Precipitation Hardening in Fe-Cu Binary and Quaternary Alloys

摘要: The behavior of precipitation hardening in two types Fe-Cu alloys has been investigated by means mechanical tests as well small angle neutron scattering measurements. integrated intensity increased first and reached a constant corresponding to the completion reaction, while particle radius monotonically with aging time, where Vickers hardness yield stress maxima, then decreased. interaction force dislocation due each precipitate was very compared Orowan mechanism. After discussion based on three possible mechanisms terms coherency strain, elastic modulus change interfacial energy, strengthening suggested be caused from strain effect. increase during is attributed growth size clusters decrease after maximum mainly related number density precipitates. It found that loss matrix greatly lowers effect, whereby structure precipitates changes bcc fcc aging.