Download or read book Corrosion Behaviour of Nickel titanium Shape Memory Alloys with Copper and Niobium Additions written by Moipone Linda Lethabane and published by . This book was released on 2013 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies the corrosion behavior of sintered Ni-Ti shape memory alloys containing Cu and Nb additions.Objectives are: 1. Investigate structural and phased interactions occurring during the sintering of the allloys. 2. Study the effects of niobium and copper addition on the general corrosion behavior of the sintered nickel-titanium alloys in sodium chloride and sulphuric acid. 3. Study the effects of copper and niobium addition on localized corrosion behavior of the alloys in chloride environments.
Download or read book Advanced Welding and Deforming written by Kapil Gupta and published by Elsevier. This book was released on 2021-04-17 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Welding and Deforming explains the background theory, working principles, technical specifications, and latest developments on a wide range of advanced welding-joining and deforming techniques. The book's subject matter covers manufacturing, with chapters specifically addressing remanufacturing and 3D printing applications. Drawing on experts in both academia and industry, coverage addresses theoretical developments as well as practical improvements from R&D. By presenting over 35 important processes, from plasma arc welding to nano-joining and hybrid friction stir welding, this is the most complete guide to this field available. This unique guide will allow readers to compare the characteristics of different processes, understand how they work, and create parameters for their effective implementation. As part of a 4 volume set entitled Handbooks in Advanced Manufacturing, this series also includes volumes on Advanced Machining and Finishing, Additive Manufacturing and Surface Treatment, and Sustainable Manufacturing Processes. - Provides theory, operational parameters, and the latest developments in over 35 different processes - Addresses new welding technologies such as additive manufacturing using wire and arc, as well as the latest developments in more traditional applications - Introduces basic concepts in welding, joining and deformation in three introductory chapters, thus helping readers with a range of backgrounds engage with the subject matter
Download or read book Effect of Nitrogen on Fe Mn based Shape Memory Alloys written by Azita Ariapour and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory effect is due to a reversible martensitic transformation. The major drawback in case of Fe-Mn-based shape memory alloys is their inferior shape memory effect compared to Ni-Ti and Cu-based shape memory alloys and their low strength and corrosion resistance compared to steel alloys. It is known that by increasing the alloy strength the shape memory effect can be improved. Nitrogen in solid solution can increase the strength of steels to a greater extent than other major alloying elements. However, its effect on shape memory effect of Fe-Mn-based alloys is ambiguous. In this work first we investigated the effect of nitrogen addition in solid solution on both shape memory effect (SME) and strength of a Fe-Mn-Cr-Ni-Si shape memory alloy (SMA). It was found that interstitial nitrogen suppressed the shape memory effect in these alloys. As an example addition of 0.24 wt % nitrogen in solid solution to the alloy system suppressed the SME by ~80% and increased the strength by 20%. A reduction of martensitic phase formation was found to be the dominant factor in suppression of the SME. This was related, experimentally and theoretically to stacking fault energy of the alloy as well as the driving force and friction force during the transformation. The second approach was doping the alloy with both 0.36 wt% of nitrogen and 0.36 wt% of niobium. Niobium has great affinity for nitrogen and thus NbN dispersed particles can be produced in the alloy following hot rolling. Then particles prevent growth of the alloy and increase the strength of the alloy due to reduced grain size, and precipitation hardening. The improvement of SME in this alloy compared to the interstitial containing alloys was due to the large removal of the nitrogen from solid solution. In case of all the alloys studied in this work, the presence of nitrogen in solid solution improved the corrosion resistance of the alloy. This suggests that nitrogen can replace nickel in the alloy. One of the proposed applications for high strength Fe-Mn-based alloys is as tendon rods in prestressed concrete. The advantage of M alloys in this application is the possibility of producing curved structural prestressed concrete.
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 Advances in Combustion Synthesis and Technology written by Mehmet Bugdayci and published by Bentham Science Publishers. This book was released on 2022-03-21 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference is an accessible update on combustion synthesis and the chemical technology for synthesizing composite materials. Nine chapters offer an overview of the subject with recent references, giving the reader an informed perspective. The book starts with an introduction to thermodynamic models used in combustion synthesis. Subsequent chapters explain the application of combustion synthesis to manufacture different materials such as nanostructured non-ferrous alloys, ceramic powders, functionally graded materials, boron carbide-based superhard materials, shape memory alloys, biomaterials, high-entropy alloys and rare earth phosphates. The range of topics makes this book a useful guide for students, scientists and industrial professionals in the field of chemical engineering, metallurgy and materials science.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Alloying Elements on the Corrosion Behaviour of Copper nickel Alloys in a Marine Environment written by Abulmaali M. Y. Taher and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallization written by S. P. Murarka and published by Butterworth-Heinemann. This book was released on 1993 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title covers fundemental concepts, properties and applicabilities of metals and alloys for use in various metallization schemes. Metallizations form the key components on electronic circuits - controlling device properties and providing power and device interconnections with the outside world or with other devices. The recent advent of submicron dimensions and increasingly faster devices in the semiconductor have challenged researchers to keep metallization schemes in line with new demanding requirements.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1977 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nickel Titanium Materials written by Yoshiki Oshida and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-08-24 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nickel-Titanium alloys are smart materials exhibiting unique properties such as superelasticity and shape-memory effect. The material has been used as orthodontic wires in the dental field for over 20 years. This book is a comprehensive overview to the field of Ni-Ti Materials and the physical, chemical and mechanical properties of this versatile alloy. In addition, complications and challenges exhibited in applications are also discussed.
Download or read book Nickel Cobalt and Their Alloys written by Joseph R. Davis and published by ASM International. This book was released on 2000-01-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive guide to the compositions, properties, processing, performance, and applications of nickel, cobalt, and their alloys. It includes all of the essential information contained in the ASM Handbook series, as well as new or updated coverage in many areas in the nickel, cobalt, and related industries.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1979 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Alloying Additions on Corrosion Behaviour of Nickel molybdenum Alloys in Fused Fluoride Mixtures written by Jackson Harvey DeVan and published by . This book was released on 1960 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cyclic Behavior of Superelastic Nickel titanium and Nickel titanium chromium Shape Memory Alloys written by Laura Isabel Barbero Bernal and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory alloys (SMAs) are a class of alloys that display the unique ability to undergo nonlinear deformations and return to their original shape when heat is applied or the stress causing the deformation is removed. This unique "shape memory" characteristic is a result of a martensitic phase-change, which can be temperature induced (shape memory effect) or stress induced (superelastic effect). In this study, the cyclical behavior of NiTi, a binary shape memory alloy, is compared to the cyclical behavior of NiTiCr, a ternary SMA. The purpose of this study is to compare the behavior of a 0.085-in. diameter NiTiCr wire with the behavior of the same size NiTi wire to determine whether ternary SMAs are more viable ways to take advantage of the unique properties of SMAs for seismic applications. The experimental results showing the superelastic behavior of these alloys under cyclical tensile loading are summarized with attention to the effects of annealing temperature, strain rate, and cyclical training on the stress-strain hysteresis, maximum recoverable strain and equivalent viscous damping.
Download or read book Marine Corrosion Behaviour of Certain Niobium Containing Nickel Base Alloys written by L. R. Davies-Smith and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Niti based Shape Memory Alloys written by Asheesh Lanba and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work aims to experimentally establish processing-structure-property relationships in wide-hysteresis NiTiNb shape memory alloys. Manufactures supplied custom composition cast materials and off-the-shelf deformation processed (i.e. small diameter rods and thin sheets) NiTiNb alloys, and thus different extents of processing are studied. Microstructure characterization of these materials highlights the impact of processing on micro-constituent morphology. Thermo-mechanical experiments are conducted in order to contrast the mechanical and shape memory properties. Micro-deformation measurements are employed to visualize strain localization associated with the differently processed microstructures. Mechanistic and phenomenological rationale are developed that correlate the micro-constituent morphology and its interaction with the underlying martensitic phase transformation to the mechanical and shape memory behavior.The cast and deformation-processed NiTiNb microstructures are characterized via electron and acoustic microscopy. The microstructures are also altered via annealing. The cast microstructure reveals that the addition of Nb as a ternary element in NiTi results in a microstructure with [beta] particles which are primarily Nb in a eutectic mixture with the [alpha] NiTi(Nb) phase. The eutectic mixture is cellular-like with areas of [alpha] NiTi(Nb) matrix material in between. The martensitic transformation, which is a reversible diffusionless crystallographic phase change that can be thermally- or stress-induced between a high temperature austenitic phase and low temperature martensitic phase, only takes place in this matrix. Two different deformation-processed alloys are studied; a rolled sheet and an extruded rod. Deformation-processing breaks up the eutectic structure resulting in a composite microstructure with discontinuous aligned second phase Nb-rich [beta]-particle reinforcements. Annealing causes the Nb-rich particles to grow, and also increases the inter-particle spacing in both cast and deformation processed alloys.The shape memory behavior, characterized via thermal cycling with and without an external stress, and the mechanical properties, characterized from isothermal deformation to failure at different temperatures, are contrasted for cast and deformation-processed microstructures. The stress-free thermal cycling allows us to establish the characteristic transformation temperatures along with the elastic and irreversible energies associated with the transformation. Thermal cycling under load is used to characterize the transformation temperatures, thermal hysteresis, and the recoverable and permanent deformations. The isothermal deformation is used to contrast the stress-induced transformation and subsequent plastic deformation using the critical transformation stress and strain, elastic moduli, yield stress, and strain at failure. The work finds the experimental evidence correlating strain energy relaxation and widening of hysteresis and reverse transformation temperature interval.This comparative study between the cast and deformation processed alloys is augmented by undertaking a multi-scale deformation analysis including digital image correlation to measure micro-scale strain localizations. The strain localizations are characterized in-situ, and allow the comparison of the impact of different micro-constituents on the evolution of localized deformations during the stress-induced transformation and shape memory recovery. Localized regions of high strain accompany the stress-induced transformation in cast alloys that lead to fracture, whereas the stress-induced transformation region in processed alloys has no such strain concentrations.The micro-constituent morphology in both the cast and deformation-processed alloys cause martensite stabilization, however the deformation processed microstructure promotes larger irreversibility and shows evidence of strain energy relaxation that is missing in cast alloys. The eutectic boundaries in the cast microstructure likely prohibit interaction of the martensitic transformation with the particles, and promote large strain localizations during the stress-induced transformation. Such boundaries are missing in the deformation-processed composite microstructure, and thus the particles interact more with the martensitic transformation that leads to the larger irreversibility, improved ductility and better mechanical properties.
