Chin. Phys. Lett.  2006, Vol. 23 Issue (11): 3037-3040    DOI:
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
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O. Sahin, N. Ucar 2006 Chin. Phys. Lett. 23 3037-3040
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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)  
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