Our main research interest is to develop Ni-base superalloys with higher temperature capabilities for aerospace and power industries. A newly developed 3rd generation Superalloy, TMS-75, which contains 5wt% Re is easy to do heat treatment, and has stable microstructure with creep strength comparable with or even higher than CMSX-10. TMS-75 is now being evaluated in private companies inside and outside Japan. The modification is also being made by using ADP and CVM toward the 4th generation SC superalloys. Light(density=8.0-8.2) SC superalloys, high Cr SC superalloys and 3rd generation DS superalloy TMD-103 are also designed and tested in our group. Alloy Design Program (ADP) and Cluster Variation Method(CVM) are developed and used in the alloy development. The location of solute atoms witin the structures in the alloys were investigated using atom-probe field ion microscopy (APFIM) and compared with predictions by ADP and CVM.
(Last modified on 17 September 1998)