Fatigue Behavior of Al-Cu Alloy Subjected to Different Numbers of ECAP Passes

The cast alloy Al‐0.63wt.% Cu was subjected to different number of equal channel angular pressing (ECAP) passes. Fatigue properties and shear bands on the surface of the alloy after fatigue were investigated. It is found that the ECAPed Al‐Cu alloy displays obvious cyclic softening. Meanwhile, multi...

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Veröffentlicht in:Advanced engineering materials 2007-10, Vol.9 (10), p.860-866
Hauptverfasser: Fang, D. R., Zhang, P., Duan, Q. Q., Wu, S. D., Zhang, Z. F., Li, J. J., Zhao, N. Q.
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container_end_page 866
container_issue 10
container_start_page 860
container_title Advanced engineering materials
container_volume 9
creator Fang, D. R.
Zhang, P.
Duan, Q. Q.
Wu, S. D.
Zhang, Z. F.
Li, J. J.
Zhao, N. Q.
description The cast alloy Al‐0.63wt.% Cu was subjected to different number of equal channel angular pressing (ECAP) passes. Fatigue properties and shear bands on the surface of the alloy after fatigue were investigated. It is found that the ECAPed Al‐Cu alloy displays obvious cyclic softening. Meanwhile, multipass ECAP treatment can decrease the shape parameter of hysteresis loops, indicative of a large Bauschinger effect. It is shown that the shear bands orient at about 45° with respect to the cyclic load axis. The current research proves that there is no one‐to‐one relationship between the shear bands induced by fatigue and the shear plane of the last ECAP extrusion, and the orientation of shear bands under fatigue should be parallel to the maximum shear stress plane of the specimen. In addition, it is noted that fatigue cracks can also occur in the area away from shear bands at low number of ECAP passes.
doi_str_mv 10.1002/adem.200700110
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source Wiley Online Library Journals Frontfile Complete
subjects Al-Cu alloys
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Equal channel angular pressing (ECAP)
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Other heat and thermomechanical treatments
Physics
Plastic deformation
Treatment of materials and its effects on microstructure and properties
title Fatigue Behavior of Al-Cu Alloy Subjected to Different Numbers of ECAP Passes
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