Liquid Phase Diffusion Bonding of a Nickel-base Oxide Dispersion Strengthened Alloy MA 754

Bonding phenomena of transient liquid phase bonded joints of a Ni base single crystal superalloy

“…During the TLP bonding of Ni base single crystal superalloy (Ni-6.6Cr-12.6W-7.6Ta-4.9Al alloy) base metal using MBF-30 filler metal, the solid phase grew epitaxially from the base metal during isothermal solidification, attributed to the dissolution of recrystallized grains at the faying surfaces [6]. When Ni base single crystal (Ni-9.0Cr-10.5W-3.2Ta-5.7Al-3.2Ti-1.0Mo alloy) base material was TLP bonded using Ni-4.1B-2.9Si filler metal, the microconstituents precipitated in the bonded interlayer detrimentally influenced the mechanical properties of the joints [7]. Although several researchers have evaluated the joining characteristics of single crystal superalloys, a detailed examination of the joining process has not been carried out to-date.…”

Bonding phenomena and mechanical properties of liquid phase bonded joints in Fe‐base ODS alloy, MA956

“…This bonding method has already been applied to Ni-base ODS alloys MA6000 6 and MA754 7 ; although there are some problems, such as agglomeration of the oxide particles on the bonded interface and the loss of ODS alloy properties due to the high temperature treatment for a long duration, comparatively favourable results were obtained for the mechanical properties of the bonded joints. 7 Consequently, for this study, an insert metal of composition close to the base metal was developed for the Fe-base ODS alloy, MA956, and liquid phase diffusion welding of minimal duration was carried out; the bonding phenomenon and the mechanical properties of the bonded joints were examined.…”