The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform
Markus Haapasalo - One of the best experts on this subject based on the ideXlab platform.
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current challenges and concepts of the Thermomechanical Treatment of nickel titanium instruments
Journal of Endodontics, 2013Co-Authors: Ya Shen, Huimin Zhou, Yufeng Zheng, Bin Peng, Markus HaapasaloAbstract:Abstract Introduction The performance and mechanical properties of nickel-titanium (NiTi) instruments are influenced by factors such as cross-section, flute design, raw material, and manufacturing processes. Many improvements have been proposed by manufacturers during the past decade to provide clinicians with safer and more efficient instruments. Methods The mechanical performance of NiTi alloys is sensitive to their microstructure and associated Thermomechanical Treatment history. Heat Treatment or thermal processing is one of the most fundamental approaches toward adjusting the transition temperature in NiTi alloy, which affects the fatigue resistance of NiTi endodontic files. The newly developed NiTi instruments made from controlled memory wire, M-Wire (Dentsply Tulsa Dental Specialties, Tulsa, OK), or R-phase wire represent the next generation of NiTi alloys with improved flexibility and fatigue resistance. The advantages of NiTi files for canal cleaning and shaping are decreased canal transportation and ledging, a reduced risk of file fracture, and faster and more efficient instrumentation. The clinician must understand the nature of different NiTi raw materials and their impact on instrument performance because many new instruments are introduced on a regular basis. Results This review summarizes the metallurgical properties of next-generation NiTi instruments, the impact of Thermomechanical Treatment on instrument flexibility, and the resistance to cyclic fatigue and torsion. Conclusions The aim of this review was to provide clinicians with the knowledge necessary for evidence-based practices, maximizing the benefits from the selection and application of NiTi rotary instruments for root canal Treatment.
Dierk Raabe - One of the best experts on this subject based on the ideXlab platform.
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refinement of grain boundary carbides in a si cr spring steel by Thermomechanical Treatment
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2006Co-Authors: Araz Ardehali Barani, Dirk Ponge, Dierk RaabeAbstract:Abstract The microstructure and mechanical properties of conventionally heat treated or Thermomechanically treated spring steel Fe–0.56C–1.50Si–0.67Cr–0.59Mn (mass%) are presented after tempering. At tempering temperatures between 623 and 673 K continuous cementite films form at the prior austenite grain boundaries when the austenite is quenched without any preceding deformation. Two austenite modifications, a recrystallized variant and an elongated pan-cake grain structure were produced by deformation prior to quenching. The first variant resulted in refined grain boundary carbides after tempering, while for the latter no grain boundary carbides were observed. Both modifications of austenite produced by Thermomechanical Treatment improve the ductility significantly.
A. I. Khorev - One of the best experts on this subject based on the ideXlab platform.
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Heat and Thermomechanical Treatment and textural hardening of weldable titanium alloys
Welding International, 2013Co-Authors: A. I. KhorevAbstract:The theoretical and practical principles of heat, Thermomechanical Treatment and textural hardening of weldable titanium alloys are described. The results of investigations of the effect of deformation and heat Treatment on the mechanical properties of welded joints in titanium alloys are presented.
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Thermal and Thermomechanical Treatment of titanium alloys
Russian Engineering Research, 2011Co-Authors: A. I. KhorevAbstract:Methods of thermal and Thermomechanical Treatment of titanium alloys are outlined, along with the corresponding temperature and deformation conditions. Means of cost reduction in the manufacture of various structures from these alloys are proposed, along with means of improving the reliability.
A. G. Fazlitdinova - One of the best experts on this subject based on the ideXlab platform.
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structure of sp2 carbon fiber prepared by high temperature Thermomechanical Treatment of polyacrylonitrile fiber a raman and x ray diffraction study
Russian Chemical Bulletin, 2018Co-Authors: S S Bukalov, V. A. Tyumentsev, L A Leites, Alexander S Goloveshkin, A. G. FazlitdinovaAbstract:Structural regularities of the transformation of PAN fibers into high-strength sp2-carbon fiber by high-temperature Thermomechanical Treatment were established using Raman spectroscopy and X-ray diffraction. Radial heterogeneity of the fiber structure was revealed and quantitatively characterized by Raman micro-mapping.
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Effect of Thermomechanical Treatment modes on nanostructure formation in thermally stabilized polyacrylonitrile fiber
Russian Journal of Applied Chemistry, 2011Co-Authors: A. G. Fazlitdinova, V. A. Tyumentsev, E. P. Mayanov, S. A. PodkopaevAbstract:Structure of the crystalline component of a polyacrylonitrile fiber was studied in isothermal Thermomechanical Treatment by comparing X-ray diffraction data at various temperatures and mechanical loads of thermal stabilization.
V A Lutsenko - One of the best experts on this subject based on the ideXlab platform.
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structure and properties of nickel molybdenum steel wire rod after Thermomechanical Treatment
Steel in Translation, 2012Co-Authors: V A LutsenkoAbstract:The mechanical properties and structure of low-carbon nickel-molybdenum steel wire rod after softening Thermomechanical Treatment in a high-speed wire mill are studied. Dislocations may move through insular martensite and bainite sections of the structure under the action of deformation. Good plasticity of wire rod in deformational shaping may be ensured by the presence of a small proportion (up to 10%) of sections with bainite-martensite structure and the motion of dislocations through those sections.
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influence of Thermomechanical Treatment and alloying on the properties of high carbon wire rod
Steel in Translation, 2010Co-Authors: V A Lutsenko, V A Matochkin, Yu L Khudolei, V G Chernichenko, O V LutsenkoAbstract:Kinetic data on austenite decomposition in high-carbon alloy steel in the continuous cooling of wire rod permit the determination of the best Thermomechanical Treatment. Regulation of the chemical composition of the steel (the carbon, chromium, and manganese content) and optimal Thermomechanical Treatment ensure the structure and properties of the wire rod for superhigh-strength wire and metal cord.
