Radiation-Induced Low-Temperature (393473 K) Intermetallic
Aging in FeNiTi (Al, Si, Zr) FCC Alloys

V. V. Sagaradze, T. M. Lapina, V. A. Shabashov, and V. L. Arbuzov

Institute of Metal Physics, Ural Division, Russian Academy of Sciences,
ul. S. Kovalevskoi 18, Ekaterinburg, 620219 Russia

Received October 22, 1996; in final form, December 18, 1996

Abstract—Possibility of decomposition of fcc solid solution to occur in N35T3-, N34Yu5-, N34S3-, and
N35Ts3-grade alloys under irradiation with 5.5-MeV electrons at 393–473 K was studied using Mössbauer
spectroscopy. Intense precipitation of Ni₃Ti and Ni₃Al intermetallic compounds was observed, whereas virtu-
ally no intermetallic aging was found in Zr- and Si-doped alloys. Studies of decomposition kinetics in the Fe–
Ni–Ti alloy revealed anomalous slowing down of the decomposition process with increasing electron fluence.

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