Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1599454 | Acta Metallurgica Sinica (English Letters) | 2007 | 6 Pages |
Abstract
The superplasticity and diffusion bonding of IN718 superalloy were studied in this article. The strain rate sensitivity index m was obtained at different temperatures and various initial strain rates using the tensile speed mutation method; m readied its maximum value 0.53 at an inititil strain rate of 1Ã10â4sâ1 at 1253K. The diffusion bonding parameters, including the bonding temperature T, pressure p, and time t, affected the mechanism of joints. When the bonded specimen with 25μm thick nickel foil interlayer was tensile at room temperature, the shear fracture of the joints with nickel foil interlayer took place at the IN718 part. Microstructure study was carried out with the bonded samples. The microstructure shows an excellent bonding at the interfaces. The optimum parameters for the diffusion bonding are: T=1273-1323K, p=20-30MPa, t=45-60min.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
W.B. Han, K.F. Zhang, B. Wang, D.Z. Wu,