Coarsening behaviour of a CMSX-2 superalloy in different heat treatment conditions

GES ALEJANDRO MARIO; FORNARO OSVALDO; PALACIO HUGO A

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Elsevier Ltd.

Año: 2007 vol. 4581 p. 96 - 100

0921-5093

Nickel base-superalloys are used in applications requiring strength at high temperatures. Most of these alloys are precipitation hardened by a phase coherently precipitated in a fcc matrix. The properties and resistance to microestructural changes at high temperatures depend on factors as particle size, coarsening rate, distribution and volume fraction of the precipitate, factors that can be modified through different heat treatments. The present work describes the effect of heat treatments to produce different precipitate sizes and distribution in a CMSX-2 superalloy. Using subsequent aging treatment at constant temperature, we studied de evolution and growth of such precipitate particles and