Creep Behaviour of Fe--Mn Binary Alloys
O. Sahin, N. Ucar
Department of Physics, Art and Science Faculty, Suleyman Demirel University, Isparta, Turkey
Creep Behaviour of Fe--Mn Binary Alloys
O. Sahin;N. Ucar
Department of Physics, Art and Science Faculty, Suleyman Demirel University, Isparta, Turkey
关键词 ：
61.66.Dk ,
61.72.Hh ,
62.20.x ,
62.20.Hg
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 10-4 s-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.
Key words ：
61.66.Dk
61.72.Hh
62.20.x
62.20.Hg
出版日期: 2006-11-01
:
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)
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2006, Vol. 23 
