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Relationships Between Microstructure And Fracture Toughness In A Secondary Hardening Steel
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Book Synopsis Relationships Between Microstructure and Fracture Toughness in a Secondary Hardening Steel by : Roger Dale Goolsby
Download or read book Relationships Between Microstructure and Fracture Toughness in a Secondary Hardening Steel written by Roger Dale Goolsby and published by . This book was released on 1971 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relationships between microstructures and fracture toughness in a secondary hardening steel by : R. D. Goolsby
Download or read book Relationships between microstructures and fracture toughness in a secondary hardening steel written by R. D. Goolsby and published by . This book was released on 1971 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Untempered Ultra High Strength Steels of High Fracture Toughness by : Earl Randall Parker
Download or read book Untempered Ultra High Strength Steels of High Fracture Toughness written by Earl Randall Parker and published by . This book was released on 1974 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the present investigation was to establish, in high yield strength steels, relationships between microstructure, fracture toughness and fatigue crack growth. Extensive microstructural examination and characterization were conducted on as-quenched, and quenched and tempered AISI 4340 steel which was austenitized both at the conventional (870C) and the high (1200C) austenitizing temperatures. Changes in fracture toughness resulting from variations in austenitizing and tempering treatments were related to changes in the amount and distribution of retained austenite, the morphology and distribution of carbides, and the martensite substructure and morphology. The influence of microstructure on fatigue crack propagation was investigated in as-quenched, and quenched and tempered 5Mo-0.3C secondary hardening steel. (Modified author abstract).
Book Synopsis Studies on the Relationship Between Strength, Fracture Toughness, and Microstructure in a Newly Developed 3Cr-1Mo-1Ni-0.2V Pressure Vessel Steel by : Richard Swift McClaughry
Download or read book Studies on the Relationship Between Strength, Fracture Toughness, and Microstructure in a Newly Developed 3Cr-1Mo-1Ni-0.2V Pressure Vessel Steel written by Richard Swift McClaughry and published by . This book was released on 1985 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Relationship of Microstructure to Strength and Toughness in High-strength Steel by : John Henry Bucher
Download or read book The Relationship of Microstructure to Strength and Toughness in High-strength Steel written by John Henry Bucher and published by . This book was released on 1965 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report deals with the relationship of elements of microstructure to the fracture characteristics of a group of commercially produced steels, heat-treated to ultra-high strength levels. The microstructures were characterized in terms of optical microscopy, electron diffraction, and electron fractography. Fractographic studies were made of fractured surfaces broken in impact at +25 and -196 C as a function of tempering temperature, in slow bending at ambient temperature, in a modified bend test in which slow and fast propagation stages were effected, and on surfaces produced in tensile fractures. The fracture characteristics were studied by means of an instrumented bend test and in terms of the plastic instability generated in the torsion test. The instrumented bend test yielded data on criteria for the onset of slow crack propagation and for the onset of rapid propagation, including the effect of the total stored energy in the system. Plastic instability in torsion was studied as a function of specimen section size in AISI 4340 steel. A 250,000 psi yield strength Maraging steel was studied in a standard size test bar. (Author).
Book Synopsis Relationships Between Microstructure and Toughness in Quenched and Tempered Ultrahlgh-Strength Steels by : A. J. Baker
Download or read book Relationships Between Microstructure and Toughness in Quenched and Tempered Ultrahlgh-Strength Steels written by A. J. Baker and published by . This book was released on 1965 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was made of a number of 0.30 and 0.40 per cent carbon alloy steels to determine the relationships between their fracture toughness properties and their internal microstructures. The plane-strain fracture toughness of the steels was measured after tempering quenched material in the temperature range 300 to 1100 F. A thin section transmission electron microscopy study was carried out on the tempered materials. From the fracture toughness studies it was concluded that all the materials behaved similarly and that alloying elements (carbon and silicon) had little influence on the general relationship between tensile strength and toughness in these fully hardenable steels. It was found that the fracture toughness remained low at low tempering temperatures but improved rapidly once a critical tempering temperature, characteristic of the particular steel, was reached. The microscopy study showed that major microstructural changes occurred in the tempering range where the rapid increase in toughness was observed. At low tempering temperatures the defect structure of the as-quenched martensite remained unchanged, and continuous films of carbide were formed in the boundaries of the martensite. In the critical tempering range the carbide films were spheroidized and the defect structure of the matrix removed or modified by recovery processes. On the basis of these observations, it was concluded that the low fracture toughness of the steels in a lightly tempered condition was due to their high defect densities and the presence of carbide films at boundaries. Only when these features were removed or modified did toughness increase.
Book Synopsis Relationship Between Microstructure and Fracture Toughness in D6ac Steel by : N. E. Ryan
Download or read book Relationship Between Microstructure and Fracture Toughness in D6ac Steel written by N. E. Ryan and published by . This book was released on 1974 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Fracture Toughness Mechanism in Ultra-fine-grained Steels by : Toshihiro Hanamura
Download or read book Analysis of Fracture Toughness Mechanism in Ultra-fine-grained Steels written by Toshihiro Hanamura and published by Springer. This book was released on 2014-09-04 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, advanced steel technologies mainly developed at the National Institute for Materials Science (NIMS), Japan, for structure control, mechanical properties, and the related mechanisms are introduced and discussed. NIMS has long worked on developing advanced steel techniques, namely, producing advanced steels by using only simple alloying elements such as carbon, manganese, and silicon, and also by utilizing steel scrap. The hope is that this approach will lead to a technology of a so-called steel-to-steel recycling process, with the ultimate goal of a recycling process such as an automotive-steel-to-automotive-steel recycling process to take the place of the current cascade-type recycling system. The main idea is to utilize ultra-grain refining structures and hetero structures as well as martensite structures. In particular, the focus of this book is on tensile strength and toughness of advanced steels from both the fundamental and engineering points of view. Fundamentally, a unique approach to analysis is taken, based on fracture surface energy as effective grain size is employed to better understand the mechanism of property improvement. From the engineering point of view, in fracture toughness such factors as crack tip opening displacement (CTOD) of advanced steels are evaluated in comparison with those of conventional steels.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975-11 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Microstructure, Mechanical Properties, and Two-body Abrasive Wear Resistance of Modified Secondary Hardening Steels by : Thomas A. Lechtenberg
Download or read book The Microstructure, Mechanical Properties, and Two-body Abrasive Wear Resistance of Modified Secondary Hardening Steels written by Thomas A. Lechtenberg and published by . This book was released on 1979 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Relationship of Microstructure to Fracture Morphology and Toughness of Hardened Hypereutectoid Steels by : G. Krauss
Download or read book The Relationship of Microstructure to Fracture Morphology and Toughness of Hardened Hypereutectoid Steels written by G. Krauss and published by . This book was released on 1983 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantitative correlation of microstructure and fracture toughness for high strength steels and their welds (355-890 MPa) : contract no 7210-PR/312, 1 July 2001 to 30 June 2004 ; final report by : W. Bleck
Download or read book Quantitative correlation of microstructure and fracture toughness for high strength steels and their welds (355-890 MPa) : contract no 7210-PR/312, 1 July 2001 to 30 June 2004 ; final report written by W. Bleck and published by . This book was released on 2006 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Correlation of Microstructure and Fracture Toughness in Two 4340 Steels by : Sunghak Lee
Download or read book Correlation of Microstructure and Fracture Toughness in Two 4340 Steels written by Sunghak Lee and published by . This book was released on 1986 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Correlation of Microstructure with the Strength and Fracture Toughness of Pearlitic Steels by : B. E. O'Donnelly
Download or read book The Correlation of Microstructure with the Strength and Fracture Toughness of Pearlitic Steels written by B. E. O'Donnelly and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Microstructure on the Fracture Toughness of Low-alloy Steels by : Syavash Ensha
Download or read book The Effect of Microstructure on the Fracture Toughness of Low-alloy Steels written by Syavash Ensha and published by . This book was released on 1974 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical model has been used to relate the cleavage fracture toughness of the low-alloy steels to their microstructure. The cleavage fracture toughness of low-alloy steels depends upon three metallurgical parameters: the microscopic cleavage strength, the yield strength, and the effective root radius. Variations in fracture toughness with microstructure can be explained through the effect of the microstructure on these parameters. The major objective of this investigation has been the study of the effect of microstructural variables on these parameters, and hence the effect of microstructure on fracture toughness. The theoretical model for the cleavage fracture toughness of the low-alloy steels can be successfully applied provided the assumptions are not strongly violated. This requires low microscopic cleavage strength/yield strength ratio values and low work-hardening rates. Lower temperatures and higher strain rates both favor these conditions. (Modified author abstract).
