The structure and properties of grain boundaries in B2 ordered alloys. [FeAl; NiAl]

Technical Report · Mon Apr 04 00:00:00 EDT 1988

OSTI ID:5002343

Baker, I

During this period we have produced fine-grained alloys of FeAl and NiAl which span the respective phase fields of these materials. We have: (1) initiated mechanical testing of the FeAl alloys as a function of grain size, which confirms that the yield strength decreases with increasing deviation from stoichiometry; (2) initiated grain growth studies of the FeAl alloys, whose preliminary results suggest that grain growth is more rapid in off-stoichiometric compositions; (3) successfully prepared thin foils of NiAl alloys and iron-rich FeAl alloys for transmission electron microscopy; (4) initiated an Atom Probe Field Ion Microscope study of the grain boundary chemistry of NiAl; (5) attempted to study boundary chemistry in NiAl and studied grain boundary chemistry in Ni/sub 3/Al using Auger electron spectroscopy; and (6) performed a short oxidation study of FeAl, which shows that oxidation rate increases with increasing iron content in FeAl. 3 refs., 2 figs., 3 tabs.

• Research Organization: Dartmouth Coll., Hanover, NH (USA). Thayer School of Engineering
• DOE Contract Number: FG02-87ER45311
• OSTI ID: 5002343
• Report Number(s): DOE/ER/45311-T1; ON: DE88009890
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
GRAIN BOUNDARIES
OXIDATION
YIELD STRENGTH
IRON ALLOYS
NICKEL ALLOYS
ANNEALING
AUGER ELECTRON SPECTROSCOPY
CHEMICAL COMPOSITION
CHEMISTRY
GRAIN GROWTH
ION MICROSCOPY
MICROSTRUCTURE
PROGRESS REPORT
TRANSMISSION ELECTRON MICROSCOPY
ALLOYS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DOCUMENT TYPES
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
HEAT TREATMENTS
MECHANICAL PROPERTIES
MICROSCOPY
SPECTROSCOPY
360102* - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties