Étude des cinétiques de transformation de phase d'un acier inoxydable martensitique 13%Cr-4%Ni PDF Download
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Author: Marjolaine Côté
Publisher:
ISBN:
Category :
Languages : fr
Pages : 340
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Author: Marjolaine Côté
Publisher:
ISBN:
Category :
Languages : fr
Pages : 340
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Author: Audrey Lechartier
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Les aciers inoxydables duplex présentent une combinaison intéressante entre des propriétés mécaniques élevées, une faible conductivité thermique et un coût relativement faible. Ils sont couramment employés dans le domaine du bâtiment comme rond à béton, application qui requière notamment une résistance élevée (Rm > 950 MPa) et une ductilité importante (A% > 15). Cette thèse a pour objectif d'améliorer le compromis résistance / allongement, en développant de nouvelles nuances duplex présentant une transformation martensitique induite par la plasticité (effet TRIP) aux caractéristiques contrôlées. L'optimisation de ce compromis a nécessité en particulier une compréhension détaillée des mécanismes de transformation et de déformation plastique associés à chaque phase : la ferrite (BCC), l'austénite (FCC) et la martensite (BCC).L'influence de la transformation martensitique sur le comportement mécanique est étudiée pour quatre alliages duplex de stabilité variable de la phase austénitique en fonction de leur composition chimique. L'influence d'une microstructure multiphasée sur la cinétique de transformation est déterminée grâce à l'élaboration de trois nuances modèles représentant respectivement une nuance duplex et es deux compositions représentatives de ses constituants austénite et ferrite. L'utilisation de plusieurs techniques de caractérisation à différentes échelles a permis de décrire à la fois les mécanismes de transformation de phase et leur cinétique en fonction de la déformation, donnant ainsi accès à leur influence sur le comportement mécanique. L'étude des champs cinématiques a mis en évidence l'impact de la phase martensitique sur la répartition des déformations dans la microstructure multi-phasée. Finalement l'utilisation d'un modèle mécanique prenant en compte explicitement la transformation martensitique a permis de reproduire le comportement mécanique d'un alliage duplex.
Author: Erich Folkhard
Publisher: Springer Science & Business Media
ISBN: 3709189659
Category : Technology & Engineering
Languages : en
Pages : 289
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Book Description
When considering the operational performance of stainless steel weldments the most important points to consider are corrosion resistance, weld metal mechanical properties and the integrity ofthe weldedjoint. Mechanical and corrosion resistance properties are greatly influenced by the metallurgical processes that occur during welding or during heat treatment of welded components. This book is aimed, there fore, at providing information on the metallurgical problems that may be encountered during stainless steel welding. In this way we aim to help overcome a certain degree of insecurity that is often encountered in welding shops engaged in the welding of stainless steels and is often the cause of welding problems which may in some instances lead to the premature failure of the welded component. The metallurgical processes that occur during the welding of stainless steel are of a highly intricate nature. The present book focuses in particular on the signif icance of constitution diagrams, on the processes occurring during the solidification of weld metal and on the recrystallization and precipitation phenomena which take place in the area of the welds. There are specific chapters covering the hot cracking resistance during welding and the practical welding of a number of different stainless steel grades. In addition, recommendations are given as to the most suitable procedures to be followed in order to obtain maximum corrosion resistance and mechanical properties from the weldments.
Author: V. G. Behal
Publisher: ASTM International
ISBN: 9780803107403
Category : Technology & Engineering
Languages : en
Pages : 466
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Author: John C. Lippold
Publisher:
ISBN: 9788126529476
Category :
Languages : en
Pages : 376
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Book Description
Market_Desc: · Professional engineers, technicians, scientists, etc. working in industries where stainless steels are used for construction. This includes the power generation, energy, petrochemical, dairy, medical, electronic, defense, and construction industries.· Advanced undergraduate and graduate level students. Special Features: · Emphasizes solid fundamental underpinnings of the metallurgical principles that govern microstructure evolution and property develpment in welded stainless steels.· Presents many practical examples that demonstrate the application of fundamental metallurgical principles.· Greatly expands and updates what is currently available in other texts and handbooks in the subject matter. About The Book: This book describes the fundamental metallurgical principles that control microstructure and properties of welded stainless steels. It also serves as a practical how to guide that will allow engineers to select the proper alloys, filler metals, heat treatments, and welding conditions to insure that failures are avoided during fabrication and service. This book provides state of the art information on the topic and greatly expands and update what is currently available in other texts and handbooks.
Author: Zhili Feng
Publisher: CRC Press
ISBN: 9780849334672
Category : Technology & Engineering
Languages : en
Pages : 372
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Book Description
As a fabrication technology, welding presents a number of technical challenges to the designer, manufacturer, and end-user of the welded structures. Both weld residual stress and distortion can significantly impair the performance and reliability of the welded structures. They must be properly dealt with during design, fabrication, and in-service use of the welded structures. There have been many significant and exciting developments on the subject in the past ten to fifteen years. Measurement techniques have been improved significantly. More importantly, the development of computational welding mechanics methods has been phenomenal. The progresses in the last decade or so have not only greatly expanded our fundamental understanding of the processes and mechanisms of residual stress and distortion during welding, but also have provided powerful tools to quantitatively determine the detailed residual stress and distortion information for a given welded structure. New techniques for effective residual stress and distortion mitigations and controls have also been applied in different industry sectors. Processes and Mechanisms of Welding Residual Stress and Distortion provides a comprehensive summary on the developments in the subject. It outlines theoretical treatments on heat transfer, solid mechanics and materials behavior that are essential for understanding and determining the welding residual stress and distortion. The approaches for computational methods and analysis methodology are described so that non specialists can follow them. There are chapters devoted to the discussion of various techniques for control and mitigation of residual stress and distortion, and residual stress and distortion results for various typical welded structures are provided. The second half of the book looks at case studies and practical solutions and provides insights into the techniques, challenges, limitations and future trends of each application. This book will not only be useful for advanced analysis of the subject, but also provide sufficient examples and practical solutions for welding engineers. With a panel of leading experts this authoritative book will be a valuable resource for welding engineers and designers as well as academics working in the fields of structural and mechanical engineering.
Author: Malcolm Blair
Publisher: ASM International
ISBN: 1615032428
Category : Technology & Engineering
Languages : en
Pages : 464
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Author: American Society of Mechanical Engineers
Publisher:
ISBN:
Category : Welding
Languages : en
Pages :
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Author: Valentin G. Gavriljuk
Publisher: Springer Science & Business Media
ISBN: 3662037602
Category : Technology & Engineering
Languages : en
Pages : 386
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Book Description
Basic research and new manufacturing methods have led to high nitrogen steels (HNS), a promising new group of materials for use in advanced applications in mechanical and chemical engineering. The book deals with the atomic structure, constitution, properties, manufacturing and application of martensitic, austenitic, duplex and dualphase steels of superior strength and corrosion resistance. Combining metallurgy and engineering aspects. It gives a detailed overview and presents new results on HNS. The book is intended for scientists as well as technologists, who will find stimulating information.
Author: L. A. Johnson
Publisher: Materials Research Society
ISBN: 9781558991057
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.
