On the fatigue behavior of ultrafine-grained interstitial-free steel
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Thomas Niendorf
Abstract
The present paper reports on the cyclic stress–strain response of body-centered cubic ultrafine-grained (UFG) interstitial-free (IF) steel severely plastically deformed at room temperature utilizing equal channel angular extrusion (ECAE). Low-cycle fatigue tests were conducted with various strain amplitudes and strain rates on samples obtained through different ECAE routes and number of ECAE passes in order to determine the optimum processing route(s) for improved fatigue response of this material. UFG IF steel is superior to its coarse grained counterpart under both monotonic and cyclic loading in terms of properties, such as stress ranges tolerated, strength levels attained, and the corresponding fatigue behavior. All UFG steels subjected to more than 4 ECAE passes exhibit stable cyclic stress–strain response. Moreover, it was shown that dynamic grain coarsening, which usually leads to cyclic softening in UFG materials, is not prevalent in the ECAE processed UFG IF steel. For representing the fatigue life of UFG IF steel, the parameter after Smith, Watson and Topper, which is an indication of energy dissipation per cycle, proved adequate while comparing materials obtained through different ECAE routes.
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© 2006, Carl Hanser Verlag, München
Articles in the same Issue
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- Herrn Prof. em. Dr. rer. nat. Dr.-Ing. E. h. mult. Prof. h. c. Dr. h. c. Eckard Macherauch zum 80. Geburtstag
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- Residual stresses in random-planar aluminium/Saffil® short-fibre composites deformed in different loading modes
- Thermal residual stress analysis in continuous Al2O3 fiber reinforced NiAl composites
- On the fatigue behavior of ultrafine-grained interstitial-free steel
- Laser Interference Metallurgy – using interference as a tool for micro/nano structuring
- On dynamic and static strain ageing in Cu-2at.% Mn polycrystals
- High thermal stability of mechanically-alloyed nanocrystalline Cu–Nb alloys
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- Microstructure and mechanical properties of the extruded Mg-alloys AZ31, AZ61, AZ80
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- Analysis of failure behaviour of carbon/carbon composite made by chemical vapour infiltration considering fibre, matrix and interface properties
- Cooperating twin robots form a new X-ray diffractometer for stress analysis
- Grinding-induced microstructural gradients and residual stresses in the surface layers of carbon steel and pure tungsten
- Residual-stress-induced subsurface crack nucleation in titanium alloys
- Microstructure and fatigue strength of the roller-bearing steel 100Cr6 (SAE 52100) after two-step bainitisation and combined bainitic–martensitic heat treatment
- History
- Damage tolerance: fracture mechanics in design
- Description of flow curves over wide ranges of strain rate and temperature
- Mechanismen und Modellierung der Verformung und Schädigung keramischer Faserverbundwerkstoffe
- Notifications
- Personal
Articles in the same Issue
- Contents
- Contents
- Editorial
- Herrn Prof. em. Dr. rer. nat. Dr.-Ing. E. h. mult. Prof. h. c. Dr. h. c. Eckard Macherauch zum 80. Geburtstag
- Basic
- Stability of residual stresses in longitudinally and transversely deep rolled sintered iron under quasistatic and cyclic loading
- Residual stresses in random-planar aluminium/Saffil® short-fibre composites deformed in different loading modes
- Thermal residual stress analysis in continuous Al2O3 fiber reinforced NiAl composites
- On the fatigue behavior of ultrafine-grained interstitial-free steel
- Laser Interference Metallurgy – using interference as a tool for micro/nano structuring
- On dynamic and static strain ageing in Cu-2at.% Mn polycrystals
- High thermal stability of mechanically-alloyed nanocrystalline Cu–Nb alloys
- Possibilities and limits in thermohydrogen processing of beta titanium alloy Timetal®10-2-3
- Applied
- Cube textured tapes for use in YBa2Cu3O7–δ-coated conductor applications
- Cavitation erosion of advanced ceramics in water
- Influence of tension–compression loading history on plastic deformation of Mg wrought alloy AZ31
- Microstructure and mechanical properties of the extruded Mg-alloys AZ31, AZ61, AZ80
- Mechanical properties and microstructural changes of ultrafine-grained AA6063T6 during high-cycle fatigue
- Analysis of failure behaviour of carbon/carbon composite made by chemical vapour infiltration considering fibre, matrix and interface properties
- Cooperating twin robots form a new X-ray diffractometer for stress analysis
- Grinding-induced microstructural gradients and residual stresses in the surface layers of carbon steel and pure tungsten
- Residual-stress-induced subsurface crack nucleation in titanium alloys
- Microstructure and fatigue strength of the roller-bearing steel 100Cr6 (SAE 52100) after two-step bainitisation and combined bainitic–martensitic heat treatment
- History
- Damage tolerance: fracture mechanics in design
- Description of flow curves over wide ranges of strain rate and temperature
- Mechanismen und Modellierung der Verformung und Schädigung keramischer Faserverbundwerkstoffe
- Notifications
- Personal