Measurement of bulk residual stresses in molybdenum disilicide/stainless steel joints using neutron scattering
- Los Alamos National Lab., NM (United States). Materials Science and Technology Div.
Neutron diffraction was used to measure the bulk residual strains in molybdenum disilicide (MoSi{sub 2})-316L stainless steel joints. The joints were produced by brazing disks of MoSi{sub 2} and 316L stainless steel along with an interlayer, using Cusil{trademark} as the braze. This study explored the physical parameters of the interlayer on the average phase strains in the MoSi{sub 2} and 316L stainless steel. The effect of the coefficient of thermal expansion was explored by using three different interlayer materials: niobium, nickel, and nickel-iron. The residual strains in MoSi{sub 2} decreased significantly in both radial and axial directions with increasing niobium interlayer thickness. Residual strains were relatively insensitive to changes in 500 {micro}m thick interlayer material. Finite element modeling results were corroborated by the neutron measurements on the joints allowing inferences to be drawn concerning the preference of the interlayer material. The results illustrate the importance of the ductile interlayer in the successful fabrication of MoSi{sub 2}-316L stainless steel joints.
- OSTI ID:
- 616251
- Journal Information:
- Acta Materialia, Vol. 46, Issue 6; Other Information: PBD: 23 Mar 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
USE OF A COBALT BASED METALLIC-GLASS IN JOINING MOSI2 TO STAINLESS STEEL
Durable, Impermeable Brazes for Solid Oxide Fuel Cells (Final Report)