Abstract
The feature of mechanical alloying of Ni-W-Mo, Cr-Al-Ti-Ta based alloy (Ex 1 : 3.2μm, Ex 2: -325 mesh, Ex 3: 20/32 mesh) and Y2O3 powders mixed for preparing MA6000 superalloy were investigated by using screw disc type ball mill. Results were summarized as follows:
1) Mean particle size of milled powder were influenced by initial particle size of Cr-based alloy powder.
2) In either case, the lattice constants of milled powder increased with the milling time, and an ultimate value was 0.358 nm. For obtaining the same value, milling time of Ex 1 and Ex 2, 3 were of over 60 ks and 84 ks respectively.
3) This value of lattice constants corresponds to the value of identical superalloy produced by arc methods.
