Landolt-Börnstein - Group III Condensed Matter

Atomic Defects in Metals · Co-Fe


This chapter discusses the CoFe alloy. The B2 long range ordering phase of the alloy system has been investigated in detail by resistivity measurements after electron irradiation and neutron irradiation for CoFe. The influence of the order parameter on the annealing behaviour, annealing after cold work and the influence of cold work on the annealing of irradiation defects of CoFe are shown in the figures. In addition to the binary alloy, some ternary alloys containing 2 at % of V, Mn, or Ti have been investigated. Most detailed results are reported for CoFe+2 at %V, an alloy that shows (in contrast to CoFe) an increase of ΔQ with increasing degree of order; therefore the comparison of the two alloys was considered as very helpful in the interpretation of the annealing curves. The annealing behaviour of ternary alloys is similar to the binary alloy. Isochronal annealing of ordered and disordered CoFe after 2.5 MeV-e--irradiation at 20 K is illustrated. Isochronal annealing of well annealed, cold worked and ordered CoFe alloys after irradiation with fast neutrons at 20 K are illustrated in the figure. The large changes that are observed also for the undeformed samples are attributed to changes of the order of the alloy due to the migration of thermal vacancies.

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Atomic Defects in Metals · Co-Fe
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Atomic Defects in Metals
2.6.2 Data
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Landolt-Börnstein - Group III Condensed Matter
  • H. Ullmaier
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  • P. Ehrhart
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