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Author: CALIFORNIA UNIV BERKELEY. Publisher: ISBN: Category : Languages : en Pages : 82
Book Description
Several different ways of microstructural control were attempted in maraging type steels in order to achieve a combination of high strength and high toughness. In Section I, the composition, processing and mechanical properties of Fe-Ni-Ti alloys are described. It is found that high nickel content and high aging temperature are beneficial for toughness. This alloy system, however, does not exhibit high toughness due to the extensive grain boundary precipitation during aging. In Section II, the well-known toughening mechanisms, i.e., grain refinement, retained austenite, and the TRIP mechanism are incorporated to a 250 grade maraging stee. The improvement in fracture toughness is obtained only when the retained austenite remains stable during deformation. The microduplex maraging steel preserves its high fracture toughness upon high strain rate fracture in contrast to most of the martensitic steels. In Section III initial success is reported with an alternate toughening technique: the introduction of a dense mobile dislocation density through rapid phase transformation of a partially maraged structure.
Author: CALIFORNIA UNIV BERKELEY. Publisher: ISBN: Category : Languages : en Pages : 82
Book Description
Several different ways of microstructural control were attempted in maraging type steels in order to achieve a combination of high strength and high toughness. In Section I, the composition, processing and mechanical properties of Fe-Ni-Ti alloys are described. It is found that high nickel content and high aging temperature are beneficial for toughness. This alloy system, however, does not exhibit high toughness due to the extensive grain boundary precipitation during aging. In Section II, the well-known toughening mechanisms, i.e., grain refinement, retained austenite, and the TRIP mechanism are incorporated to a 250 grade maraging stee. The improvement in fracture toughness is obtained only when the retained austenite remains stable during deformation. The microduplex maraging steel preserves its high fracture toughness upon high strain rate fracture in contrast to most of the martensitic steels. In Section III initial success is reported with an alternate toughening technique: the introduction of a dense mobile dislocation density through rapid phase transformation of a partially maraged structure.
Author: Toshiro Kobayashi Publisher: Springer Science & Business Media ISBN: 9784431200383 Category : Science Languages : en Pages : 290
Book Description
As the shift from the Metal Age progresses, materials engineers and materials scientists seek new analytical and design methods to create stronger and more reliable materials. Based on extensive research and developmental work done at the author’s multi-disciplinary material laboratory, this graduate-level and professional reference addresses the relationship between fracture mechanisms (macroscale) and the microscopic, with the goal of explaining macroscopic fracture behavior based on a microscopic fracture mechanism. A careful fusion of mechanics and materials science, this text and monograph systematically considers an array of materials, from metals through ceramics and polymers, and demonstrates lab-tested strategies to develop desirable high-temperature materials for technological applications.
Author: J. E. Campbell Publisher: ISBN: Category : Steel, High strength Languages : en Pages : 22
Book Description
The Memorandum discusses the current situation on the inclusion of fracture-toughness testing requirements in specifications for high-strength steels used for military applications. The Memorandum was prepared at the request of The Technical Cooperation Program (TTCP), and contains information from Canadian and British members of that program, as well as U.S. information. Military applications discussed include missile motor cases, aircraft landing gear, gun tubes, armor plate, and hydrofoils. (Author).
Author: Mahmoud Y. Demeri Publisher: ASM International ISBN: 1627080058 Category : Business & Economics Languages : en Pages : 312
Book Description
Examines the types, microstructures and attributes of AHSSAlso reviews the current and future applications, the benefits, trends and environmental and sustainability issues.
Author: Koh-ichi Sugimoto Publisher: MDPI ISBN: 3039434284 Category : Technology & Engineering Languages : en Pages : 158
Book Description
A variety of topics concerning ultrahigh-strength ferrous steels were collected in this book. At present, most of the ferrous steels are applied to cold sheet parts. However, they may be used as the materials of hot-forged parts in the future, because of the excellent performance of the mechanical properties. It is hoped that many researchers will have an interest in the applications of the ferrous steels to the hot-forging parts.
Author: Publisher: ISBN: Category : Languages : en Pages : 31
Book Description
The immediate objective of this investigation was to explore the potential advantages of new high strength (65 to 120 ksi yield) steels produced by advanced steel making and on-line processing techniques for marine applications. A longer term objective is to facilitate the introduction to the shipbuilding industry of the new high strength steels processed by advanced on-line processing techniques with toughness and weldability properties beyond those currently available. The study has provided a preliminary characterization of newly developed steels with yield strengths varying from 65 ksi to 120 ksi. On the basis of the preliminary data obtained. it appears that by use of advanced metallurgical processes. high strength steels can be produced which provide improved toughness and weldability; the alloying elements required for such steels could be substantially lower than that required for conventionally processed quenched and tempered steels of the same strength and toughness levels.
Author: Ricardo Branco Publisher: Mdpi AG ISBN: 9783036520131 Category : Technology & Engineering Languages : en Pages : 222
Book Description
Advanced high-strength steels play an important role in many industries and engineering applications because of the excellent combination of mechanical properties important for design, e.g., strength, fatigue, fracture, wear, and manufacturability. In many challenging applications, structural components can be subjected to severe service conditions and, therefore, high-strength steels are often the only choice in these applications. Therefore, understanding the relationships between the mechanical properties and the chemical composition, microstructural features, and manufacturing methods is pivotal to developing safe and durable structures. The goal of this book is to foster a dissemination of the latest research outcomes in the field of advanced high-strength steels from various perspectives. In this volume, a total of thirteen papers, addressing a number of important research problems and developments, have been collected, namely the relationship between microstructure and mechanical properties, the effect of heat treatment variables on the mechanical behaviour, fatigue, and fracture resistances under different loading conditions as well as the weldability, just to mention a few. These articles represent a significant contribution to the research field.
Author: CALIFORNIA UNIV BERKELEY.
Author: CALIFORNIA UNIV BERKELEY.
Author: Toshiro Kobayashi
Author: J. E. Campbell
Author: Mahmoud Y. Demeri
Author: 
Author: Koh-ichi Sugimoto
Author: 
Author: A. M. Hall
Author: E. Ineson
Author: Ricardo Branco