Influence of the - phase separation on the tensile properties of Fe-base ODS PM 2000 alloy

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Materials Science and Engineering A

DOI:https://doi.org/10.1016/j.msea.2010.08.083· OSTI ID:991178

Capdevila, C. ^[1]; Miller, Michael K ^[2]; Toda, I ^[1]; Chao, J. ^[1]

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1. CENIM-CSIC, Madrid, Spain
2. ORNL

The yield and ultimate tensile strengths of an ultrafine grained, oxide dispersion strengthened (ODS) PM 2000 alloy increased during aging at 475 C. Atom probe tomography and X-ray diffraction analysis revealed that the decrease in lattice parameter and the increases in the yield and ultimate tensile strengths were correlated with phase separation into Fe-rich {alpha} and Cr-enriched {alpha}{prime} phases. The lattice misfit between the emerging {alpha} and {alpha}{prime} domains and the resulting elastic strain, and the increment of the elastic modulus with aging time due to the corresponding decrease of lattice parameter during {alpha}-{alpha}{prime} phase separation, can be regarded as the main causes of hardening.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 991178
• Journal Information: Materials Science and Engineering A, Vol. 527, Issue 29-30; ISSN 0921-5093
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGING
ALLOYS
ATOMS
HARDENING
LATTICE PARAMETERS
OXIDES
PROBES
TENSILE PROPERTIES
TOMOGRAPHY
X-RAY DIFFRACTION