Effect of temperature and strain rate on strain hardening and deformation mechanisms of high manganese austenitic steels
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Annette Bäumer
, José Antonio Jiménez and Wolfgang Bleck
Abstract
The effect of temperature and strain rate on the mechanical properties of three Fe – Mn austenitic steels with Mn contents of 20 mass.% or above has been studied by tensile tests performed at strain rates ranging from 3 × 10−3 to 200s−1 and at temperatures between −160 and +140 °C. In these steels mechanical properties and strain hardening behaviour result from the competition between different deformation mechanisms including homogeneous or inhomogeneous dislocation glide, strain induced twinning or martensite formation. Thus, the microstructure evolution during deformation was investigated. For two of the steels, a relation of the deformation mechanisms (twinning and dislocation glide) at room temperature with the grain size was found. On the other hand, for the third steel at temperatures lower than 60 °C martensite is progressively formed during deformation. For the three steels, a decreasing volume fraction of twins or martensite with increasing testing temperature was found leading consequently to a decrease in flow stress and strain hardening.
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© 2010, Carl Hanser Verlag, München
Articles in the same Issue
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- IJMR's most downloaded papers from 2008 to the present: a review
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- Microstructure of super-austenitic steels after long-term annealing
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- Investigation of the atomic structure of molten As–Se alloys using X-ray diffraction
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- Effect of cyclic heat treatment on the microstructures and mechanical properties of Ti–Si alloys
- Deleterious phases resulting from the induction bending of thick-walled super-duplex pipework
- Steady state creep in a rotating composite disc of variable thickness
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- DGM News
- DGM News
Articles in the same Issue
- Contents
- Contents
- Editorial
- IJMR's most downloaded papers from 2008 to the present: a review
- Basic
- Effect of temperature and strain rate on strain hardening and deformation mechanisms of high manganese austenitic steels
- Size effects resulting from local strain hardening; microstructural evaluation of Fe-3% Si and Cu deformed in tension and deep drawing using orientation gradient mapping (OGM)
- Microstructure of super-austenitic steels after long-term annealing
- Investigation of tensile–compressive yield asymmetry and the role of deformation twin in extruded pure magnesium
- Neutron diffraction study on liquid Al–Ni alloys
- Investigation of the atomic structure of molten As–Se alloys using X-ray diffraction
- A theoretical approach to the elastic behaviour of compact and hollow spherical particles reinforced metal-matrix composites
- Applied
- Adsorption of nucleotides on the rutile (110) surface
- Effect of cyclic heat treatment on the microstructures and mechanical properties of Ti–Si alloys
- Deleterious phases resulting from the induction bending of thick-walled super-duplex pipework
- Steady state creep in a rotating composite disc of variable thickness
- Influence of data conversion methods from torsion tests on the Garofalo equation parameters for a high nitrogen steel
- High-alloy ferritic cast irons with different graphite microstructures for exhaust manifolds and turbocharger housings
- Microstructure and mechanical properties of friction stir butt welded dissimilar pure copper/brass alloy plates
- The heat capacity measurements of CoSb3-based Skutterudite compounds
- DGM News
- DGM News