritic areas.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 749, 15 June 2018, Pages 465-472
Journal: Journal of Alloys and Compounds - Volume 749, 15 June 2018, Pages 465-472
نویسندگان
Dong Wu, Dianzhong Li, Shanping Lu,