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Composition- and temperature-dependence of β to ω phase transformation in Ti-Nb alloys

2023-07-06 Technology & Engineering
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Release : 2023-07-06
Genre : Technology & Engineering
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Composition- and temperature-dependence of β to ω phase transformation in Ti-Nb alloys by : Yunting Su

Download or read book Composition- and temperature-dependence of β to ω phase transformation in Ti-Nb alloys written by Yunting Su. This book was released on 2023-07-06. Available in PDF, EPUB and Kindle. Book excerpt: ω phases have shown great effects on the superelasticity and modulus of metastable β-Ti alloys. In this study, the microstructure evolution during cooling and aging for β → ω phase transformation is investigated by integrating a thermodynamic database with phase field simulations. Our CALPHAD calculations based on an available thermodynamic database give the Gibbs energies of metastable β (Nb-lean β1 + Nb-rich β2 produced via spinodal decomposition) and ω phases in Ti-Nb. Informed by the results, our phase field simulations show that the formation mechanisms of ω exhibit dependence on the composition and temperature. The ω can form in Ti-26 at.% Nb without the assistance of spinodal decomposition. Further analysis shows that the precursory spinodal decomposition in the β phase occurs in Ti-50 at.% Nb, and could induce geometrically confined ω. The novel transformation pathway could create unique morphology of ω. This study could elucidate new insights into the ω phase transformation in Ti-Nb alloys and metastable β-Ti alloys having spinodal decomposition.

Phase Transformations

2010-05-31 Technology & Engineering
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Release : 2010-05-31
Genre : Technology & Engineering
Kind : eBook
Book Rating : 792/5 ( reviews)

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Book Synopsis Phase Transformations by : Srikumar Banerjee

Download or read book Phase Transformations written by Srikumar Banerjee. This book was released on 2010-05-31. Available in PDF, EPUB and Kindle. Book excerpt: The terms phase transitions and phase transformations are often used in an interchangeable manner in the metallurgical literature. In Phase Transformations, transformations driven by pressure changes, radiation and deformation and those occurring in nanoscale multilayers are brought to the fore. Order-disorder transformations, many of which constitute very good examples of continuous transformations, are dealt with in a comprehensive manner. Almost all types of phase transformations and reactions that are commonly encountered in inorganic materials are covered and the underlying thermodynamic, kinetic and crystallographic aspects elucidated. Shows readers the advancements in the field - due to enhanced computing power and superior experimental capability Drawing upon the background and the research experience of the authors, bringing together a wealth of experience Written essentially from a physical metallurgists view point

Gamma Titanium Aluminide Alloys

2011-10-17 Technology & Engineering
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Release : 2011-10-17
Genre : Technology & Engineering
Kind : eBook
Book Rating : 25X/5 ( reviews)

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Book Synopsis Gamma Titanium Aluminide Alloys by : Fritz Appel

Download or read book Gamma Titanium Aluminide Alloys written by Fritz Appel. This book was released on 2011-10-17. Available in PDF, EPUB and Kindle. Book excerpt: The first book entirely dedicated to the topic emphasizes the relation between basic research and actual processing technologies. As such, it covers complex microstructures down to the nanometer scale, structure/property relationships and potential applications in key industries. From the contents: * Constitution * Thermophysical Constants * Phase Transformations and Microstructures * Deformation Behaviour * Strengthening Mechanisms * Creep * Fracture Behaviour * Fatigue * Oxidation Resistance and Related Issues * Alloy Design * Ingot Production and Component Casting * Powder Metallurgy * Wrought Processing * Joining * Surface Hardening * Applications and Component Assessment

Ni-free Ti-based Shape Memory Alloys

2018-09-17 Technology & Engineering
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Release : 2018-09-17
Genre : Technology & Engineering
Kind : eBook
Book Rating : 846/5 ( reviews)

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Book Synopsis Ni-free Ti-based Shape Memory Alloys by : Hee Young Kim

Download or read book Ni-free Ti-based Shape Memory Alloys written by Hee Young Kim. This book was released on 2018-09-17. 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. Includes coverage of phase transformations in titanium alloys Discusses mechanical properties and alloy development Presents a review of Ti-based shape alloys and their applications

Shape Memory and Superelastic Alloys

2011-04-30 Technology & Engineering
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Release : 2011-04-30
Genre : Technology & Engineering
Kind : eBook
Book Rating : 626/5 ( reviews)

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Book Synopsis Shape Memory and Superelastic Alloys by : K Yamauchi

Download or read book Shape Memory and Superelastic Alloys written by K Yamauchi. This book was released on 2011-04-30. Available in PDF, EPUB and Kindle. Book excerpt: 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

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