کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1527531 | 1511860 | 2006 | 5 صفحه PDF | دانلود رایگان |
The existence of coarse precipitation blocked the diffusion of the atoms and caused the uneven distribution of elements at the Fe3Al/18-8 interface zone. Especially, the brittle precipitation could induce welding cracks directly. Consequently, it was one of the main factors that caused the failure of the joint. The Fe3Al/18-8 diffusion-bonded joint was re-heated and the precipitation and phase constitution of the interface were analysed by means of scanning electron microscope (SEM), energy dispersive spectrum (EDS) and X-ray diffraction (XRD). The results indicated that the precipitation became tiny and regular and distributed evenly due to re-heating. The brittle precipitation zone was liquified to become a smooth and homogeneous diffusion zone. There were no high-microhardness brittle phases such as FeAl2 and Fe2Al5 near the Fe3Al/18-8 diffusion interface after re-heating.
Journal: Materials Chemistry and Physics - Volume 100, Issues 2–3, 10 December 2006, Pages 319–323