Download or read book Influence of Final Tempering Temperature on Side grooved Super high Energy Charpy Specimens of 9310 Steel second Phase written by Enrico Lucon and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During Fiscal Year (FY) 2022, a study (presented in NIST IR8424) was conducted at NIST to identify the optimal combination of heat treatment (specifically, final tempering temperature) and side-groove depth for super-high energy reference Charpy specimens of 9310 steel. During FY23, a second phase of this investigation took place, wherein two additional values of the final tempering temperature were tested, while keeping the side-groove depth at the value previously established (0.9 mm/side, corresponding to 18 % of the original thickness). In consideration of the overall activities performed, final recommendations concerning the final tempering temperature and the side-groove depth are formulated for future NIST reference specimens of super-high energy level, manufactured from 9310 steel.

Download or read book Influence of Side groove Depth and Heat Treatment on Super high Energy Charpy Specimens of 9310 Steel written by Enrico Lucon and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: NIST provides certified reference Charpy specimens to companies and laboratories around the world for the indirect verification of impact machines in accordance with ASTM E23. Specimens are available at three energy levels, low (?15 J at 40 ?C), high (?100 J at -40 ?C), and super-high (?200 J at room temperature). Specimens of this latter energy level have been out of stock from the late 2000s until the late 2010s, when specimens of AISI 9310 steel were found to be suitable for standardization, provided they were side-grooved in order to prevent the formation of shear lips. This study was aimed at establishing an optimal combination of heat treatment (specifically, final tempering temperature) and side-groove depth for Charpy specimens of 9310 steel, and was conducted by testing almost 900 specimens corresponding to six different combinations. As a result of this study, a recommendation for the heat treatment and side-groove depth of future super-high energy specimen lots was formulated.

Download or read book Relation of the High temperature Treatment of High speed Steel to Secondary Hardening and Red Hardness written by Howard Scott and published by . This book was released on 1920 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Grain refining Heat Treatments to Improve Cryogenic Toughness of High strength Steels written by Homer F. Rush and published by . This book was released on 1984 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Test Temperature Range for NIST Certified Charpy Specimens for Testing at room Temperature written by Enrico Lucon and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NIST Charpy Machine Verification Program is ready to introduce low-energy and high-energy certified specimens that can be tested at room temperature instead of -40 ℗ʻC, thus accommodating the requests of many customers during the past 35 years. An investigation aimed at providing a practical and technically sound definition of "room temperature" (barycentric value and tolerance) was conducted, by examining previously obtained Charpy energy transition curves for different energy levels, as well as by testing certified low-energy and high-energy specimens at 21 ℗ʻC (ambient temperature of the NIST Charpy Lab in Boulder, Colorado) and additional temperatures in the range 21 ℗ʻC ℗ł 5 ℗ʻC. Results have shown that for low-energy specimens, even within a relatively small 10 ℗ʻC range, the influence of test temperature on Charpy absorbed energy can be significant enough to cause "good" machines to fail the requirements of the ASTM E23 standard. Therefore, at this energy level, the allowable test temperature range must be restricted to 21 ℗ʻC ℗ł 1 ℗ʻC. For the other two energy levels (high and super-high), the influence of test temperature is small enough that the allowable temperature range can be expanded to 21 ℗ʻC ℗ł 3 ℗ʻC.

Download or read book Effects of Tempering Treatment on Tensile Hardness and Charpy Impact Properties of Modified 9 Cr 1 Mo Steel LMFBR written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of tempering temperature and time on the tensile properties and hardness of modified 9 Cr-1 Mo steel at room temperature and on its Charpy impact energy at room temperature and at 204/sup 0/C are studied. Effects of postweld heat treatment on room-temperature tensile properties were also investigated, and tensile data at elevated temperatures were obtained for selected tempering conditions. The room-temperature tensile properties (strength and ductility), hardness and Charpy impact energy were fitted to a Holloman-Jaffe (HJ) parameter with an optimized constant of 22.3. This parameter allows the trade-off of tempering temperature and time to obtain the desirable properties. The same parameter was also suitable for obtaining the effects of post-weld heat treatment on tensile properties. The effects of specimen size and full-size tubular specimens on tensile properties are presented. The yield and ultimate tensile strengths were plotted as functions of hardness. Optical and scanning electron micrographs showed similar microstructures in specimens subjected to tempering conditions producing the same value of the HJ parameter.

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 International Aerospace Abstracts written by and published by . This book was released on 1980 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gear Materials Properties and Manufacture written by Joseph R. Davis and published by ASM International. This book was released on 2005 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: All of the critical technical aspects of gear materials technology are addressed in this new reference work. Gear Materials, Properties, and Manufacture is intended for gear metallurgists and materials specialists, manufacturing engineers, lubrication technologists, and analysts concerned with gear failures who seek a better understanding of gear performance and gear life. This volume complements other gear texts that emphasize the design, geometry, and theory of gears. The coverage begins with an overview of the various types of gears used, important gear terminology, applied stresses and strength requirements associated with gears, and lubrication and wear. This is followed by in-depth treatment of metallic (ferrous and nonferrous alloys) and plastic gear materials. Emphasis is on the properties of carburized steels, the material of choice for high-performance power transmission gearing.

Download or read book Metals Abstracts written by and published by . This book was released on 1989 with total page 1266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Aspects of Critical Materials Use by the Steel Industry written by and published by . This book was released on 1983 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern Marine Engineer s Manual written by Alan Osbourne and published by Cornell Maritime Press/Tidewater Publishers. This book was released on 1965 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume II of the manual that has been absolutely indispensable to the ship's engineer for over forty years was completely updated by a team of practicing marine engineers in 1991. Chapters on obsolete equipment were deleted; those on systems that are still current were updated; and new chapters were written to cover the innovations in materials, machines, and operating practices that evolved recently.

Download or read book Integral structural Polymer Foams written by Fedor Anatolʹevich Shutov and published by Springer. This book was released on 1986 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Low Temperature Annealing of 7 62 Mm Brass Cartridge Cases written by David S. Saunders and published by . This book was released on 1980 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Formulas for Stress Strain and Structural Matrices written by Walter D. Pilkey and published by John Wiley & Sons. This book was released on 2005 with total page 1544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Description

Download or read book Design for Manufacturability Handbook written by James G. Bralla and published by McGraw Hill Professional. This book was released on 1999 with total page 1361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers a blueprint for various stages of the manufacturing process. This handbook provides directions for solid and practical design, including a quick check of do's and don'ts as well as specific tips for developing the most producible design. It also includes the details needed to forecast a successful design project.

Download or read book Lubrication Corrosion and Wear written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1966 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: