Evolution of precipitate coarsening reaction in a nanostructured Fe-Ni-Mn maraging alloy

S. Hossein Nedjad, M. Nili-Ahmadabadi, Tadashi Furuhara, T. Maki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Fe-Ni-Mn maraging alloys show discontinuous coarsening of fct θ-NiMn precipitates along prior austenite grain boundaries (PAGBs) during isothermal aging. Heavy cold rolling of a solution annealed Fe-10Ni-7Mn (wt. %) maraging alloy and subsequent aging treatment at 773 K led to the formation of a nanostructured material. Hardness measurement and transmission electron microscopy were used to study the aging behaviour and microstructural evolution of the nanostructured alloy. At the early stage of aging, an ultrafine grained structure was observed with fine matrix precipitates. However, at later stages of aging, severe coarsening of precipitates was found. At that stage, a lamellar microstructure composed of finely precipitated ferrite laths and ultrafine ferrite grains were identified. Coarse fct θ-NiMn precipitates were identified at the ultrafine ferritic grain boundaries. Development of the coarsening reaction was found to increase the ultrafine grained ferritic regions with prolonged aging.

Original languageEnglish
Title of host publicationHigh Pressure Technology of Nanomaterials - 6th High Pressure School Proceedings of Symposium I European Materials Research Society Fall Meeting
PublisherTrans Tech Publications Ltd
Pages159-164
Number of pages6
ISBN (Print)3908451221, 9783908451228
DOIs
Publication statusPublished - 2006 Jan 1
Event6th High Pressure School- Symposium I of the E-MRS Fall Meeting 2005 - Warsaw, Poland
Duration: 2005 Sep 52005 Sep 9

Publication series

NameSolid State Phenomena
Volume114
ISSN (Print)1012-0394

Other

Other6th High Pressure School- Symposium I of the E-MRS Fall Meeting 2005
Country/TerritoryPoland
CityWarsaw
Period05/9/505/9/9

Keywords

  • Coarsening
  • Cold rolling
  • Maraging
  • Nanostructure
  • Precipitation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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