Wide-Gap Brazing of IN738 and the Bonding Strength Using Ni-Based Filler Metal Powders

Abstract:

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The microstructure and bonding strength of the wide-gap region brazed with different filler metal powder (BNi-3 and DF 4B) and various powder mixing ratios of additive powder to filler metal powder were investigated. The microstructure characterization showed that Cr borides with a blocky morphology were existed in the brazed region in both filler metal powder. The bonding strength of the wide-gap region brazed with 60 wt.% IN738 additive and 40 wt.% DF 4B powder exhibited 92% tensile strength of IN738 superalloy at room temperature. The Cracks in the wide-gap brazed region initiated at the intermetallic compound and eutectic structure, and then propagated through them.

Info:

Periodical:

Key Engineering Materials (Volumes 345-346)

Edited by:

S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim

Pages:

1449-1452

DOI:

10.4028/www.scientific.net/KEM.345-346.1449

Citation:

Y. H. Kim et al., "Wide-Gap Brazing of IN738 and the Bonding Strength Using Ni-Based Filler Metal Powders", Key Engineering Materials, Vols. 345-346, pp. 1449-1452, 2007

Online since:

August 2007

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Price:

$35.00

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