Ductile fracture evaluated through micro-computed X-ray tomography

Micromechanical investigation of ductile failure in Al 5083-H116 via 3D unit cell modeling

“…Considering the microscopy (Gao et al, 2009) and X-ray tomography (Scheck and Zupan, 2011) data for Al 5083-H116, the use of f 0 ¼0.03 for the basis of our model corresponds to the assumption that all particles having a size greater than about 1 μm will nucleate voids. Bearing in mind that the particles and defects having submicron sizes are not expected to grow to become micron-sized voids under the influence of the yield stress at room temperature (Nguyen and Warner, 2012;Nair et al, 2011), the model already accounts for all the void nucleation events that could occur.…”

“…As discussed previously, the total particle volume fraction is used as the initial void volume fraction of the cell. This particle volume fraction is readily accessible though X-ray tomography and optical micrography; examples of characterization of this value can be seen in the work of Scheck and Zupan (2011) and Orlov et al (2009). The value of = f 0.03 0 for AL5083-H116 (Gao et al, 2009;Scheck and Zupan, 2011) is used in the current study.…”

“…that all particles act as voids), we are able to avoid the introduction of any tuning parameters. This assumption is motivated by the works of Edelson and Baldwin Jr (1959), Ritchie and Thompson (1985), and Scheck and Zupan (2011) who have shown that failure of an alloy can be directly linked to the population of second phase particles (which is inherently related to the nucleation rate) rather than the rate of void nucleation itself. Using this assumption, we are able to develop and test a model for ductile failure that relies on only the second phase particle volume fraction of the alloy and the constitutive response of the matrix material.…”

Analysis of Powder Binder Separation through Multiscale Computed Tomography

“…Recently, X-ray computed tomography has been widely applied to material science and engineering [9][10][11] and some researchers began to use this technology to analyze the powder-binder separation [12,13], because of its obvious advantages, including 3D and the non-destructive characterization of the spatial structure. In the previous studies, powder-binder separation was analyzed by using gray value distribution in the CT reconstructed data [14,15].…”

X-ray tomography analysis of aluminum alloy powder compaction

“…Therefore, many observation tools, such as scanning electron microscope (SEM) and optical microscope (OM), were developed to perform the characterization of the microstructure in materials. Nowadays, as a new developed technology, X-ray tomography has been applied to many fields of material science and engineering [9][10][11][12][13][14]. In Refs.…”