High work-hardening effect of the pure NiAl intermetallic compound fabricated by the combustion synthesis and hot pressing technique

The pure NiAl intermetallic compound was fabricated by the combustion synthesis and hot pressing technique. Microstructure examination showed that the NiAl intermetallic compound contained fine grains. Analysis of the X-ray diffraction and the HRTEM studies showed that the phase in the intermetallic...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2011-09, Vol.65 (17), p.2604-2606
Main Authors: Zhao, H.L., Qiu, F., Jin, S.B., Jiang, Q.C.
Format: Article
Language:English
Subjects:
Aluminides
combustion
Combustion synthesis
Deformation and fracture
Hot pressing
Intermetallic compounds
Intermetallics
Mechanical property
mechanical stress
Microstructure
NiAl intermetallic compound
Nickel aluminides
Nickel base alloys
Nickel compounds
X-ray diffraction
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 pure NiAl intermetallic compound was fabricated by the combustion synthesis and hot pressing technique. Microstructure examination showed that the NiAl intermetallic compound contained fine grains. Analysis of the X-ray diffraction and the HRTEM studies showed that the phase in the intermetallics was the only NiAl phase. The NiAl showed prominent compression properties. The true ultimate compression strength and the fracture strain of the NiAl are 1002 − 94 + 72 MPa and 21.6 − 1.8 + 1.8 %, respectively. The work-hardening capacity ( H c) is 1.40 − 0.07 + 0.09 and the Vickers micro-hardness is 360 − 19 + 15 HV. The finer grains, the high density dislocation and the seriously distorted lattices in the matrix, and the intense interactions between dislocations contribute to the prominent compression properties.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2011.05.091