Interface Microstructure of Diffusion Bonded Fe3AI/AI with Ultrafine Grain Layer
The influence of ultrafine grains produced by severe plastic deformation technology on the weldability of Fe3Al and Al dissimilar materials was investigated. An ultrafine grain layer wa s produced on Fe3Al intermetallic compound by surface mechanical attrition treatment. Then the SMATed Fe3Al was diffusion bonded with 1060A1 at 55O℃ for 90 min in the vacuum of 10-3Pa. The microstructures of surface ultrafine grain layer and transition zone at the interface of SMATed-Fe3Al/Al joint were observed by scanning electron microscopy. The grain size of surface ultrafine grains was characterized by X-ray diffractometry. The elements distribution at the interface and the phase constituents of transition zone were measured by energy disperse spectroscopy. The results showed that a deformed layer about 10-20 um wide and surface nanocrystallines about 35nm were produced after 15 min surface mechanical attrition. SMATed Fe3Al was well bonded with Al and 11-30 um wide transition zone formed. The transition zone consisted of FeAl and FeAl3 phases. The surface nanocrystallines helped the atom diffusion and the formation of diffusion bonded joint with rough surface and lower pressure.
Jiangwei Ren Dong Li Aidang Shan
College of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
1171-1175
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）