Abstract
The size and number density of precipitates formed during the early stage of precipitation of copper from Fe-1.4 at. pct Cu at 500°C was determined with the field-ion microscope (FIM). While particles of less than 50 × 10−8 cm remain invisible in the electron microscope (ETM) they are clearly resolved with the FIM; particles as small as 8 × 10−8 cm in diameter could be detected. The growth rate of the particles can be accounted for by normal bulk diffusion. At its peak strength, the alloy contains approximately 1018 particles per cu cm with an average diameter of 24 × 10−8 cm. The alloy reaches its peak strength well before precipitation is complete.
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This paper is based on a thesis submitted by S. R. GOODMAN to Carnegie-Mellon University, in partial fulfillment of the requirements of the Ph.D. degree.
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Goodman, S.R., Brenner, S.S. & Low, J.R. An FIM-atom probe study of the precipitation of copper from lron-1.4 at. pct copper. Part I: Field-ion microscopy. Metall Trans 4, 2363–2369 (1973). https://doi.org/10.1007/BF02669376
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DOI: https://doi.org/10.1007/BF02669376