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 Effects of Tempering Treatment on Tensile Hardness and Charpy Impact Properties of Modified 9 Cr 1 Mo Steel written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of Topical Conference on Ferritic Alloys for Use in Nuclear Energy Technologies Snowbird Utah June 19 23 1983 written by John Wolfersperger Davis and published by Society for Mining Metallurgy & Exploration. This book was released on 1984 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Long term Aging on the Impact Properties of Modified 9Cr 1Mo Steel written by and published by . This book was released on 1992 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Charpy impact and room-temperature tensile properties of two heats of modified 9Cr-1Mo steel have been examined after aging at temperatures from 482 to 704C for times up to 75,000 h. In general, aging at lower temperatures (482, 538, or 593C) resulted in little change in the room-temperature tensile properties, but rapid increases in the transition temperature, with the greatest increase for an aging time of 25,000 h. The upper-shelf energy level decreased, reaching a minimum at 25,000 h, followed by recovery at 50,000-h aging. At higher aging temperatures (649 and 704C) there was little change in the transition temperatures, but significant softening at room temperature, and large increases in the upper-shelf energy.

Download or read book INIS Atomindeks written by and published by . This book was released on 1986 with total page 1756 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Heat Treatment on the Mechanical Properties of 1 Per Cent Carbon Steel written by Herbert James French and published by . This book was released on 1922 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts written by and published by . This book was released on 1985 with total page 1218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1983 with total page 1378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book TENSILE Properties of Modified 9Cr 1Mo Steel written by and published by . This book was released on 1982 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tensile Properties of Modified 9 Cr 1 Mo Steel written by V. K. Sikka and published by . This book was released on 1982 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Tempering on the Strength Hardness and Notch Toughness of Hy 130 150 5ni cr mo v Steel written by W. H. Asche and published by . This book was released on 1966 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of tempering in the range of 900 to 1150 F on the tensile propeties, hardness, and Charpy V-notch toughness of HY-130/150, 5Ni-Cr-Mo-V steel was investigated. The investigation confirmed high tempering resistance claimed for the steel. The strength and hardness properties were found to be similar over a tempering range of 900 to 1050 F. The notch toughness, however, increased with increasing tempering temperature. (Author).

Download or read book Effect of Cooling Procedure on Tensile and Charpy Impact Properties of Cr Mo Ultra High Strength Steel written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Specimen Size and Material Condition on the Charpy Impact Properties of 9Cr 1Mo V Nb Steel written by WR. Corwin and published by . This book was released on 1986 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The degradation of fracture resistance of ferritic steels subjected to neutron irradiation can be qualitatively evaluated by examining the shift in the ductile-to-brittle transition temperature and the drop in the upper-shelf energy as determined in the Charpy impact test. That is an empirical test, however, and its usefulness is derived primarily from either correlation to more quantitative measures of fracture toughness or comparison with other Charpy test results for different materials or conditions of interest. Any departures from the standard testing procedures, including specimen dimensions, will yield results which will vary in some degree from those of a standard test.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1985 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Heat Treatment on Microstructure and Hardness of Grade 91 Steel written by and published by . This book was released on 2015 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The modified 9Cr-1Mo steel (Grade 91) is a material of choice in fossil-fuel-fired power plants with increased efficiency, service life, and reduction in emission of greenhouse gases. It is also considered a prospective material for the Next Generation Nuclear Power Plant for application in reactor pressure vessels at temperatures up to 650°C. In this paper, heat treatment of the modified 9Cr-1Mo steel was studied by normalizing and tempering the steel at various temperatures and times, with the ultimate goal of improving its creep resistance and optimizing material hardness. The microstructural evolution of the heat treated steels was correlated with the differential scanning calorimetric results. Optical microscopy, scanning and transmission electron microscopy in conjunction with microhardness profiles and calorimetric plots were used to understand the evolution of microstructure including precipitate structures in modified 9Cr-1Mo steel and relate it to the mechanical behavior of the steel. Thermo-CalcTM calculations were used to support experimental work and provide guidance in terms of the precipitate stability and microstructural evolution. Furthermore, the carbon isopleth and temperature dependencies of the volume fraction of different precipitates were constructed. The predicted and experimentally observed results were found to be in good agreement.

Download or read book Effects of Melting and Processing Variables on the Mechanical Properties of Steel written by George V. Smith and published by . This book was released on 1977 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: