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Influence of the restored work-hardening rate on ductility studied by X-ray computed tomography |
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| Authors: | A Hosokawa DS Wilkinson J Kang E Maire |
| Institution: | 1. National Institute for Materials Science , 1-2-1 Sengen, 305-0047 , Tsukuba , Ibaraki , Japan hosokaa@gmail.com;3. McMaster University , 1280 Main St. W., L8S 4L7 , Hamilton , ON , Canada;4. CanmetMATERIALS , 183 Longwood Rd. S., L8P 0A5 , Hamilton , ON , Canada;5. Universite de Lyon, INSA-Lyon, MATEIS CNRS UMR5510 , 7 Avenue Jean Capelle, F-69621 Villeurbanne cedex , France |
| Abstract: | Abstract Void growth and coalescence in a model material containing an artificial three-dimensional void array (the estimated local void volume fraction was 1.1%) were investigated by X-ray computed tomography (=XCT). The initially tapered cylindrical voids became elongated along the principal straining direction by some amount of tensile plastic deformation, and then the work-hardening capacity in the intervoid matrix was restored by an intermediate annealing. The annealed model material was pulled in tension all the way up to fracture to see if the existing void coalescence models can predict the void coalescence strain. |
| Keywords: | work-hardening rate ductile fracture synchrotron radiation void coalescence |