Journal
PHILOSOPHICAL MAGAZINE
Volume 100, Issue 11, Pages 1476-1498Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2020.1726524
Keywords
Aluminium alloy; wrap-bend test; deformation band; fracture mechanism
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada [APCPJ 441668-12]
- Engineering Research Council -Industrial Research Chair (NSERC-IRC) [IRCPJ-503185-2016]
- Natural Resources Canada
- General Motors of Canada
- Hydro Aluminium Rolled Products GmbH, Germany
- CanmetMATERIALS
Ask authors/readers for more resources
In the present study, the fracture behaviour of AA6016 alloy was investigated during bending deformation. Wrap-bend tests were conducted and the material was subjected to different bend angles to study crack propagation. The average grain size of the as-received material is approximately 45 mu m. The aspect ratio of the grains was changed from 0.53 to 0.40 during bending. The presence of deformation bands was observed during bending in both tensile and compressive regions of the sample. No orientation correlation was observed between the deformation band and its corresponding parent grain. The Schmid factor inside the deformation bands was higher than that of the parent grain, which indicates that the deformation bands accommodate strain during bending. The crystallographic texture evolved significantly during bending deformation. The strength of cube texture component decreases with increasing bend angle and new texture components formed during bending. These new texture components favour either single slip or duplex slip. A mixture of intra-granular and inter-granular fracture occurs during bending. It is observed that inter-granular crack propagation is predominantly favoured along high-angle boundaries, and grain boundary de-cohesion occurs in regions where the misorientation angle is greater than 40 degrees. The formation of deformation-induced coincidence lattice site (CSL) boundaries is also observed during bending and it is shown that the volume fraction of CSL boundaries of sigma 3 type increases with increasing bend angle. The current study shows that the formation of deformation-induced CSL boundaries of sigma 3 type in AA6016 alloy can improve its inherent resistance to crack propagation during bending.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available