Articles de périodique
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Item Improvement of Surface Properties of 30CrMo12 Steel Using Borocarbonitriding Treatment(Université des Sciences et technologie Houari Boumediene, 2023-02-01) REZALA, AichaThermochemical treatments of low alloyed steels play an essential role in improving the service life of parts under harsh conditions. Often, the treatment uses require technical significant and financial resources. For this reason, the thermochemical treatments in traditional ovens deserve consideration. In present paper, an experimental study on a 30CrMo12 steel uses the technique of borocarbonitriding process, based on the determination of the borocarbonitrided thickness layers and the kinetic constants of diffusion carried out. This nuance is used in manufacturing mechanical parts specifically solicited in fatigue as the transmission gearings in the helicopters’ rotors and the rolling of in aeronautics. Borocarbonitride treatments were performed in the temperature range of 520°C for 8h. The Borocarbonitride modified surface layer samples consist mainly of γ', ε, α, FeB, Fe2B, and Fe3C phases; according to metallographic technique analysis, it seems to be essentially a modification of the austenite matrix. High hardness values are observed in the modified layer with a sharp decrease in matrix values.Item Local and global stability indices for a riddled basin attractor of a piecewise linear map(2016-09) Roslan, Ummu Atiqah Mohd; Ashwin, PeterItem Topological pressure dimension for almost additive potentials(2016-09) Liu, Lei; Gong, Huajun; Zhou, XiaoyaoItem Reduction of a dynamics and separated angles(2016-09) Barreira, Luis; Valls, ClaudiaItem Local Gibbs–Markov–Young structures for non-invertible systems(2016-09) Li, XinItem Characterizing follower and extender set sequences(2016-09) French, ThomasItem Strong shift equivalence and strong Conley index(2016-09) Mawiong, Sainkupar Marwein; Mukerjee, Himadri KumarItem Some results on the entropy of non-autonomous dynamical systems(2016-09) Kawan, Christoph; Latushkin, YuriItem A two-step back–forth algorithm for the solution of the unsteady adjoint equations(2016-01) Papadimitriou, Dimitrios I.Item Exact recovery of sparse signals using orthogonal matching pursuit: how many iterations do we need?(2016-08) Wang, Jian; Shim, Byonghyo