INTERNAL FRICTION IN SONOSTON - A HIGH DAMPING Mn/Cu-BASED ALLOY FOR MARINE PROPELLER APPLICATIONS

I. Ritchie , K. Sprungmann , M. Sahoo

Internal friction and Young's modulus changes over the range 10 to 600° C in laboratory cast samples of SONOSTON, a binary Mn-Cu alloy and samples cut from a 200-kg propeller blade cast from SONOSTON are compared. The high-damping state at room temperature in SONOSTON is very amplitude dependent, and the results are similar to those observed in ferromagnetic high-damping alloys. Besides the high-damping peak close to room temperature, there is a major relaxation peak in SONOSTON and in the binary Mn/Cu alloy at ~ 400°C. The 400°C peak is probably a Zener-type relaxation involving the stress-induced ordering of Mn atoms.

Domaines: Articles anciens

I. Ritchie, K. Sprungmann, M. Sahoo. INTERNAL FRICTION IN SONOSTON - A HIGH DAMPING Mn/Cu-BASED ALLOY FOR MARINE PROPELLER APPLICATIONS. Journal de Physique Colloques, 1985, 46 (C10), pp.C10-409-C10-412. ⟨10.1051/jphyscol:19851092⟩. ⟨jpa-00225477⟩