Microstructure and Formation Mechnaism of Diffusion-Bonded Joint of Fe3 AITO Cr-8-Ni8 Stainless Steel

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Article | Open Access

Microstructure and Formation Mechnaism of Diffusion-Bonded Joint of Fe3 AITO Cr-8-Ni8 Stainless Steel

Wang Juan¹, Li Yajiang² and Yin Yansheng¹

¹Key lab of liquid structure and heredily of materials, Ministry of Education, School of Materials Science and Engineering, Shandong University Jinan 250061 (P.R.China)

²National Key Lab of Advanced Welding Production, Technology,Harbin Institure of Technology, Hariban 150001 (P.R. China)

DOI : http://dx.doi.org/10.13005/msri/010102

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ABSTRACT:

Mictrostructure and formation mechnaism of Fe/Ai/Cr8-Ni8 joint, which was obtained by diffusion-bonding with 1333K for 3.6ks at a pressure of 17.5 MPa, were analyzed by means of Scanning electron microsocopy (SEM), Electron probe microanalysis (EPMA) and X-ray Diffraction (XRD). The results indicated that new phase including feAl,Ni and a-Fe (Ai) solid solution were formed during the diffusion bonding of Fe3 Al intermetallic to Cr18-Ni8 steel. And the microstructure of diffusion-bonded Fe2Al/Cr18 Ni8 joint is Fe3/Al (Fe3Al+FeAl)Ni3 Al/a-fe(Al)/Cr18-Ni8.

KEYWORDS:

Microstructure; formation mechanism; Fe3 Al/Cr18-Ni8 jont; diffusion-bonding

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