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  High strength and ductile low density austenitic FeMnAlC steels: Simplex and alloys strengthened by nanoscale ordered carbides

Gutiérrez-Urrutia, I., & Raabe, D. (2014). High strength and ductile low density austenitic FeMnAlC steels: Simplex and alloys strengthened by nanoscale ordered carbides. Materials Science and Technology, 30(9), 1099-1104. doi:10.1179/1743284714Y.0000000515.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-0F9C-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-A60A-6
Genre: Journal Article

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 Creators:
Gutiérrez-Urrutia, Ivan1, Author              
Raabe, Dierk1, Author              
Affiliations:
1Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              

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 Abstract: We introduce the alloy design concepts of high performance austenitic FeMnAlC steels, namely, Simplex and alloys strengthened by nanoscale ordered kappa-carbides. Simplex steels are characterised by an outstanding strain hardening capacity at room temperature. This is attributed to the multiple stage strain hardening behaviour associated to dislocation substructure refinement and subsequent activation of deformation twinning, which leads to a steadily increase of the strain hardening. Al additions higher that 5 wt-% promote the precipitation of nanoscale L'1(2) ordered precipitates (so called kappa-carbides) resulting in high strength (yield stress similar to 1.0 GPa) and ductile (elongation to fracture similar to 30%) steels. Novel insights into dislocation-particle interactions in a Fe-30.5Mn-8.0Al-1.2C (wt-%) steel strengthened by nanoscale kappa-carbides are discussed.

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Language(s): eng - English
 Dates: 2014-07
 Publication Status: Published in print
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Title: Materials Science and Technology
  Other : Mater. Sci. Technol.
Source Genre: Journal
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Publ. Info: London : Maney
Pages: - Volume / Issue: 30 (9) Sequence Number: - Start / End Page: 1099 - 1104 Identifier: ISSN: 0267-0836
CoNE: /journals/resource/954928563505