Author: N. E. ClarkPublisher:
ISBN:
Category :
Languages : en
Pages : 460
Book Description
The Effect of Microstructure on the Fracture Toughness of a High Strength Steel
Author: N. E. ClarkThe Relationship of Microstructure to Strength and Toughness in High-strength Steel
Author: John Henry BucherPublisher:
ISBN:
Category : Fractography
Languages : en
Pages : 138
Book Description
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).
The Effect of Microstructure and Strength on the Fracture Toughness of an 18 No, 300 Grade Maraging Steel
Author: Joseph Adam PsiodaPublisher:
ISBN:
Category : Carnegie-Mellon University
Languages : en
Pages : 0
Book Description
Strength and Toughness of Materials
Author: Toshiro KobayashiPublisher: Springer Science & Business Media
ISBN: 4431539735
Category : Technology & Engineering
Languages : en
Pages : 277
Book Description
As the shift from the Metal Age progresses, materials engineers and materials scientists seek new analytical and design methods to create stronger and more reliable materials. Based on extensive research and developmental work done at the author’s multi-disciplinary material laboratory, this graduate-level and professional reference addresses the relationship between fracture mechanisms (macroscale) and the microscopic, with the goal of explaining macroscopic fracture behavior based on a microscopic fracture mechanism. A careful fusion of mechanics and materials science, this text and monograph systematically considers an array of materials, from metals through ceramics and polymers, and demonstrates lab-tested strategies to develop desirable high-temperature materials for technological applications.
The Effect of Microstructure on the Fracture Toughness of Low-alloy Steels
Author: Syavash EnshaPublisher:
ISBN:
Category : Steel
Languages : en
Pages : 198
Book Description
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).
Metal Fatigue: Effects of Small Defects and Nonmetallic Inclusions
Author: Yukitaka MurakamiPublisher: Elsevier
ISBN: 0080496563
Category : Technology & Engineering
Languages : en
Pages : 384
Book Description
Metal fatigue is an essential consideration for engineers and researchers who are looking at factors that cause metals to fail through stress, corrosion, etc. This is an English translation of a book originally published in Japan in 1993, with an additional two chapters on the fatigue failure of steels and the effect of surface roughness on fatigue strength. The methodology is based on important and reliable results and may be usefully applied to other fatigue problems not directly treated in this book.
Author: Mehmet Hilmi Angin
Author: Vishnoo W. Shahani
Author: 
Author: Jin-Taek Oh