Contribution à l'étude des caractéristiques du procédé de soudage TIG pulsés à moyennes fréquences PDF Download
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Author: Serge Perrault
Publisher:
ISBN:
Category :
Languages : fr
Pages : 91
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Author: Serge Perrault
Publisher:
ISBN:
Category :
Languages : fr
Pages : 91
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Book Description
Author: Driss Kerrich
Publisher:
ISBN:
Category :
Languages : fr
Pages : 258
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Book Description
Le soudage est un procede d'assemblage des structures mecaniques dont l'importance n'est plus a souligner. Pour maitriser le procede de soudage t.i.g. (tungstene-inert-gaz), il a semble utile de definir de facon tres precise les parametres qui influencent la formation du bain de soudure ainsi que sa morphologie (la penetration p, la largeur l et le rapport p/l). Ce travail est consacre au parametrage du procede de soudage t.i.g. Sans metal d'apport puis avec apport de fil chaud. L'etude metallurgique du soudage t.i.g. Avec fil chaud a permis de montrer l'effet de differents parametres sur les caracteristiques et le comportement des assemblages soudes. Les essais ont ete faits en utilisant un materiel de soudage assiste par ordinateur. Les parametres etudies sont notamment lies a la piece soudee (preparation des joints et des surfaces), a l'electrode refractaire (materiau, diametre, affutage), au metal d'apport (composition chimique, diametre, forme) et a l'arc de soudage (longueur, regime). L'etude et ses applications ont ete faites sur des eprouvettes tubulaires (gws- a42). La definition des parametres devrait permettre de prolonger cette etude essentiellement experimentale par des developpements plus theoriques sur ce probleme typique de ceux qui se posent dans les milieux diphasiques (solide-liquide) tels que le probleme de stefan.
Author: Paolo Santini
Publisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 394
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Author: U.S. Atomic Energy Commission
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
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Author: International Atomic Energy Agency
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 214
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Author: Agnes Buka
Publisher: World Scientific
ISBN: 1848167997
Category : Science
Languages : en
Pages : 299
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Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: International Atomic Energy Agency
Publisher: Bernan Press(PA)
ISBN:
Category : Nuclear power plants
Languages : en
Pages : 444
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Author:
Publisher:
ISBN:
Category : Nuclear engineering
Languages : en
Pages : 586
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Book Description
Author: I. Bezverkhyy
Publisher:
ISBN: 9783037853979
Category : Diffusion
Languages : en
Pages : 0
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Book Description
The International Conference on Diffusion in Materials (DIMAT) is the benchmark conference series for diffusion in solids. DIMAT 2011 was organized by the University of Bourgogne in association with CNRS, Dijon (France). The conference showcased new results concerning theoretical tools as well as applied research approaches. Diffusion processes affect all types of materials: nanomaterials, materials for energy, metallurgy, glasses and ceramics, but each requires its own numerical tools.Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises most of the contributions presented at DIMAT 2011: 4 plenary lectures delivered by famous high-level scientists plus 88 contributions in the form of keynote lectures, talks and posters.
Author: Jerome V. Moloney
Publisher: Springer Science & Business Media
ISBN: 9780387985817
Category : Business & Economics
Languages : en
Pages : 270
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Book Description
Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
