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Precipitate evolution in the early stages of ageing in Inconel 718 investigated using small-angle x-ray scattering
Materials Science and Applied Mathematics, Malmö University.
University West, Department of Engineering Science, Division of Manufacturing Processes. GKN Aerospace Engine Systems, Trollhättan. (PTW)ORCID iD: 0000-0001-9065-0741
Materials Science and Applied Mathematics, Malmö University.
MAX IV Laboratory, Lund University.
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2014 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 612, 202-207 p.Article in journal (Refereed) Published
Abstract [en]

Microstructural evolution during the early stages of ageing (less than one hour) in a Ni-Cr-Fe based superalloy Inconel 718 (IN718) has been investigated using Small-Angle X-ray Scattering (SAXS). The effects of precipitate kinetics on the precipitate size distribution are compared indirectly with SAXS measurements by using Vickers microhardness data. The microhardness increased after 4 min of ageing at a temperature of 760 degrees C, although the recorded SAXS data did not reveal the precipitate size distribution. This indicates that the precipitates had not evolved enough to be detected, but still a small number of precipitates increased the yield strength. After ageing the alloy for the shortest period for which data were available, 8 min, clear evidence of precipitates could be found from the SAXS data, showing that the gamma ‘’ - precipitates are about 6 nm in width and 3 nm in height. (C) 2014 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2014. Vol. 612, 202-207 p.
Keyword [en]
Nucleation; SAXS; Vickers microhardness; Nickel based superalloys; Age hardening; IN718
National Category
Materials Engineering
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-6642DOI: 10.1016/j.msea.2014.06.036ISI: 000340331300025Scopus ID: 2-s2.0-84903696081OAI: oai:DiVA.org:hv-6642DiVA: diva2:746392
Available from: 2014-09-12 Created: 2014-09-12 Last updated: 2017-12-05Bibliographically approved

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Andersson, Joel

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