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New Advanced High Strength Steels
In recent years, significant developments have been made to increase the mechanical strength of steels in order to reduce the overall weight of structures, particularly in motor vehicles. Depending on the application, the increase in strength should not be at the expense of forming and in-use properties. The development of ultra-high strength steels requires a search for new trade-offs between these properties in order to optimize the final microstructure. New Advanced High Strength Steels analyzes the interactions between tensile mechanical properties and properties such as work hardening, anisotropy, resistance to rupture, fatigue life, corrosion resistance, crashworthiness, edge retention, hydrogen resistance and weldability. It also examines the links between the microstructural parameters of high-strength steels and the properties mentioned above. It highlights the metallurgical developments that have been necessary for the emergence of these new generations of steels. The book concludes with a look ahead to future developments in ultra-high strength steels
Hot Stamping of Ultra High-Strength Steels
Providing a comprehensive overview of hot stamping (also known as ‘press hardening’), this book examines all essential aspects of this innovative metal forming method, and explores its various uses. It investigates hot stamping from both technological and business perspectives, and outlines potential future developments. Individual chapters explore topics such as the history of hot stamping, the state of the art, materials and processes employed, and how hot stamping is currently being used in the automotive industry to create ultra-high-strength steel components. Drawing on experience and expertise gathered from academia and industry worldwide, the book offers an accessible resource for a broad readership including students, researchers, vehicle manufacturers and metal forming companies.
Advanced High Strength Sheet Steels
The book covers all types of advanced high strength steels ranging from dual-phase, TRIP. Complex phase, martensitic, TWIP steels to third generation steels, including promising candidates as carbide free bainitic steels, med Mn and Quenching & Partitioning processed steels. The author presents fundamentals of physical metallurgy of key features of structure and relationship of structure constituents with mechanical properties as well as basics of processing AHSS starting from most important features of intercritical heat treatment, with focus on critical phase transformations and influence of alloying and microalloying. This book intends to summarize the existing knowledge to show how it can be utilized for optimization and adaption of steel composition, processing, and for additional improvement of steel properties that should be recommended to engineering personal of steel designers, producers and end users of AHSS as well as to students of colleges and Universities who deal with materials for auto industry.
IUTAM Symposium on Micromechanics of Plasticity and Damage of Multiphase Materials
The IUT AM Symposium on "Micromechanics of Plasticity and Damage of Multiphase Materials" was held in Sevres, Paris, France, 29 August - 1 September 1995. The Symposium was attended by 83 persons from 18 countries. In addition 17 young French students attended the meeting. During the 4 day meeting, a total of 55 papers were presented, including 24 papers in the poster sessions. The meeting was divided into 7 oral and 3 poster sessions. The 7 oral sessions were the following: - Plasticity and Viscoplasticity I and II; - Phase transformations; - Damage I and II; - Statistical and geometrical aspects; - Cracks and interfaces. Each poster session was introduced by a Rapporteur, as follows: - Ses...
Austenite Formation and Decomposition
These proceedings compile papers from an international symposium sponsored by the ISS Product Physical Metallurgy and TMS Phase Transformations committees. These papers bring together academic and industrial experts in austenite formation and decomposition to present the field’s latest developments and cover such areas as advances in the understanding of the mechanistic, diffusional, and thermodynamic aspects of austenite formation and decomposition, as well as the ability to measure, characterize, and model these phenomena. Topics include: Effects of processing on austenite formation or decomposition Computational modeling Analytical methods for measurement of austenite formation and decomposition Characterization of microstructures Metallurgists in the field of ferrous metallurgy in both academia and industry, as well as metallurgists working in the area of phase transformations fundamentals, will find this book to be a valuable reference. From Materials Science & Technology 2003 to be held in Chicago, Illinois, November 9-12, 2003.
Le développement des aciers à très haute résistance
Au cours des dernières années, d’importants développements ont été réalisés pour accroître la résistance mécanique des aciers afin d’alléger le poids total des structures, en particulier celui des véhicules automobiles. Selon les applications visées, l’augmentation de cette caractéristique ne doit pas se faire aux dépens des propriétés de mise en forme et d’usage. Le développement d’aciers à très haute résistance nécessite la recherche de nouveaux compromis entre ces propriétés afin d’optimiser la microstructure finale. Le développement des aciers à très haute résistance analyse les interactions entre les propriétés mécaniques en traction et les pro...
Propagation rapide et arrêt des fissures dans les aciers pour gazoducs
La maitrise de la propagation et de l'arrêt d'une fissure dans un gazoduc permet d'atteindre un niveau de fiabilité plus élevé. Dans ce cadre, nous nous sommes intéressés, sur un acier pour tubes Ferrito-perlitique, à la rupture par clivage (A -196c) et à la rupture ductile (A +20c). Dans chaque cas, des expériences originales nous ont permis d'étudier précisément la propagation et l'arrêt des fissures. Pour nos géométries d'essai, des simulations numériques en dynamique nous ont montré que les effets d'inertie, liés à la vitesse de propagation élevée (500 à 1000m/s pour le clivage et 30m/s pour la déchirure ductile), sont négligeables. Cependant, la grande vitesse de...
