SYMPOSIA PAPER Published: 01 January 1990

Radiation-Induced Segregation of Phosphorus in Nickel and Fe-Cr-Ni Alloys


Radiation-induced segregation of phosphorus has been studied in nickel and Fe-15Cr-Ni alloys, with nickel content varying from 15 to 70 atomic%, using accelerator based techniques and secondary ion mass spectrometry. Experiments in pure nickel demonstrated that phosphorus segregates by an interstitial mechanism. The similarity of segregation in nickel and Fe-15Cr-Ni alloys suggests that this conclusion also applies to the alloys. We have confirmed that manganese segregates by solute-vacancy exchanges. Phosphorus, manganese, and silicon segregation in the alloys was found to be strongly dependent on nickel content. The composition dependence was, however, similar for all the solutes, independent of mechanism. Segregation was a minimum for nickel contents about 45 atomic%. Possible explanations for this are discussed.

Author Information

Perks, JM
University of Oxford, Oxfordshire, England
English, CA
Radiation Effects Group, Harwell Laboratory, UKAEA, Oxfordshire, England
Jenkins, ML
University of Oxford, England
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Developed by Committee: E10
Pages: 379–395
DOI: 10.1520/STP24655S
ISBN-EB: 978-0-8031-5112-3
ISBN-13: 978-0-8031-1266-7