...Mohammad I. Albakri; Firas S. Jarrar; Marwan K. Khraisheh This paper studies the effects of interfacial friction distribution on the integrity of superplastic formed parts. For that purpose, the deformation of AA5083 superplastic aluminum alloy into a long rectangular box is investigated. The die...

... alloys wire drawing titanium dieless wire drawing superplasticity Dieless drawing is essentially a chipless/frictionless forming process, which enables a manufacturer to produce a near net finished product with just a single pass, compared with multiple passes required by the traditional...

...R. Boissière; J. J. Blandin; L. Salvo Superplastic forming (SPF) of metallic alloys allows the production of components with particularly complex shapes since in this regime, due to the predominance of grain boundary sliding (GBS), the material exhibits a high plastic stability. However, in many...

...Fadi K. Abu-Farha; Marwan K. Khraisheh Currently available models describing superplastic deformation are mostly based on uniaxial tensile test data and assume isotropic behavior, thus leading to limited predictive capabilities of material deformation and failure. In this work we present a multi...

...K. M. Liew, Fellow ASME; H. Tan; M. J. Tan In this paper, a constitutive equation for superplasticity, which is based on the microstructural mechanism of superplastic deformation taking into account the effects of deformation damage, is incorporated into the finite element method to simulate...

.... Several tests are performed using two different structural situations. In the first case, the two cylinders are made from superplastic tin-lead alloy, while in the second case, one cylinder is made from superplastic and the other from steel. Different cylindrical geometries are investigated having...

... a good correlation with the Zener-Hollomon parameter. In case of ELI grade, a mechanism of large grained superplasticity involving sliding of prior colony boundaries has been identified. However, deformation close to the transus in ELI grade causes nucleation of voids which may grow during soaking...

...S. N. Patankar; M. J. Tan Impact of alpha casing on the superplastic deformation of Ti-Al-4V was studied by applying an oxygen barrier coating onto the surface prior to superplastic forming and mechanical testing at elevated temperature. Contributed by the Materials Division of THE AMERICAN...

...Marwan K. Khraisheh Recent results (Khraisheh et al., 1995 and 1997) have indicated that superplastic materials exhibit a strong degree of anisotropy and that the plastic flow cannot be described by the isotropic von Mises flow rules. In this study, the yield potential for the model Pb-Sn...