Superplasticity and grain boundaries in ultrafine-grained materials discusses a number of problems associated with grain boundaries in metallic polycrystalline materials. The role of grain boundaries in processes such as grain boundary diffusion, relaxation and grain growth is investigated. Superplasticity and Grain Boundaries in Ultrafine-Grained Materials Woodhead Publishing in Materials A.L. Zhilyaev, A.I. Pshenichnyuk Superplasticity is a state in which solid crystalline materials, such as some fine-grained metals, are deformed well beyond their usual breaking point.
Superplasticity and Grain Boundaries in Ultrafine-Grained Materials Woodhead Publishing in Materials - Kindle edition by Burgess, Peter M., Pshenichnyuk, A I. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Superplasticity and Grain Boundaries in Ultrafine-Grained Materials Woodhead Publishing. ISBN: 085709100X 9780857091000 0857093835 9780857093837: OCLC Number: 751827956: Description: xiv, 312 pages: illustrations; 24 cm. Contents: Introduction Chapter 1: Structural Superplasticity of Polycrystalline Materials 1.1 Structural levels, spatial scales and description levels 1.2 Structural superplasticity: from the combination of mechanisms to cooperative grain boundaries.
Get this from a library! Superplasticity and grain boundaries in ultrafine-grained materials. [Alexander P Zhilyaev; A Pshenichnyuk] -- Superplasticity is a state in which solid crystalline materials, such as some fine-grained metals, are deformed well beyond their usual breaking point. The phenomenon is of importance in processes. Superplasticity refers to the ability of some materials to pull out to exceptionally high elongations prior to failure. It is now well established that superplastic flow requires both a high testing temperature and a small grain size that is typically less than ∼10 μm The processing of ultrafine-grained metals with submicrometer grain sizes through the application of severe plastic. of GBS in superplasticity with d < is also given by Eq. 1 but with Q = Q gb where Q gb is the activation energy for grain boundary diffusion, n = 2, p = 2, and A 10 . The validity of Eq. 1 in describing superplasticity in ultrafine-grained metals is exam-ined later in Section 3. 2. SUPERPLASTIC FLOW IN REPRESENTATIVE ULTRAFINE-GRAINED. The Woodhead Publishing Series in Metals and Surface Engineering is a collection of professional reference books that provide comprehensive reviews on all the major research and technological developments in surface engineering, corrosion and the production and manufacture of metals and commercial alloys. Because grain-boundary segregation 20, 21 and enhancement of the fraction of interphase boundaries 23, 30 can be achieved by SPD processing in different kind of materials, we believe that the.
Enhancing Superplasticity of Ultrafine‐Grained Ti–6Al–4V without Imposing Severe Plastic Deformation. School of Mechanical Engineering, Pusan National University, Busan 46241, Korea. Search for more papers by this author. This method utilizes fine martensites as an initial structure to assist in effective grain refinement even. Buy Superplasticity and Grain Boundaries in Ultrafine-Grained Materials by Alexander P. Zhilyaev, A. I. Pshenichnyuk from Waterstones today! Click and Collect from your local Waterstones or get FREE UK delivery on orders over £20. Grain boundaries have significant effects on the mechanical properties of a wide range of polycrystalline structural materials [1–3]. The role of GBs in these ultrafine-grained materials is enhanced due to the extremely increased amount of GBs, their total area, and the corresponding fraction of near-boundary.
Superplasticity and Grain Boundaries in Ultrafine-Grained Materials, A I Pshenichnyuk, Peter M. Burgess, Woodhead Publishing. Des milliers de livres avec la livraison chez vous en 1 jour ou en magasin avec -5% de réduction. In materials science, superplasticity is a state in which solid crystalline material is deformed well beyond its usual breaking point, usually over about 600% during tensile deformation. Such a state is usually achieved at high homologous temperature.Examples of superplastic materials are some fine-grained metals and ceramics. Other non-crystalline materials amorphous such as silica glass. The authors emphasise the materials aspects of superplasticity. They begin with a brief history of the phenomenon. This is followed by a description of the two major types of superplasticity - fine-structure and internal-stress superplasticity - together with a discussion of their operative mechanisms.
A smart coating is defined as one that changes its properties in response to an environmental stimulus. The Handbook of Smart Coatings for Materials Protection reviews the new generation of smart coatings for corrosion and other types of material protection. Part one explores the fundamentals of smart coatings for materials protection including types, materials, design, and processing. Recent studies have revealed that ultrafine-grained UFG metals and alloys produced by severe plastic deformation SPD can demonstrate extraordinary superplasticity at low temperatures and/or high strain rates. This work presents new results on superplasticity in several UFG Al and Ti alloys focusing on microstructural evolution and strain hardening, as well as the challenges of their. Jun 20, 2015 · The mechanisms of superplasticity occurring in conventional materials, having grains sizes of the order of a few microns, are now understood reasonably well. However, very recent advances in the processing of ultrafine-grained UFG metals have provided an opportunity to extend the understanding of flow behavior to include UFG materials with submicrometer grain sizes. Superplasticity of ultrafine grained low-alloy steels. 1. Introduction.- Superplasticity is the ability of polycrystalline solids metals to achieve extremely high and uniform elongations from 100 to 1000% when applying tensile stresses. material: grain boundary migration and grain boundary shearing/sliding. Theoretical and. Woodhead Publishing Series in Metals and Surface Engineering xix 5 1 Gaseous hydrogen embrittlement of materials in energy technologies Volume 1:.
Upon achieving the grain size of 200 nm, the formability of the alloy at room temperature and at a high strain rate was investigated both experimentally and numerically. Micro deep drawing experiments were performed at different deep drawing ratios 1.66, 1.84, 2.0, and 2.25 and for different sheet thicknesses 0.2, 0.4, and 0.6 mm. Lee "Superplasticity and Grain Boundaries in Ultrafine-Grained Materials" por Peter M. Burgess disponible en Rakuten Kobo. Superplasticity is a state in which solid crystalline materials, such as some fine-grained metals, are deformed well bey. Mar 24, 2017 · The strength or hardness of conventional polycrystalline metals increases with decreasing grain sizes following the classical Hall-Petch relationship 1, 2; the increase in strength is reversely proportional to the square root of grain size.This relationship is established with the strengthening mechanism based on dislocation pileups at grain boundaries GBs, which hinder dislocation motion.
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