Nonequilibrium segregation in an Fe-Ni-Ti alloy and a ductile-brittle-ductile transition

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Acta Materialia

DOI:https://doi.org/10.1016/1359-6454(95)00283-9· OSTI ID:230796

Heo, N H ^[1]

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1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering

Brittleness in an Fe-19.8Ni-2.7Ti ternary alloy has been investigated and a theoretical calculation performed based on a regular solution model. The alloy showed a ductile-brittle-ductile transition with aging time. This was due to the grain boundary segregation of titanium and its subsequent desegregation into the matrix, deeply related to a precipitation reaction in the matrix. The calculated results of the nonequilibrium segregation of the elements were semiquantitatively in agreement with the experimental.

• OSTI ID: 230796
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 4 Vol. 44; ISSN XZ504Y; ISSN 1359-6454
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGING
AUGER ELECTRON SPECTROSCOPY
BRITTLENESS
ELECTRIC CONDUCTIVITY
FRACTOGRAPHY
HARDNESS
IRON ALLOYS
MATHEMATICAL MODELS
MICROSTRUCTURE
NICKEL ALLOYS
SAMPLE PREPARATION
TENSILE PROPERTIES
TITANIUM ALLOYS
TRANSMISSION ELECTRON MICROSCOPY