LONG - TERM HEAT TREATMENTS ON TI6AL4V-SICF COMPOSITE PART II - MECHANICAL CHARACTERISATION

Deodati1, R.Donnini1, R. Montanari1, C. Testani2, T. Valente3 1 Dip. di Ing Mecc., Università di Roma “Tor Vergata”, Via del Politecnico 1, 00133 Roma; 2 Centro Sviluppo Materiali SpA, Via di Castel Romano 100, 00128 Roma, 3 Dipartimento ICMA, Università di Roma , La Sapienza, Via Eudossiana 18, 00184 Roma; Referee : M. Tului, D.Pocci Congress: Int Conference “Structural Metals and Alloys” Como 22-27/06/08 Paper presented to: Material Science Forum

ABSTRACT

Ti6Al4V-SiCf composite, manufactured by Hot Isostatic Pressing (HIP) at Centro Sviluppo Materiali, has been submitted to long-term heat treatments (up to 1000 hours) at 400 and 600°C. The mechanical properties of the material, in as-fabricated condition and after heat treatments, have been investigated by instrumented indentation (FIMEC), dynamic modulus, tensile and fatigue tests. For comparison some experiments have been carried out also on the monolithic Ti6Al4V alloy. Results show that heat treatments, also the most severe examined here, do not produce remarkable variations of mechanical characteristics. In agreement with the microstructure examinations presented in part I, this behaviour, quite promising for future aeronautical applications, can be primarily ascribed to the stability of fibre-matrix interface

© 2014 - Centro Sviluppo Materiali S.p.A. Via di Castel Romano, 100 - 00128 - Rome - ITALY
Ph. +39 06 50551 - Fax. +39 06 5055204 - Share Capital 1.050.000 Euro Fully Paid-Up
Registro Imprese di Roma CF 00477510580 R.E.A. di Roma 269973 - PI 00903541001