Etude de la transformation martensitique *' dans le Cu-Zn-Al par la méthode des émissions acoustiques PDF Download
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Author: Anton Steiner
Publisher:
ISBN:
Category :
Languages : fr
Pages : 119
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Book Description
Author: Anton Steiner
Publisher:
ISBN:
Category :
Languages : fr
Pages : 119
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Book Description
Author:
Publisher:
ISBN:
Category : Cellular automata
Languages : en
Pages : 588
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Author: Pierre Charbonnier
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
AU COURS DE CE TRAVAIL, NOUS AVONS ETUDIE LES POSSIBILITES D'OBTENIR UNE GAMME DE TEMPERATURES DE TRANSFORMATION POUR UN ALLIAGE CU-ZN-AL-NI INDUSTRIEL EN JOUANT SUR LES CONDITIONS DE TRAITEMENT THERMIQUE. AINSI, UN TEMPS D'HOMOGENISATION PROLONGE EN PHASE A HAUTE TEMPERATURE EST A L'ORIGINE DE PHENOMENES SUPERFICIELS D'OXYDATION QUI CONDUISENT A UNE ELEVATION DE LA TEMPERATURE DE TRANSFORMATION MARTENSITIQUE PAR PERTE D'ELEMENTS CONSTITUTIFS DE L'ALLIAGE. LES PARAMETRES LIES A LA TREMPE ET AU REVENU CONDITIONNENT LARGEMENT LA TEMPERATURE DE TRANSITION DU FAIT DE L'OBTENTION DE DIFFERENTS ETATS ORDONNES CARACTERISES PAR MICROSCOPIE ELECTRONIQUE EN TRANSMISSION. LES EVOLUTIONS DE CES ETATS METASTABLES A LA TEMPERATURE AMBIANTE ONT ETE SUIVIES EN PARTICULIER PAR DILATOMETRIE ET PAR CALORIMETRIE ISOTHERMES ET SONT INTERPRETEES EN TERMES D'INTERACTIONS ENTRE LES LACUNES ET LA MISE EN ORDRE
Author: MARC.. MANTEL
Publisher:
ISBN:
Category :
Languages : fr
Pages : 159
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Book Description
LES ALLIAGES RICHES EN CU SONT SUJETS A DES EFFETS DE VIEILLISSEMENT A BASSE TEMPERATURE, QUI ALTERENT LES POINTS CARACTERISTIQUES DE LA TRANSFORMATION MARTENSITIQUE, AINSI QUE LA TRANSFORMATION ELLE-MEME. ON MONTRE QUE LORS DU VIEILLISSEMENT ISOTHERME DE LA MARTENSITE A UNE TEMPERATURE OU LA MOBILITE DES LACUNES EST SUFFISANTE, IL Y A CHANGEMENT D'ORDRE ATOMIQUE. CETTE REMISE EN ORDRE AUGMENTE LA TEMPERATURE DE TRANSFORMATION MARTENSITIQUE INVERSE. CET EFFET EST IRREVERSIBLE, CAR APRES LA TRANSFORMATION, LA MISE EN ORDRE EN PHASE BETA EST RAPIDE, ET ON RETOURNE VERS LA TEMPERATURE DE TRANSFORMATION CORRESPONDANT A L'ORDRE D'EQUILIBRE DE LA PHASE BETA. QUANT LA CONCENTRATION DE LACUNES DE TREMPE DANS LA MARTENSITE EST IMPORTANTE, ON OBSERVE EN PLUS DES PHENOMENES LIES A L'ORDRE UN BLOCAGE DES INTERFACES MARTENSITE/BETA PAR DES AMAS DE LACUNES. ETUDE SUR CU-28%AL-10%ZN(%AT.)
Author: Kenneth R. Threthewey
Publisher: Springer Science & Business Media
ISBN: 9401111766
Category : Science
Languages : en
Pages : 467
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Book Description
All significant studies agree that aqueous corrosion continues to cost nations dearly in almost every area of technological endeavour. Over the past ten years, microcomputers have facilitated an explosion in the power of modelling as a technique in science and engineering. In corrosion they have enabled better understanding of polarization curves, they have transformed the scope of electrochemical impedance measurements and they have placed a large range of electrochemistry at the fingertips of the corrosion scientist. This book focuses on the models, rather than the computing, which have been made possible during the past decade. Aimed at all those with an interest in corrosion and its control, the book draws together the range of new modelling strands, suggests new avenues of approach and generates further momentum for improvements to corrosion management, whether by increased understanding of atomistic processes or by control of large plant.
Author: Mohamed Haddar
Publisher: Springer Science & Business Media
ISBN: 3642371434
Category : Technology & Engineering
Languages : en
Pages : 653
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Book Description
The 5th International Congress on Design and Modeling of Mechanical Systems (CMSM) was held in Djerba, Tunisia on March 25-27, 2013 and followed four previous successful editions, which brought together international experts in the fields of design and modeling of mechanical systems, thus contributing to the exchange of information and skills and leading to a considerable progress in research among the participating teams. The fifth edition of the congress (CMSM ́2013), organized by the Unit of Mechanics, Modeling and Manufacturing (U2MP) of the National School of Engineers of Sfax, Tunisia, the Mechanical Engineering Laboratory (MBL) of the National School of Engineers of Monastir, Tunisia and the Mechanics Laboratory of Sousse (LMS) of the National School of Engineers of Sousse, Tunisia, saw a significant increase of the international participation. This edition brought together nearly 300 attendees who exposed their work on the following topics: mechatronics and robotics, dynamics of mechanical systems, fluid structure interaction and vibroacoustics, modeling and analysis of materials and structures, design and manufacturing of mechanical systems. This book is the proceedings of CMSM ́2013 and contains a careful selection of high quality contributions, which were exposed during various sessions of the congress. The original articles presented here provide an overview of recent research advancements accomplished in the field mechanical engineering.
Author: Harvey H. Hubbard
Publisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 620
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Author: Jean-Paul Kurtz
Publisher: Springer Science & Business Media
ISBN: 0306483173
Category : Technology & Engineering
Languages : en
Pages : 1520
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Book Description
I am pleased to present a work which marks a milestone in the history of public works and, more precisely, in that of permanent structures—a comprehensive dictionary of Civil Engineering terms. Since the beginning of time, Man has always tried to find a means to clear the obstacles which nature erected to displace him. With the first tree trunk thrown across a river, man sought to improve the crossing structure. After the invention of the wheel, and to satisfy his thirst for conquest (Roman ways), and comfort (aqueducts), man built bridges that became a preremptory necessity to move quickly. Thus, Man started to build wooden and masonry works. With the passing centuries, the builders became masters in the art of building masonry works. Then came the Industrial Revolution and the advent of the steel (1864), which was closely followed by the invention of the reinforced concrete (1855). The need for railways and improving the road network inspired great works of crossing such as viaducts and tunnels. The boom of the railway network and the development of the car required the construction of an increasing number of new structures. This phenomenon continues today with hundreds of structures built each year throughout the world.
Author:
Publisher:
ISBN:
Category : Railroad engineering
Languages : en
Pages : 516
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Book Description
Author: T.T. Kozlowski
Publisher: Elsevier
ISBN: 0323153011
Category : Science
Languages : en
Pages : 383
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Book Description
Water Deficits and Plant Growth, Volume III: Plant Responses and Control of Water Balance focuses on the influence of water deficits on shrinkage of plant tissues, seed germination, reproductive growth, and internal plant responses such as protoplasmic resistance to desiccation, enzymatic activity, nitrogen metabolism, hormonal relations, and mineral nutrition. This book also considers alleviation and control of water deficits in plants. This volume is organized into 10 chapters and begins with an overview of shrinkage and swelling in plant tissues and their biological implications, along with some basic aspects of seed germination and environmental factors affecting germination as well as its relation to soil moisture. The discussion then shifts to the impact of water deficits on growth of fruits at different stages of development, from flowering to fruit ripening, and the ability of the protoplasm to survive a serious reduction in water content (known as protoplasmic resistance). The following chapters explore the effects of water deficits on enzyme activity, nutrient availability, nitrogen metabolism, and hormonal distribution in plants. This book also looks at transpiration in plants and how to reduce it, and then concludes with a chapter on soil water conservation as a problem of management of available water resources in the context of agriculture. This book is a valuable resource for scientists and investigators in fields such as botany, plant pathology, forestry, and agriculture.
