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Tensile fracture of iron-iron aluminides composite foil.

Authors
Rawers-JC
Source
Scr Metall Mater 1994 Nov; 30(6):701-706
NIOSHTIC No.
10005048
Abstract
Because intermetallics have limited ductility, it is not possible to form composite structures that require extensive plastic deformation during processing. However, the formation of metal-intermetallic composites by Self-propagating, High-temperature, Synthesis, (SHS) reactions has the advantage that materials may be preformed into the desired final shape prior to forming the intermetallic phase. Recently, the SHS process has been used to form metal-intermetallic composites in one step processing. Metal-metal aluminide composites were formed by sandwiching Al sheets between Fe, Ni, or Ti sheets. Then, by heating the layered composition, an SHS reaction occurred at the metal-aluminum interface. The resulting exothermic reaction melts the aluminum which then reacts with the surface of the other metal producing a liquid intermetallic phase. When the metal-intermetallic system cools the resulting structure is a tightly bonded layered composite. The fracture characteristics of any material and especially of composites are important to know before applications can be found for the material. The initiation and propagation of cracks in one of the composite phases, and the propagation of cracks through the interface and through the second phase controls the eventual failure of a material. In this study, iron-iron aluminide composites formed by SHS reactions were evaluated for tensile properties and failure characteristics.
Keywords
Metallurgical-processes; Metallurgy; Metals; Aluminum-compounds; Iron-compounds; Nickel-compounds
CODEN
SCRMEX
Publication Date
19941101
Document Type
Journal Article
Fiscal Year
1995
NTIS Accession No.
NTIS Price
Identifying No.
OP 55-94
Issue of Publication
6
ISSN
0956-716X
NIOSH Division
ALRC
Source Name
Scripta Metallurgica et Materialia
State
OR
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