Acceptable aluminum additions for minimal environmental effect in iron-aluminum alloys

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:6764739

Sikka, V K; Viswanathan, S ^[1]; Vyas, S ^[2]

---

1. Oak Ridge National Lab., TN (United States)
2. Carnegie-Mellon Univ., Pittsburgh, PA (United States)

A systematic study of iron-aluminum alloys has shown that Fe-16 at. % Al alloys are not very sensitive to environmental embrittlement. The Fe-22 and -28 at. % Al alloys are sensitive to environmental embrittlement, and the effect can be reduced by the addition of chromium and through the control of grain size by additions of zirconium and carbon. The Fe-16 at. % Al binary, and alloys based on it, yielded over 20% room-temperature (RT) elongation even after high-temperature annealing treatments at 1100[degree]C. The best values for the Fe-22 and -28 at. % Al-base alloys after similar annealing treatments were 5 and 10%, respectively. A multicomponent alloy, FAP, based on Fe- 16 at. % Al was designed, which gave an RT ductility of over 25%.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6764739
• Report Number(s): CONF-921206-10; ON: DE93006738
• Resource Relation: Conference: Materials Research Society (MRS) symposium, Boston, MA (United States), 2-6 Dec 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
EMBRITTLEMENT
CHROMIUM ALLOYS
IRON BASE ALLOYS
ANNEALING
CARBON ADDITIONS
ELONGATION
ENVIRONMENTAL EFFECTS
GRAIN SIZE
MOLYBDENUM ADDITIONS
ZIRCONIUM ADDITIONS
ALLOYS
CRYSTAL STRUCTURE
HEAT TREATMENTS
IRON ALLOYS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
SIZE
ZIRCONIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties