Stress distribution at diffusion-bonded interface of Fe_3Al with Cr18-Ni8 steel  

作　　者：王娟 李亚江 夏春智 

机构地区：[1]Key Laboratory of Liquid Structure and Heredity of Materials,Ministry of Education,Shandong University

出　　处：《China Welding》2008年第3期46-50,共5页中国焊接（英文版）

基　　金：the Doctoral Foundation of Shandong Province (2006BS04004);National Natural Science Foundation of China (50375088)

摘　　要：Fe3Al and Crl8-Ni8 steel were bonded in vacuum and an interface was formed between Fe3Al and Crl8-Ni8 steel. Stress distribution at the diffusion-bonded interface was researched by numerical simulation and finite element method （FEM）. The results indicated that the peak stress appeared at the interface near Cr18-Ni8 steel side. This is the key factor to induce crack at this position. With the enhancement of heating temperature, the peak stress at the bonded interface increases. When the temperature is 1 100 22, the peak stress is up to 65.9 MPa, which is bigger than that at 1 000 22 by 9. 4%. In addition, the peak stress becomes bigger with the increase of the thickness of base metal from 1 mm to 8 ram. While the thickness is more than 8 ram, the peak stress varies slightly with the change of the thickness.Fe3Al and Crl8-Ni8 steel were bonded in vacuum and an interface was formed between Fe3Al and Crl8-Ni8 steel. Stress distribution at the diffusion-bonded interface was researched by numerical simulation and finite element method （FEM）. The results indicated that the peak stress appeared at the interface near Cr18-Ni8 steel side. This is the key factor to induce crack at this position. With the enhancement of heating temperature, the peak stress at the bonded interface increases. When the temperature is 1 100 22, the peak stress is up to 65.9 MPa, which is bigger than that at 1 000 22 by 9. 4%. In addition, the peak stress becomes bigger with the increase of the thickness of base metal from 1 mm to 8 ram. While the thickness is more than 8 ram, the peak stress varies slightly with the change of the thickness.

关 键 词：STRESS INTERFACE Fe3Al intermetallic compound diffusion bonding 

分 类 号：TG142.15[一般工业技术—材料科学与工程]