Download or read book Torsional Stress Cyclic Fatigue and Thermal Analyses of Heat treated and Conventional Nickel titanium Rotary Instruments written by Joshua D. Gailey and published by . This book was released on 2017 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cyclic And Torsional Fatigue Resistance Of Heat Treated And Conventional Super Elastic Nickel Titanium Files written by Steven J. Todd and published by . This book was released on 2017 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Torsional Properties of Proprietary Heat treated Nickel titanium Rotary Instruments Versus Conventional Nickel titanium written by Ryan P. Romero and published by . This book was released on 2016 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Analysis of Torsional Strength Between Profile GT and GT Series X TM Nickel Titanium Rotary Instruments written by Jake Reynolds and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to compare the resistance to fracture by the twisting of two nickel titanium (NiTi) rotary file systems. The Profile® GT® (GT) and the GT® Series X(TM) (GTX) files were tested to analyze the maximum torsional strength and the maximum angular deflection at the time of separation of the files. For each system, ten new files were tested at each of the following eight taper/size designations for a total of 160 files: 20/0.04, 20/0.06, 30/0.04, 30/0.06, 30/0.08, 40/0.04, 40/0.06, and 40/0.08. The American National Standards Institute / American Dental Association Specification No. 28 was implemented to evaluate torsional limits for these intruments. Files were mounted in a Maillefer Torsiometre machine, which records maximum torsional strength and angular deflection at separation for each file. A two-way ANOVA revealed significant differences after comparing the size and type of file. The GT files required significantly more torque to separate than the GTX files in all groups tested except the GTX file size 20/0.06, which required significantly more maximum torque than the GT file, with no significant difference between the GT and GTX files for size 30/0.04. The GT files exhibited values for angular deflection at separation that were significantly higher than those for the GTX files at sizes 30/0.04 and 40/0.08 and the GTX files exhibited higher values at size 30/0.08 with no significant difference between the brands at the remaining five file sizes. In summary, the GT files required significantly more torque to fracture and exhibited values for angular deflection at separation that were significantly higher than the GTX files for in 6 of 8 and 2 of 8 file sizes, respectively.

Download or read book Torsional Fatigue Profiles of ProTaper Nickel titanium Rotary Instruments written by Gregory M. Soo Chan and published by . This book was released on 2008 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The torsional fatigue profiles of the original ProTaper RTM F2, F3 and ProTaperRTM Universal F2, F3, F4, F5 nickel-titanium rotary instruments were determined using a reversible geared motor assembled according a modification of ANSI/ADA Specification No. 28. The motor was programmed to continuously deflect to a set deflection angle (DA) and then return to zero (rest) until instrument fracture occurred. Ten instruments of each size were tested at various DAs. The mean number of cycles to fracture and standard deviation were determined for each DA. All instruments cycled at larger DAs demonstrated fewer cycles to fracture than those cycled at smaller DAs. The ProTaperRTM Universal F2 and F3 instruments had a significant reduction in torsional fatigue at each tested DA compared to the original ProTaperRTM F2 and F3 instruments. Torsional fatigue is only one mode whereby a nickel-titanium rotary instrument may fracture.

Download or read book Statistical Analysis of Tensile Properties of Heat treated Ti 4A1 3Mo 1V and Ti 2 5A1 16V Sheet written by G. H Beatty and published by . This book was released on 1961 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: IN THE SOLUTION TREATED AND AGED CONDITION, Ti4Al-3Mo-1V has a higher ultimate strength than does Ti-2.5Al-16V, but the two alloys are about even in yield strength and elongation. In the solution-treated condition, Ti-4Al-3Mo-1V is unquestionably stronger than Ti-2.5Al-16V. These conclusions are independent of producer. There is not much difference in the same alloy produced by different companies. The alloys developed under the Titanium-Alloy Sheet-Rolling Program would not endure the most critical interpretation of release property specifications. On the other hand, these alloys come reasonably close to specifications. A complete set of release property specifications is available only for specimens that have been solution treated and aged. Such specimens do not all exhibit the desired ultimate and yield strength, but the percentage of rejects is small enough to be encouraging. (Author).

Download or read book Failure Analysis of Heat Treated Steel Components written by Lauralice de Campos Franceschini Canale and published by ASM International. This book was released on 2008 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Comparison of Torsional Stress and Cyclic Stress Properties of Three Different Rotary and Reciprocating Nickel Titanium File Systems written by Yong Kim and published by . This book was released on 2015 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shape Memory Alloys for Biomedical Applications written by T Yoneyama and published by Elsevier. This book was released on 2008-11-21 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Thermal Analysis for Characterizing Effects of Metallurgical Conditions in Nickel Titanium Based Shape Memory Alloys written by Blake Miller and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape memory alloys (SMAs) undergo a diffusionless solid state transformation (referred as the martensitic transformation) from the high temperature, parent phase austenite to the low temperature, product phase martensite. SMAs recover deformation due to heating, referred to as the shape memory effect (SME). They recover deformation elastic limits beyond typical via unloading, referred as the superelastic effect (SE). Binary NiTi is a specific SMA having properties determined by its Ni composition. Additive manufacturing is important as the layer-by-layer deposition process under desired parameter development allows for microstructure development of NiTi SMAs. Additive manufactured SMAs utilizing Ni-rich compositions (greater than 50.5 at. % / 55.57 wt. % Ni) have been utilized in characterization of the superelastic response. To a lesser extent, research has also used Ti-rich (less than 49.5 at. % / 54.6 wt. % Ni) and near equiatomic (between 49.5 at. %/ 54.6 wt. % and 50.5 at. % / 55.57 wt. % Ni) for studying the SME and SE in NiTi. Primarily research has utilized powder bed fusion (PBF) additive manufacturing while this work looks towards laser directed energy deposition (LDED). This thesis covers Ti-rich LDED NiTi alloys and is one of few to date to report on it. Characterization of the martensitic transformation/shape memory response and subsequent optimization of the thermoelastic properties begins with assessing the thermal-induced shape memory behavior using differential scanning calorimetry (DSC). DSC allows for the ability to determine the temperature ranges for the SME and SE of AM NiTi. DSC uses temperature cycling to measure changing heat flow and endothermic/exothermic events. Endothermic events occur during heating from martensite to austenite (the forward transformation) while exothermic events occur during cooling from austenite to martensite (the reverse transformation). Standard DSC characterization records measurements such as the start, peak, and end temperatures of the forward and reverse transformations. Laser-directed energy deposition (LDED) was used for fabricating Ti-rich AM build coupons which utilized elementally blended Ti and Ni powder feedstock. The layer-by-layer depositions vary in build sizes and thus produce builds with different thermal histories and metallurgical conditions. The first series of build coupons were fabricated as oversized build preforms from which tensile and compression specimens were micromachined. The oversized build preforms have volumes varying between 1500-3950mm3 (XYZ, XZYA, XZYB) and referred to as G0. The second series of build coupons were fabricated as near-net builds with dimensioning close to the designated tension and compression specimens. The near-net builds, referred to as G2, have as-deposited volumes of 2231.4 mm3 for the XYZ build and 3296.5 mm3 for the XZYA build. Specimens were extracted from the fabricated builds with precision wire EDM. DSC is used to study the stress free thermal induced martensitic transformation (TIMT). Standard DSC is performed and its metrics recorded for insight of the TIMT for the AM builds. Standard DSC characterization is augmented to provide advanced metrics for insight into the thermoelastic nature of the AM NiTi builds. Characterization by DSC provides a comparative analysis for the investigating dependence of build, size, and spatial location of elementally blended Ti-rich AM parts on its TIMT. The advanced characterization is used for investigating any dependence of build, size, and spatial location on the thermoelastic nature of the AM builds. We look towards these observations to further advance the research on NiTi additive manufacturing, specifically on Ti-rich materials. An understanding of the TIMT behind Ti-rich NiTi SMAs can allow for production of AM builds having optimal SME properties for applications such as microactuators. Knowledge of the thermoelastic nature in Ti-rich AM NiTi SMAs allows for selection of AM builds with the narrowest hysteresis for pseudo elasticity-based applications.

Download or read book Design of Shape Memory Alloy SMA Actuators written by Ashwin Rao and published by Springer. This book was released on 2015-05-08 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: This short monograph presents an analysis and design methodology for shape memory alloy (SMA) components such as wires, beams, and springs for different applications. The solid-solid, diffusionless phase transformations in thermally responsive SMA allows them to demonstrate unique characteristics like superelasticity and shape memory effects. The combined sensing and actuating capabilities of such materials allows them to provide a system level response by combining multiple functions in a single material system. In SMA, the combined mechanical and thermal loading effects influence the functionality of such materials. The aim of this book is to make the analysis of these materials accessible to designers by developing a "strength of materials" approach to the analysis and design of such SMA components inspired from their various applications with a review of various factors influencing the design process for such materials.

Download or read book Frattura ed Integrit Strutturale Annals 2014 written by Luca Susmel and published by Gruppo Italiano Frattura. This book was released on 2014-09-12 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue of Beta Processed and Beta Heat Treated Titanium Alloys written by and published by Springer. This book was released on 2011-10-29 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue and Corrosion in Metals written by Pietro Paolo Milella and published by Springer Nature. This book was released on with total page 965 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atlas of Fatigue Curves written by Howard E. Boyer and published by ASM International. This book was released on 1985-12-31 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains more than 500 fatigue curves for industrial ferrous and nonferrous alloys. Also includes an explanation of fatigue testing and interpretation of test results. Each curve is presented independently and includes an explanation of its particular importance.

Download or read book Management of Fractured Endodontic Instruments written by Theodor Lambrianidis and published by Springer. This book was released on 2017-09-28 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This superbly illustrated book provides detailed information on the causes of instrument failure during endodontic treatment, the factors influencing the management of such cases, and the diverse management options that may be employed to resolve the problem. Readers will find clear descriptions and comparative evaluation of the available methods, techniques, and devices. Complications that may arise during the management of fractured instruments are described, and the impact of retained file fragments on the prognosis of endodontic treatment is discussed. In addition, means of preventing iatrogenic errors from occurring in the first place (the best form of management) are explained, emphasizing that the risk of instrument failure is reduced if proper guidelines are carefully considered and followed. The book will assist both endodontists and general dental practitioners in achieving an optimal outcome when confronted with the time-consuming and challenging task of dealing with a fractured instrument within the root canal – a still frequent circumstance despite the plethora of improvements in instrument design, alloy composition, and manufacturing processes.

Download or read book Titanium and Titanium Alloys written by Christoph Leyens and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is an excellent reference for materials scientists and engineers needing to gain more knowledge about these engineering materials. Following introductory chapters on the fundamental materials properties of titanium, readers will find comprehensive descriptions of the development, processing and properties of modern titanium alloys. There then follows detailed discussion of the applications of titanium and its alloys in aerospace, medicine, energy and automotive technology.