Evidence of inherent ductility in single crystals of the ordered intermetallic compound NiAl

The initial results of an investigation of the influence of mobile dislocation density in NiAl are summarized. The ductility and fracture toughness of single crystal NiAl have been studied as a function of thermal treatments at moderate and high temperatures. The data indicate that fast cooling thro...

Full description

Saved in:
Bibliographic Details
Published in:Scripta metallurgica et materialia 1992-11, Vol.27 (10), p.1259-1263
Main Authors: Hack, J.E., Brzeski, J.M., Darolia, R.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Other mechanical properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The initial results of an investigation of the influence of mobile dislocation density in NiAl are summarized. The ductility and fracture toughness of single crystal NiAl have been studied as a function of thermal treatments at moderate and high temperatures. The data indicate that fast cooling through the temperature range 400-20 deg results in material with a tensile elongation of 7% and a fracture toughness in the range of 13-17 MPa root m. It is concluded that prior reports of brittle behavior in single crystal NiAl may be a result of strain-age embrittlement, similar to that observed in mild steels.
ISSN:0956-716X
DOI:10.1016/0956-716X(92)90067-O