Composition and crystallography of nitride precipitates in an austenitic stainless steel containing niobium and vanadium
Authors: Karlsson, L.; Henjered, A.; Andrén, H.-O.; Nordén, H.
Source: Materials Science and Technology, Volume 1, Number 5, May 1985 , pp. 337-343(7)
Publisher: Maney Publishing
Abstract:The composition and crystallography of small nitride precipitates in a 17Cr–12.5Ni low-carbon austenitic stainless steel, containing 0·5 at.-% V + Nb and 0·4 at.-%N, have been studied using atom-probe field-ion microscopy and transmission electron microscopy. Precipitates resulting from static aging at 750°C for 8,100, or 1170 h were all found to contain N, V, Nb, and Cr, and small amounts of Fe and C. The stoichiometry, close to MX0·5, remained almost constant, but the Nb content decreased and the V and Cr contents increased with longer aging times. Electron diffraction showed that the precipitates analysed had the fcc NaCI structure, but with a superlattice with a lattice parameter (a =0·838±0.004 nm) twice as large as that of the subcell. The appearance of the long-range-ordered MX0·5 phase, its relationship to other phases, and the compositional changes occurring during aging are discussed and compared with earlier observations.
Document Type: Research Article
Publication date: 1985-05-01
Authors wishing to cite fast track papers should give the journal name and the article DOI. This will enable reference linking via CrossRef and allow forward and backward citation tracking systems to associate the fast track citation with the final journal reference.Materials Science and Technology is the successor of two previous titles, for which digitised archives are available: Metal Science (Vols. 1—17; 1967—84) and Metals Technology (Vols. 1—11; 1974—84).
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