We are interested in the homogenization of elastic-electric coupling equation, with rapidly oscillating coefficients, in periodically perforated piezoelectric body. We justify the two first terms in the usual asymptotic development of the problem solution. For the main convergence results of this paper, we use the notion of two-scale convergence. A two-scale homogenized system is obtained as th...

We compute the large-body and the small-particle Gamma-limit of a family of energies for nematic elastomers. We work under the assumption of small deformations (linearized kinematics) and consider both compressible and incompressible materials. In the large-body asymptotics, even if we describe the local orientation of the liquid crystal molecules according to the model of perfect order (Frank ...

objective: in this study, we sought to better understand the immunoregulatory function of stem cells derived from human exfoliated deciduous teeth (shed). we studied the role of the interferon gamma (ifn-γ)-indoleamine 2,3-dioxygenase (ido)-axis in immunoregulation of shed compared to bone marrow derived mesenchymal stem cells (bmmscs) under the same conditions. materials and methods: in this c...

This paper is focused on microstructure of protective layers created by co-deposition of Al and Si on nickel base superalloys INCO 713 LC and INCO 738 LC after thermal and thermal-stress exposition and on microstructure of basic materials (substrates). The contribution also shows creep tests results for both superalloys with and without a protective layer.

Abstract Metal additive manufacturing (AM) has unlocked unique opportunities for making complex Ni-based superalloy parts with reduced material waste, development costs, and production lead times. Considering the available AM methods, powder bed fusion (PBF) processes, using either laser or electron beams as high energy sources, have potential to print geometries a level of microstructural cont...

A weak transverse static magnetic field (WTSMF, 0–0.5 T) is applied to the directional solidification process of a DD3 Ni-based SX superalloy, aiming tailor microstructure and microsegregation alloys. The mechanisms microstructural refinement distribution caused by WTSMF during are discussed. It shown that primary dendrite arm spacing rapidly reduced from 181 143 μm, average size γ′ phase signi...

The tensile creep performance of a polycrystalline Co/Ni-base superalloy with multimodal γ′ distribution has been examined at 800∘C and 300 MPa. rupture life the alloy is comparable to that RR1000 tested under similar conditions. Microstructural examination after testing revealed presence continuous precipitates M23C6 carbides along grain boundaries. Intragranularly, coarsening secondary occurr...

Nickel-based superalloys have excellent properties at high temperatures, which makes them appropriate for applications such as turbocharges and aeronautic gas turbines. MAR-M246 is a superalloy developed these kinds of applications. The objective this work was to study the total replacement Ta by Nb in atomic percentage superalloy, regarding oxidation resistance. Although both elements same rol...

We study a variable exponent model for image restoration in the case that the exponent attains the critical value one. We prove existence and Γ-convergence. The results answer an open question by Li, Li and Pi [Variable exponent functionals in image restoration, Appl. Math. Comput. 216 (2010), no. 3, 870–882].