Cyclic deformation behaviour and microstructure of a commercial-purity zirconium

1994 ◽  
Vol 16 (6) ◽  
pp. 417-422 ◽  
Author(s):  
X LIN ◽  
G HAICHENG
Keyword(s):  
Cyclic Deformation ◽  
Deformation Behaviour ◽  
Commercial Purity

Cyclic Deformation and Fatigue Properties of Ultrafine Grain Size Materials: Current Status and Some Criteria for Improvement of the Fatigue Resistance

2000 ◽  
Vol 634 ◽  
Author(s):  
Haël Mughrabi ◽  
Heinz Werner Höppel
Keyword(s):  
Cyclic Deformation ◽  
Large Scale ◽  
Deformation Behaviour ◽  
Shear Banding ◽  
Friction Stress ◽  
Cyclic Softening ◽  
Current Status ◽  
Fatigue Properties ◽  
Ultrafine Grain ◽  
Angular Pressing

ABSTRACTIn this review, some general conclusions based on studies performed to date on fatigued materials of ultrafine grain (UFG) size produced by equal channel angular pressing (ECAP) are drawn, and open issues of current interest are defined. Important aspects addressed include the apparent discrepancy between improved fatigue strengths in Wöhler (S-N) plots as opposed to inferior fatigue strengths in Manson-Coffin plots, the clarification of the microstructural mechanisms of severe cyclic softening in conjunction with dynamic (local) grain/subgrain coarsening and damaging large-scale catastrophic shear banding. The important roles of the cyclic slip mode, the friction stress, the crystal structure and the temperature of cyclic deformation with respect to stable cyclic deformation behaviour are emphasized. Based on such considerations, criteria are formulated that must be observed, when designing ECAP-processed UFG-materials of superior fatigue strength.

Cyclic deformation behaviour of superduplex stainless steels

2001 ◽  
Vol 314 (1-2) ◽  
pp. 176-185 ◽  
Author(s):  
A. Mateo ◽  
A. Gironès ◽  
J. Keichel ◽  
L. Llanes ◽  
N. Akdut ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Cyclic Deformation ◽  
Deformation Behaviour

scholarly journals Axial-torsional fatigue and cyclic deformation of 304L stainless steel at room temperature

2019 ◽  
Vol 300 ◽  
pp. 08004
Author(s):  
Cainã Bemfica ◽  
Edgar Mamiya ◽  
Fábio Castro
Keyword(s):  
Stainless Steel ◽  
Cyclic Deformation ◽  
Room Temperature ◽  
Axial Stress ◽  
Deformation Behaviour ◽  
Hysteresis Loops ◽  
Secondary Hardening ◽  
304L Stainless Steel ◽  
Proportional Loading ◽  
Torsional Fatigue

This work investigates the axial-torsional fatigue and cyclic deformation behaviour of 304L stainless steel at room temperature. Four fully reversed strain-controlled loading paths (axial, torsional, proportional axial-torsional, and 90º out-of-phase axial-torsional) and a fully-reversed shear strain-controlled with static axial stress loading were investigated. For axial, torsional, torsional with static stress and few proportional experiments, an initial cyclic softening was followed by secondary hardening related to martensitic transformation. Secondary hardening was not observed for non-proportional loading nor for some proportional experiments. The influence of the non-stabilized cyclic deformation behaviour on the fatigue life estimates of two multiaxial critical plane fatigue models (Smith–Watson–Topper and Fatemi–Socie) was investigated. Life estimates based on the stress-strain hysteresis loops corresponding to the maximum softening and to the half-life were similar for the two models.

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