On the effect of strain rate on the yield stress anomaly in Fe-40Al

Journal Article · Sun Jun 15 00:00:00 EDT 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(97)00036-5· OSTI ID:509206

Li, X; Baker, I ^[1]

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1. Dartmouth Coll., Hanover, NH (United States). Thayer School of Engineering

Compression tests on large-grained, low-temperature-annealed Fe-40Al at 1 {times} 10{sup {minus}6} s{sup {minus}1} and 1 {times} 10{sup {minus}1} s{sup {minus}1} were performed in order to test some predictions of the recent vacancy-hardening model for the yield stress anomaly in FeAl. It was found that at low strain rates the yield peak disappeared and at high strain rates the yield peak moved to both higher temperatures and higher stresses, both of which are in accord with the model. However, some unexpected features of the stress-temperature behavior were also observed. These will be the subject of further study.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• OSTI ID: 509206
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 12 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
COMPRESSION STRENGTH
DISLOCATIONS
EXPERIMENTAL DATA
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MATHEMATICAL MODELS
SLIP
STRAIN RATE
TEMPERATURE DEPENDENCE
YIELD STRENGTH