Download or read book Crack Growth in Mercury Embrittled Aluminum Alloys Under Cyclic and Static Loading Conditions written by Joseph A. Kapp and published by . This book was released on 1983 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crack growth rates were measured on three aluminum alloys under cyclic and static loading conditions in laboratory air and in liquid mercury at about +25 deg C. One alloy, 6061-T651, was tested under both loading conditions at temperatures ranging from -25 deg C to +45 deg C. Fracture mechanics techniques were used. Under cyclic loading conditions, no enhanced crack growth in mercury was measured until a critical stress intensity factor range (Delta K) was exceeded. When Delta K increased above the threshold value, the crack growth rae increased by as much as three orders of magnitude, when compared to the crack growth rate in air. From the appearance of the fracture surface the mechanism of embrittlement was deduced to be reduced cohesion. Under static loading conditions, crack velocities of centimeters per second were measured in load control. Under displacement control much slower crack velocities were measured in tow alloys. The decrease in crack velocity was attributed to crack blunting and large plastic zones. Static crack velocity and cyclic crack growth rate increased with decreasing temperature. This unusual temperature effect was related to the kinetics of adsorption of mercury on aluminum. (Author).

Download or read book Crack Growth Behavior of Aluminum Alloys Tested in Liquid Mercury written by J. A. Kapp and published by . This book was released on 1985 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crack growth rate measurements have been made in three mercury embrittled aluminum alloys each under three loading conditions. The alloys were 1100-0, 6061-T651, and 7075-T651. The loading conditions were fixed displacement static loading, fixed load static loading, and fatigue loading at two frequencies. The results showed that mercury cracking of aluminum was not unlike other types of embrittlement (i.e hydrogen cracking of steels). Under fixed load static conditions no crack growth was observed below a threshold stress intensity factor (KILME). At K levels greater that KILME cracks grew on the order of cm/s, while under fixed displacement loading, the crack growth rate was strongly dependent upon the strength of the alloy tested. This was attributed to crack closure. In the fatigue tests, no enhanced crack growth occurred until a critical range of stress intensity factor (Kth) was achieved. The Kth agreed well with the KILME obtained from the static tests, but the magnitude of the fatigue growth rate was substantially less than was expected based on the static loading results. Observations of the fracture surfaces in the scanning electron microscope (SEM) suggested a brittle intergranular fracture mode for the 6061-T651 and the 7075-T651 alloys under all loading conditions. The fractographic features of the 1100-0 alloy under fixed load and fatigue loading conditions were also brittle intergranular. Under fixed displacement loading the cracks grew via a ductile intergranular mode.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crack Initiation and Propagation in Metals in Liquid Mercury Using Fracture Mechanics written by J. A. Kapp and published by . This book was released on 1983 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture mechanics is a useful tool in the study of sub-critical crack growth. This report presents a summary of the results of several recent fracture mechanics studies of liquid metal embrittlement. Specific topics include crack growth measurements under cyclic loading conditions in 6061-T651 alloy embrittled by liquid mercury. The effect of mean stress on fatigue crack growth in a high strength-low alloy steel in mercury is discussed. Crack growth studies under static loading conditions at various temperatures in both 6061-T651 aluminum and 70/30 alpha brass embrittled by mercury are also presented. Finally, some experiments on mercury wetted 70/30 alpha brass in Mode III loading (pure shear) are presented. The results are discussed in relation to transport mechanisms. (Author).

Download or read book Crack Propagation Delayed Failure and Residual Static Strength of Titanium Aluminum and Stainless Steel Alloys in Aqueous Environments written by I. E. Figge and published by . This book was released on 1967 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solutions to Equipment Failures written by P. F. Timmins and published by ASM International. This book was released on with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is concerned primarily with the reduction of equipment failures in sectors of industry. The focus is on the development and application of methodologies which have led to the observed reduced failure rates in the aviation sector and how these can be employed in reducing failure rate in oth

Download or read book Tech Notes written by and published by . This book was released on 1984 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shreir s Corrosion written by and published by Elsevier. This book was released on 2009-02-27 with total page 3652 pages. Available in PDF, EPUB and Kindle. Book excerpt: This four-volume reference work builds upon the success of past editions of Elsevier’s Corrosion title (by Shreir, Jarman, and Burstein), covering the range of innovations and applications that have emerged in the years since its publication. Developed in partnership with experts from the Corrosion and Protection Centre at the University of Manchester, Shreir’s Corrosion meets the research and productivity needs of engineers, consultants, and researchers alike. Incorporates coverage of all aspects of the corrosion phenomenon, from the science behind corrosion of metallic and non-metallic materials in liquids and gases to the management of corrosion in specific industries and applications Features cutting-edge topics such as medical applications, metal matrix composites, and corrosion modeling Covers the benefits and limitations of techniques from scanning probes to electrochemical noise and impedance spectroscopy

Download or read book Journal of Engineering Materials and Technology written by and published by . This book was released on 1986 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts Index written by and published by . This book was released on 1995 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corrosion Abstracts written by and published by . This book was released on 1985 with total page 668 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 1376 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Embrittlement by Liquid and Solid Metals written by M. H. Kamdar and published by . This book was released on 1984 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1981 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Case Histories in Failure Analysis Volume 2 written by Khlefa Alarbe Esaklul and published by ASM International. This book was released on 1992-01-01 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents more than 120 expert failure analysis case histories from industries including automotive, aerospace, utilities, oil and gas, petrochemical, biomedical, ground transportation, off-highway vehicles, and more. Volume 2 builds on the tremendous acceptance of Volume 1 by the failure analysis community. The two volumes can also be purchased as a set for a special discounted price. Learn how others have investigated and solved failures in various industries involving a wide range of failure modes, materials, and analysis techniques.

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1986 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt: