Coexistence of Two Cubic-Lattice Co Matrices at High Temperatures in Co-Re-Cr-Ni Alloy Studied by Neutron Diffraction

Figure 4

Micrograph of the Co-Re-23Cr-25Ni alloy showing the formation of the σ phase (a) at grain boundaries in ST condition and (b) within grains after 800°C (100 h) exposure. The EBSD phase map and EDS elemental distribution are also shown. Compositions were determined by EDS at cross marked positions in (a) and (b), and results are listed in Table 1.

(a)

(b)