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This paper uses novel growth models composed of clusters of heterogeneous agents, and shows that limiting behavior of oneand two-parameter PoissonDirichlet models are qualitatively very different. As model sizes grow unboundedly, the coefficients of variations of extensive variables, such as the number of total clusters, and the numbers of clusters of specified sizes all approach zero in the on...

The steady-state creep rate of Ni-base metallic foams, with superalloy composition (in wt. pct) Ni7.8∼9.1Al (relative density, ρ = 2.5-2.6) and Ni-13.5∼16.6Cr-5.1∼8.9Al (ρ = 2.8∼3.0), was measured under a range of temperatures (680∼825°C) and applied stresses (0.1∼0.3 MPa), and compared with that of NiAl intermetallic foams (ρ = 5.3). The stress exponent and activation energy are within the exp...

0021-9991/$ see front matter 2012 Elsevier Inc. All rights reserved. http://dx.doi.org/10.1016/j.jcp.2012.05.027 Abbreviations: 1 M, femur 1’s medial; 2AL, femur 2’s anterior-lateral; 2PM, femur 2’s posterior-medial; 3D, three-dimensional; BMD, bone density; CT-scan, computed tomography scan; FE, finite element; MRI, magnetic resonance imaging; QCT, quantitative computed tomography; RO of inter...

Abstract This research article addresses the pitting corrosion resistance of FGM walls fabricated by Wire Arc Additive Manufacturing (WAAM). The wall is created layer-by-layer transfer molten metal in an uninterrupted manner with little heat input using CMT process. Pitting tests were carried out as per ASTM G48-11 standard on specimens extracted from Inconel 825, interfaces, and SS316L regions...