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Author: Benoît Poncelin
Publisher:
ISBN:
Category :
Languages : fr
Pages : 108
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Book Description
CE TRAVAIL A CONSISTE A UTILISER LE TRAITEMENT LASER POUR AMELIORER LES PROPRIETES MECANIQUES SUPERFICIELLES DE L'ALLIAGE A MEMOIRE DE FORME NITI. NOUS AVONS PROCEDE A DES TIRS LASER EN MODE CONFINE SUR DES ECHANTILLONS PREALABLEMENT RECOUVERT D'UN REVETEMENT THERMO-ABSORBANT POUR OBTENIR UNE SOLLICITATION IMPORTANTE ET ESSENTIELLEMENT MECANIQUE. L'ETUDE DU COMPORTEMENT SOUS CHOC DU NITI MASSIF A PERMIS DE METTRE EN EVIDENCE UN AMORTISSEMENT ELEVE DE L'ONDE DE CHOC DANS LES PREMIERES DIZAINES DE MICROMETRES DE SA PROPAGATION. LES PRESSIONS ATTEINTES N'ETANT PAS SUFFISANTES POUR DEFORMER PLASTIQUEMENT LE MATERIAU, NOUS AVONS MONTRE INDIRECTEMENT QUE CETTE ATTENUATION ETAIT DUE A UN CHANGEMENT DE PHASE AUSTENITE-MARTENSITE PLUTOT QU'A UN COMPORTEMENT ELASTOPLASTIQUE DE L'ALLIAGE NITI. CETTE MARTENSITE INDUITE SOUS CONTRAINTE, CONTRAIREMENT A LA MARTENSITE THERMIQUE, PERMET D'ACCROITRE LA DURETE DU MATERIAU DANS LA ZONE TRAITEE. L'AMELIORATION DE LA RESISTANCE A L'USURE SEMBLE, QUANT A ELLE, DUE A UN EFFET THERMIQUE DU CHOC LASER. LES PREMIERS ESSAIS DE DENSIFICATION PAR ONDES DE CHOC DE POUDRES DE NICKEL ET DE TITANE MONTRENT LES LIMITES DE CETTE TECHNIQUE DANS LE CAS D'UN FRITTE POLYPHASE RELATIVEMENT PEU DEFORMABLE. LA PRESENCE D'UNE POROSITE RESIDUELLE IMPORTANTE DANS LA ZONE IMPACTEE NE PERMET D'OBTENIR QU'UNE FAIBLE AUGMENTATION DES PROPRIETES MECANIQUES LOCALES
Author: Benoît Poncelin
Publisher:
ISBN:
Category :
Languages : fr
Pages : 108
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Book Description
CE TRAVAIL A CONSISTE A UTILISER LE TRAITEMENT LASER POUR AMELIORER LES PROPRIETES MECANIQUES SUPERFICIELLES DE L'ALLIAGE A MEMOIRE DE FORME NITI. NOUS AVONS PROCEDE A DES TIRS LASER EN MODE CONFINE SUR DES ECHANTILLONS PREALABLEMENT RECOUVERT D'UN REVETEMENT THERMO-ABSORBANT POUR OBTENIR UNE SOLLICITATION IMPORTANTE ET ESSENTIELLEMENT MECANIQUE. L'ETUDE DU COMPORTEMENT SOUS CHOC DU NITI MASSIF A PERMIS DE METTRE EN EVIDENCE UN AMORTISSEMENT ELEVE DE L'ONDE DE CHOC DANS LES PREMIERES DIZAINES DE MICROMETRES DE SA PROPAGATION. LES PRESSIONS ATTEINTES N'ETANT PAS SUFFISANTES POUR DEFORMER PLASTIQUEMENT LE MATERIAU, NOUS AVONS MONTRE INDIRECTEMENT QUE CETTE ATTENUATION ETAIT DUE A UN CHANGEMENT DE PHASE AUSTENITE-MARTENSITE PLUTOT QU'A UN COMPORTEMENT ELASTOPLASTIQUE DE L'ALLIAGE NITI. CETTE MARTENSITE INDUITE SOUS CONTRAINTE, CONTRAIREMENT A LA MARTENSITE THERMIQUE, PERMET D'ACCROITRE LA DURETE DU MATERIAU DANS LA ZONE TRAITEE. L'AMELIORATION DE LA RESISTANCE A L'USURE SEMBLE, QUANT A ELLE, DUE A UN EFFET THERMIQUE DU CHOC LASER. LES PREMIERS ESSAIS DE DENSIFICATION PAR ONDES DE CHOC DE POUDRES DE NICKEL ET DE TITANE MONTRENT LES LIMITES DE CETTE TECHNIQUE DANS LE CAS D'UN FRITTE POLYPHASE RELATIVEMENT PEU DEFORMABLE. LA PRESENCE D'UNE POROSITE RESIDUELLE IMPORTANTE DANS LA ZONE IMPACTEE NE PERMET D'OBTENIR QU'UNE FAIBLE AUGMENTATION DES PROPRIETES MECANIQUES LOCALES
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: John Henry Lorentz
Publisher: Historical Dictionaries of Asia, Oceania, and the Middle East
ISBN:
Category : History
Languages : en
Pages : 570
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Book Description
Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
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.
Author: Shahid Javed Burki
Publisher:
ISBN:
Category : History
Languages : en
Pages : 472
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Book Description
Pakistan is unlike most other countries in the emerging world. It is one of the two nations – the other being the state of Israel – founded on the basis of religion. Although it was created to provide a homeland for the Muslim community of British India, in its original form it was able to accommodate only about half of the people of Islamic faith who lived in the subcontinent. Pakistan’s birth in 1947 resulted in one of the largest movements of people in human history when some 14 million people left their homes, with 8 million Muslims leaving India for what is now Pakistan and 6 million Hindus and Sikhs moving in the opposite direction. This was the first large-scale incidence of ethnic cleansing the world was to witness. --
Author: Catherine Barnard
Publisher: Bloomsbury Publishing
ISBN: 184731869X
Category : Law
Languages : en
Pages : 337
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Book Description
The Cambridge Yearbook of European Legal Studies provides a forum for the scrutiny of significant issues in EU Law, the law of the European Convention on Human Rights, and Comparative Law with a 'European' dimension, and particularly those issues which have come to the fore during the year preceding publication. The contributions appearing in the collection are commissioned by the Centre for European Legal Studies (CELS) Cambridge, a research centre in the Law Faculty of the University of Cambridge specialising in European legal issues. The papers presented are at the cutting edge of the fields which they address, and reflect the views of recognised experts drawn from the University world, legal practice, and the institutions of both the EU and its Member States. Inclusion of the comparative dimension brings a fresh perspective to the study of European law, and highlights the effects of globalisation of the law more generally, and the resulting cross fertilisation of norms and ideas that has occurred among previously sovereign and separate legal orders. The Cambridge Yearbook of European Legal Studies is an invaluable resource for those wishing to keep pace with legal developments in the fast moving world of European integration. INDIVIDUAL CHAPTERS Please click on the link below to purchase individual chapters from Volume 13 through Ingenta Connect: www.ingentaconnect.com SUBSCRIPTION TO SERIES To place an annual online subscription or a print standing order through Hart Publishing please click on the link below. Please note that any customers who have a standing order for the printed volumes will now be entitled to free online access. www.hartjournals.co.uk/cyels/subs Editorial Advisory Board: Albertina Albors-Llorens, John Bell, Alan Dashwood, Simon Deakin, David Feldman, Richard Fentiman, Angus Johnston, John Spencer Founding Editors: Alan Dashwood and Angela Ward Ius Commune Prize 2012 Alexandre Saydé wrote Chapter 15 in this volume entitled: 'One Law, Two Competitions: An Enquiry into the Contradictions of Free Movement Law' and we are delighted to announce that he has been awarded the Ius Commune Prize 2012.
Author: John E Tedstrom
Publisher: Routledge
ISBN: 9780367303211
Category :
Languages : en
Pages : 239
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Book Description
This book highlights that Soviet economic planners and politicians must come to recognize the need to make fundamental changes, not simply incremental refinements, in the failing Soviet system. It examines the dynamics of the process of perestroika and the complexity of individual economic issues.
Author: D H Lawrence
Publisher: Independently Published
ISBN:
Category :
Languages : en
Pages : 100
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Book Description
"The Ladybird is a long tale or novella by D. H. Lawrence.It was first drafted in 1915 as a short story entitled The Thimble. Lawrence rewrote and extended it under a new title in December 1921 and sent the final version to his English agent on 9 January 1922. It was collected with two other tales, The Captain's Doll and The Fox, and the three novellas were then published in London by Martin Secker in March 1923 under the title The Ladybird and in New York by Thomas Seltzer as The Captain's Doll in April 1923."
Author: Henry Allan Ironside
Publisher:
ISBN:
Category : Bible
Languages : en
Pages : 464
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Book Description
