High Temperature Shape Memory Alloys for Useful Devices
High Temperature Shape Memory Alloys for Useful Devices

Author:

Publisher:

Published: 2001

Total Pages: 27

ISBN-13:

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The goal of this project was to develop shape memory alloys with transition temperatures above 100 deg C. The main focus was on TiNiHf. Special vacuum sputtering setups were used to produce thin films having variations in composition, ranging from those rich in Ti+Hf to those rich in Ni. Three targets were used: TiNi, Hf, and Ni. Deposition rates were calibrated separately for each target. These calibrations were used to calculate composition of film deposited by simultaneous sputtering from all three targets. Although this procedure does not permit measurement of absolute composition, it makes possible a methodical search for alloys with increased transition temperature and improved ductility by systematic and controlled variation of composition. Depositions were done with predicted alloy compositions close to 50 at% Ni, the balance being Ti+Hf. The Hf concentration was varied within the range 10 - 15 at%. TiNiHf films were produced having transition temperatures above 100 deg C, with austenite finish temperatures as high as 170 deg C. Measurements of phase transformation temperature, ductility, and composition were made. High ductility and shape recovery up to 4 percent was achieved. Micromachined valve actuators were fabricated and tested. Actuators demonstrated thermomechanical performance similar to that of binary TiNi film.

Shape Memory and Superelastic Alloys
Shape Memory and Superelastic Alloys

Author: K Yamauchi

Publisher: Elsevier

Published: 2011-04-30

Total Pages: 225

ISBN-13: 0857092626

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Shape memory and superelastic alloys possess properties not present in ordinary metals meaning that they can be used for a variety of applications. Shape memory and superelastic alloys: Applications and technologies explores these applications discussing their key features and commercial performance. Readers will gain invaluable information and insight into the current and potential future applications of shape memory alloys.Part one covers the properties and processing of shape memory effect and superelasticity in alloys for practical users with chapters covering the basic characteristics of Ti-Ni-based and Ti-Nb-based shape memory and superelastic (SM/SE) alloys, the development and commercialisation of TiNi and Cu-based alloys, industrial processing and device elements, design of SMA coil springs for actuators before a final overview on the development of SM and SE applications. Part two introduces SMA application technologies with chapters investigating SMAs in electrical applications, hot-water supply, construction and housing, automobiles and railways and aerospace engineering before looking at the properties, processing and applications of Ferrous (Fe)-based SMAs. Part three focuses on the applications of superelastic alloys and explores their functions in the medical, telecommunications, clothing, sports and leisure industries. The appendix briefly describes the history and activity of the Association of Shape Memory Alloys (ASMA).With its distinguished editors and team of expert contributors, Shape memory and superelastic alloys: Applications and technologies is be a valuable reference tool for metallurgists as well as for designers, engineers and students involved in one of the many industries in which shape memory effect and superelasticity are used such as construction, automotive, medical, aerospace, telecommunications, water/heating, clothing, sports and leisure. Explores important applications of shape memory and superelastic alloys discussing their key features and commercial performance Assesses the properties and processing of shape memory effect and superelasticity in alloys for practical users with chapters covering the basic characteristics Introduces SMA application technologies investigating SMAs in electrical applications, hot-water supply, construction and housing, automobiles and railways and aerospace engineering

Shape Memory Alloys
Shape Memory Alloys

Author: Dimitris C. Lagoudas

Publisher: Springer Science & Business Media

Published: 2008-06-05

Total Pages: 446

ISBN-13: 0387476857

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This book provides a working knowledge of the modeling and engineering applications of shape memory alloys (SMAs), beginning with a rigorous introduction to continuum mechanics and continuum thermodynamics as they relate to the development of SMA modeling.Modern SMAs can recover from large amounts of bending and deformation, and millions of repetitions within recoverable ranges. SMAs are used in the medical industry to create stents, in the dental industry to create dental and orthodontic archwires, and in the aerospace industry to create fluid fittings. The text presents a unified approach to the constitutive modeling of SMAs, including modeling of magnetic and high temperature SMAs.

Engineering Aspects of Shape Memory Alloys
Engineering Aspects of Shape Memory Alloys

Author: T W Duerig

Publisher: Butterworth-Heinemann

Published: 2013-10-22

Total Pages: 512

ISBN-13: 1483144755

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Engineering Aspects of Shape Memory Alloys provides an understanding of shape memory by defining terms, properties, and applications. It includes tutorials, overviews, and specific design examples—all written with the intention of minimizing the science and maximizing the engineering aspects. Although the individual chapters have been written by many different authors, each one of the best in their fields, the overall tone and intent of the book is not that of a proceedings, but that of a textbook. The book consists of five parts. Part I deals with the mechanism of shape memory and the alloys that exhibit the effect. It also defines many essential terms that will be used in later parts. Part II deals primarily with constrained recovery, but to some extent with free recovery. There is an introductory paper which defines terms and principles, then several specific examples of products based on constrained recovery. Both Parts III and IV deal with actuators. Part III introduces engineering principles while Part IV presents several of the specific examples. Finally, Part V deals with superelasticity, with an introductory paper and then several specific examples of product engineering.

Shape Memory Alloys for Biomedical Applications
Shape Memory Alloys for Biomedical Applications

Author: T Yoneyama

Publisher: Elsevier

Published: 2008-11-21

Total Pages: 354

ISBN-13: 1845695240

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Shape memory alloys are suitable for a wide range of biomedical applications, such as dentistry, bone repair and cardiovascular stents. Shape memory alloys for biomedical applications provides a comprehensive review of the use of shape memory alloys in these and other areas of medicine. Part one discusses fundamental issues with chapters on such topics as mechanical properties, fabrication of materials, the shape memory effect, superelasticity, surface modification and biocompatibility. Part two covers applications of shape memory alloys in areas such as stents and orthodontic devices as well as other applications in the medical and dental fields. With its distinguished editors and international team of contributors, Shape memory alloys for biomedical applications is an essential reference for materials scientists and engineers working in the medical devices industry and in academia. A comprehensive review of shape memory metals and devices for medical applications Discusses materials, mechanical properties, surface modification and biocompatibility Chapters review medical and dental devices using shape memory metals, including stents and orthodontic devices

Smart Structures Theory
Smart Structures Theory

Author: Inderjit Chopra

Publisher: Cambridge University Press

Published: 2014

Total Pages: 925

ISBN-13: 052186657X

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This book focuses on smart materials and structures, which are also referred to as intelligent, adaptive, active, sensory, and metamorphic. The ultimate goal is to develop biologically inspired multifunctional materials with the capability to adapt their structural characteristics, monitor their health condition, perform self-diagnosis and self-repair, morph their shape, and undergo significant controlled motion.

Shape Memory Materials
Shape Memory Materials

Author: K. Otsuka

Publisher: Cambridge University Press

Published: 1999-10-07

Total Pages: 304

ISBN-13: 9780521663847

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A comprehensive account of shape memory materials, now available in paperback.

Shape Memory Alloy Actuators
Shape Memory Alloy Actuators

Author: Mohammad H. Elahinia

Publisher: John Wiley & Sons

Published: 2016-01-19

Total Pages: 297

ISBN-13: 1118359445

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This book provides a systematic approach to realizing NiTi shape memory alloy actuation, and is aimed at science and engineering students who would like to develop a better understanding of the behaviors of SMAs, and learn to design, simulate, control, and fabricate these actuators in a systematic approach. Several innovative biomedical applications of SMAs are discussed. These include orthopedic, rehabilitation, assistive, cardiovascular, and surgery devices and tools. To this end unique actuation mechanisms are discussed. These include antagonistic bi-stable shape memory-superelastic actuation, shape memory spring actuation, and multi axial tension-torsion actuation. These actuation mechanisms open new possibilities for creating adaptive structures and biomedical devices by using SMAs.

Shape Memory Alloys
Shape Memory Alloys

Author: M. Fremond

Publisher: Springer

Published: 2014-05-04

Total Pages: 152

ISBN-13: 3709143489

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This book consists of two chapters. The first chapter deals with the thermomechanical macroscopic theory describing the transformation and deformation behavior of shape memory alloys. The second chapter deals with the extensive and fundamental review of the experimental works which include crystallography, transformations and mechanical characteristics in Ti-Ni, Cu-base and ferrous shape memory alloys.

Shape Memory Alloy Engineering
Shape Memory Alloy Engineering

Author: Antonio Concilio

Publisher: Elsevier

Published: 2014-09-25

Total Pages: 449

ISBN-13: 0080999212

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Shape Memory Alloy Engineering introduces materials, mechanical, and aerospace engineers to shape memory alloys (SMAs), providing a unique perspective that combines fundamental theory with new approaches to design and modeling of actual SMAs as compact and inexpensive actuators for use in aerospace and other applications. With this book readers will gain an understanding of the intrinsic properties of SMAs and their characteristic state diagrams, allowing them to design innovative compact actuation systems for applications from aerospace and aeronautics to ships, cars, and trucks. The book realistically discusses both the potential of these fascinating materials as well as their limitations in everyday life, and how to overcome some of those limitations in order to achieve proper design of useful SMA mechanisms. Discusses material characterization processes and results for a number of newer SMAs Incorporates numerical (FE) simulation and integration procedures into commercial codes (Msc/Nastran, Abaqus, and others) Provides detailed examples on design procedures and optimization of SMA-based actuation systems for real cases, from specs to verification lab tests on physical demonstrators One of the few SMA books to include design and set-up of demonstrator characterization tests and correlation with numerical models