Download or read book Alloy Development and High Energy X Ray Diffraction Studies of NiTiZr and NiTiHf High Temperature Shape Memory Alloys written by Matthew A. Carl and published by . This book was released on 2018 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: NiTi-based shape memory alloys (SMAs) offer a good combination of high-strength, ductility, corrosion resistance, and biocompatibility that has served them well and attracted the attention of many researchers and industries. The alloys unique thermo-mechanical ability to recover their initial shape after relatively large deformations by heating or upon unloading due to a characteristic reversible phase transformation makes them useful as damping devices, solid state actuators, couplings, etc. However, there is a need to increase the temperature of the characteristic phase transformation above 150 °C, especially in the aerospace industry where high temperatures are often seen. Prior researchers have shown that adding ternary elements (Pt, Pd, Au, Hf and Zr) to NiTi can increase transformation temperatures but most of these additions are extremely expensive, creating a need to produce cost-effective high temperature shape memory alloys (HTSMAs). Thus, the main objective of this research is to examine the relatively unstudied NiTiZr system for the ability to produce a cost effective and formable HTSMA. Transformation temperatures, precipitation paths, processability, and high-temperature oxidation are examined, specifically using high energy X-ray Diffraction (XRD) measurements, in NiTi-20 at.% Zr. This is followed by an in situ XRD study of the phase growth kinetics of the favorable H-phase nano precipitates, formed in NiTiHf and NiTiZr HTSMAs, based on prior thermo-mechanical processing in a commercial NiTi-15 at.% Hf HTSMA to examine the final processing methods and aging characteristics. Through this research, knowledge of the precipitation paths in NiTiZr and NiTiHf HTSMAs is extended and methods for characterization of phases and strains using high energy XRD are elucidated for future work in the field.
Download or read book Shape Memory Alloys 2017 written by Takuo Sakon and published by MDPI. This book was released on 2018-03-15 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue Shape Memory Alloys 2017" that was published in Metals
Download or read book Shape Memory Alloys written by M. Fremond and published by Springer. This book was released on 2014-05-04 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Diffraction Investigations of High Temperature Shape Memory Alloys written by Mohammed Abdul Azeem and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shape Memory Alloys Properties Technologies Opportunities written by Natalia Resnina and published by Trans Tech Publications Ltd. This book was released on 2015-03-23 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collective monograph consists of five parts: Theory and modeling of martensitic transformation and functional properties; Martensitic transformations and shape memory effects; Controlling the functional properties of shape memory alloys; Shape memory alloys with complex structure; Application of shape memory alloys) covering of all aspects of shape memory alloys from theory and modelling to applications. It presents the scientific results obtained by leading scientific teams studying shape memory alloys in the former Soviet Republics together with their colleagues from other countries during the last decade.
Download or read book Shape Memory Alloys written by Farzad Ebrahimi and published by BoD – Books on Demand. This book was released on 2017-09-20 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a result of contributions of experts from international scientific community working in different aspects of shape memory alloys (SMAs) and reports on the state-of-the-art research and development findings on this topic through original and innovative research studies. Through its five chapters, the reader will have access to works related to ferromagnetic SMAs, while it introduces some specific applications like development of faster SMA actuators and application of nanostructural SMAs in medical devices. The book contains up-to-date publications of leading experts, and the edition is intended to furnish valuable recent information to the professionals involved in shape memory alloys analysis and applications. The text is addressed not only to researchers but also to professional engineers, students, and other experts in a variety of disciplines, both academic and industrial, seeking to gain a better understanding of what has been done in the field recently and what kind of open problems are in this area.
Download or read book Thin Film Shape Memory Alloys written by Shuichi Miyazaki and published by Cambridge University Press. This book was released on 2009-09-03 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first dedicated book describing the properties, preparation, characterization and device applications of TiNi-based shape memory alloys.
Download or read book X ray Diffraction Investigation of Minor Phases of 20 High temperature Alloys written by B. M. Rosenbaum and published by . This book was released on 1948 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of minor phases present in 20 high-temperature alloys resulted in identification of seven minor phases: columbium carbide, columbium nitride, titanium nitride, chromium carbide (Cr7C3), and carbides of the M23C6 and M6C types (in which the ratio of metal to carbon atoms is 23:6 and 6:1, respectively). Columbium and titanium were found to be very effective nitride and carbide formers. When neither titanium nor columbium is present and chromium is present in the order of 20 percent in these alloys, the minor phase identified changed from these alloys, the minor phase identified changed from Cr7C3 to M23C6 to M6C as the ratio of the molybdenum-plus-tungsten content to the carbon content increased.
Download or read book Shape Memory Alloys written by Francisco Manuel Braz Fernandes and published by BoD – Books on Demand. This book was released on 2013-04-03 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory alloys have become in the past decades a well established research subject. However, the complex relations between properties and structure have created a continuously growing interest for a deeper insight all this time. The complexity of relationships between structure and properties is mostly related to the fact that strong ?multidimensional? interactions are taking place: from the early studies focusing on the thermal and/or mechanical induced phase transformations to the more recent findings on the magnetically induced structural changes. On the other hand, these singular behavioral characteristics have driven a great industrial interest due to the innovative aspects that the applications of shape memory alloys may provide. This makes this subject a highly attractive source of continuous studies, ranging from basics crystallography and thermodynamics to mechanical analysis and electrical and magnetic properties characterization. In this book, a group of recent studies is compiled focusing on a wide range of topics from processing to the relationship between the structure and properties, as well as new applications.
Download or read book Ni free Ti based Shape Memory Alloys written by Hee Young Kim and published by Butterworth-Heinemann. This book was released on 2018-09-20 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ni-free Ti-based Shape Memory Alloys reviews the fundamental issues of biomedical beta-type Ti base shape memory and superelastic alloys, including martensitic transformation, shape memory and superelastic properties, alloy development, thermomechanical treatment and microstructure control, and biocompatibility. Some unique properties, such as large nonlinear elastic behavior and low Young's modulus, observed in metastable Ti alloys are discussed on the basis of phase stability. As it is expected that superelastic Ti alloys will further expand the applications of shape memory alloys within the biomedical field, this book provides a comprehensive review of these new findings in Ti-base shape memory and superelastic alloys.
Download or read book Development of Superelastic Effects in Ferrous Shape Memory Alloy written by Scott Michael Olson and published by . This book was released on 2013 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory alloys (SMAs) with high levels of superelasticity are used where there is a need for the application of large levels of force, or high damping [1]. Current commercially available SMAs require expensive fabrication and lack sufficient ductility for many applications. There is a need for a superelastic material with better properties and easier processing. Y. Tanaka et al. have developed a novel iron based shape memory alloy, NCATB [2]. This alloy still requires complex thermomechanical processing, and does not utilize lessons learned in optimizing Nitinol. To develop the properties of this alloy, it was synthesized in lab from its constituent elements, and thermomechanically processed. Samples were prepared for analysis using conventional metallographic techniques, and investigated with light optical microscopy, scanning electron microscopy equipped with energy dispersive spectroscopy, X-ray diffraction, and mechanical testing. The recrystallization following cold rolling, as well as aging heat treatments, were determined to be critical to increasing the hardness of the NCATB. Overall, smaller grains and longer aging times increased the hardness. The as-cast microstructure exhibits significant tantalum segregation along the dendrite boundaries. Incomplete homogenization of the as-cast microstructure leads to a propensity for a Tarich phase to form along subsequent recrystallized grain boundaries. This phase lead to alloy embrittlement, preventing the NCATB as processed from having the desired superelasticity. An additional high temperature thermomechanical treatment following casting solutionized the tantalum from the dendrite boundaries, and further improved the NCATB hardenability.
Download or read book Shape Memory Alloys written by Vasiliy Buchelnikov and published by Materials Research Forum LLC. This book was released on 2018-12-10 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents selected, peer reviewed papers from the 3rd International Conference on “Shape Memory Alloys” (SMA 2018). Covered are: Physical, mechanical and functional properties of shape memory alloys. Structure and martensitic phase transformations. Theory and mathematical modelling. Materials design and calculations of functional properties. Design, synthesis and functional properties of novel materials. Manufacturing technology and applications of shape memory alloys.
Download or read book Metals Abstracts written by and published by . This book was released on 1996 with total page 1628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shape Memory Alloys written by Corneliu Cismasiu and published by BoD – Books on Demand. This book was released on 2010-10-18 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decades, the Shape Memory Alloys, with their peculiar thermo-mechanical properties, high corrosion and extraordinary fatigue resistance, have become more popular in research and engineering applications. This book contains a number of relevant international contributions related to their properties, constitutive models and numerical simulation, medical and civil engineering applications, as well as aspects related to their processing.
Download or read book Characterization of Ni RICH NiTiHf Based High Temperature Shape Memory Alloys written by Gurdish S. Ded and published by . This book was released on 2010 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamental and Applied Research and Development in Metallurgy written by A. L. Geary and published by . This book was released on 1963 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shape Memory Alloy Engineering written by Antonio Concilio and published by Elsevier. This book was released on 2014-09-25 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
