Abstract
Published by Informa UK Limited, trading as Taylor & Francis Group. The Cu and NiAl nanoscale precipitation and interfacial segregation in the martensite and austenite phases within a high-strength steel were studied by atom-probe tomography (APT). In the martensite phase, APT reveals the precipitation of isolated NiAl nanoparticles and NiAl/Cu co-precipitates, indicating that NiAl nanoparticles form first in the precipitation sequence. In comparison, the austenite phase contains only Cu nanoparticles with Ni segregation at the particle/matrix interface, in which the Ni segregation reduces the Cu nanoparticle interfacial energy. In addition, Mn and C exhibit an enrichment at the martensite/austenite interface, and the mechanism for the interfacial segregation was also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 562-568 |
| Number of pages | 7 |
| Journal | Materials Research Letters |
| Volume | 5 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 15 Nov 2017 |
Keywords
- atom-probe tomography
- Cu and NiAl precipitate
- high-strength steel
- interfacial segregation
- nanoscale precipitation
ASJC Scopus subject areas
- Materials Science(all)