Creep Behaviour of Co-Based Amorphous Alloys

Structural Anisotropy of Amorphous Alloys Induced by Mechanical Creep Deformation

TEM INVESTIGATIONS OF WC-Co ALLOYS AFTER CREEP EXPERIMENTS

Carbide tungsten cobalt alloys were deformed in compression or in three point bending in a temperature range 1000-1350°C and in a stress domain 30-1000MPa. In these conditions, the stress exponent n of WC-CO alloys is a function of only the cobalt volurnic ratio and tends tow rds n = 1 for pure B carbide. The apparent activation energy is 550 kj mole. T.E.M. investigations on pure carbide defor...

High pressure magnetic behaviour of amorphous YxNi1-x alloys

High pressure magnetization and Curie temperature measurements have been performed on several amorphous Y,Ni,-, alloys. The results seem to indicate that ferromagnetism disappears in a rather inhomogeneous way.

Thermal-cycling creep of g-TiAl-based alloys

In two-phase TiAl-based alloys, the coexisting 2 and phases exhibit a thermal expansion mismatch, so that increased creep rates during thermal cycling may be expected. Creep deformation of two g-TiAl-based alloys was investigated during thermal cycles between 900 and 300 or 350 C with applied tensile stresses of 32.5 or 37.0 MPa. Measured thermal cycling creep rates were compared with isotherma...

Effect of grain-structure topology in modelling aggregate irradiation creep behaviour of two-phase alloys

The two-phase alloy Zr–2.5Nb, a high-strength alloy for nuclear applications, has a grain structure in which the hcp a-phase is surrounded by the bcc b-phase. A satisfactory method for the macroscopic overall properties of this type of materials has yet to be developed. Based on the small volume fraction of the b-phase, some existent models of polycrystalline aggregates of Zr–2.5Nb argued to co...