The effect of cyclic prestraining on the fatigue life and the microstructural evolution of fatigued copper polycrystals
Source abstract
Abstract
Abstract Almost all engineering materials undergo a mechanical pre-treatment during forming process. For this reason, the effect of prestraining on fatigue life and microstructure evolution was investigated at different stages of cycling up to failure. In this context, several specimens were tested under various plastic strain amplitudes in air and vacuum environments. The obtained results showed that the fatigue life is not affected by prestraining. In addition, microscopic analysis revealed that the characteristic dislocation microstructure of a virgin specimen fatigued at constant plastic strain amplitude is never observed after prestraining. Furthermore, the equiaxed dislocation cell structure tended to form very quickly with cumulative plastic deformation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and mechanical properties · Metal Forming Simulation Techniques · Aluminum Alloy Microstructure Properties
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References (17)
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1. Effet d’un préécrouissage ou d’un surécrouissage sur la durée de vie en fatigue de divers aciers à contrainte ou déformation imposées
2. Micro–macro investigations about the fatigue behaviour of pre-hardened 304L steel10.1016/j.ijplas.2011.06.004 ↗
3. Effect of pre-strain on the fatigue life of 7050-T7451 aluminium alloy10.1016/j.msea.2007.02.024 ↗
4. Cyclic stress–strain response of F.C.C. metalsand alloys – II Dislocation structures and mechanisms10.1016/0001-6160(67)90138-1 ↗
5. Cyclic strain-softening effects in metals
6. Cyclic stress–strain response and fatigue life of metals in low amplitude region10.1016/0025-5416(73)90125-0 ↗
7. The influence of mechanical prehistory on the cyclic stress–strain response and microstructure of single-phase metallic materials. LCF3
8. History effects in metals during constant and variable amplitude testing. I: Wavy dislocation glide behaviour10.1016/0921-5093(95)09782-1 ↗
9. Cyclic stress–strain response of F.C.C. metals and alloys – phenomenological experiments10.1016/0001-6160(67)90137-X ↗
10. Ghammouri M, Abbadi M, Mendez J. Microstructure evolution during cycling in vacuum and air environments: correlation with mechanical behaviour. Int J Fatigue, in revision.
11. Hitoshi · Metal Trans · 1979 · A10 · 1881
12. Temperature effect on the low-cycle fatigue behaviour of type 316L SS: cyclic non-stabilization and an invariable fatigue parameter10.1016/j.msea.2006.12.035 ↗
13. Effect of prior cold work on the room temperature low-cycle fatigue behaviour of AISI 304LN stainless steel10.1016/0142-1123(95)00078-X ↗
14. Investigation of subsequent viscoplastic deformation of austenic stainless steel subjected to cyclic preloading10.1016/j.ijplas.2005.03.008 ↗
15. Formulation of a new single crystal law for modeling the cyclic softening10.1016/j.mechrescom.2008.06.001 ↗
16. Rearrangement of fatigue dislocation structure in copper single crystals associated with reduction in the plastic strain amplitude10.1080/01418610208235674 ↗
17. An experimental investigation on cyclic plastic deformation and substructures of polycrystalline copper10.1016/j.ijplas.2005.02.004 ↗