| Original Articles |
|
|
|
|
Creep Behaviour of Fe--Mn Binary Alloys |
| O. Sahin;N. Ucar |
| Department of Physics, Art and Science Faculty, Suleyman Demirel University, Isparta, Turkey |
|
| Cite this article: |
|
O. Sahin, N. Ucar 2006 Chin. Phys. Lett. 23 3037-3040 |
|
|
|
|
Abstract Tensile creep behaviour of fine-grained Fe--Mn binary alloys containing 0.42--1.21wt.% Mn has been investigated in the temperature range from room temperature to 475K under 10--50MPa. Tensile tests are carried out with a constant cross-head speed under uniaxial load at a strain rate 10-4s-1. Stress exponent and activation energy are determined to clarify deformation mechanism. The obtained variation of steady state creep rate with respect to the applied stress for Fe--Mn binary alloys exhibits two distinct regimes at about 20MPa, indicating a possible change in creep mechanism. The average stress exponent is approximately 2.2, which is a characteristic of grain boundary sliding in the alloys. The activation energy for plastic flow varies from 135 to 92kJ/mol, depending on the Mn content.
|
| Keywords:
61.66.Dk
61.72.Hh
62.20.x
62.20.Hg
|
|
|
Published: 01 November 2006
|
|
| PACS: |
61.66.Dk
|
(Alloys )
|
| |
61.72.Hh
|
(Indirect evidence of dislocations and other defects (resistivity, slip, creep, strains, internal friction, EPR, NMR, etc.))
|
| |
62.20.x
|
|
| |
62.20.Hg
|
(Creep)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
