Download or read book Stress Corrosion Crack Initiation Testing of High Strength Aluminium Alloys Using Tuning Fork Type Specimens written by L. Schra and published by . This book was released on 1981 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Corrosion Crack Initiation Testing of High Strength Aluminium Using Alloys Using Tuning Fork Type Specimens written by L. Schra and published by . This book was released on 1981 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress corrosion Cracking of Aluminum Alloys written by J. D. Jackson and published by . This book was released on 1965 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Use of Precracked Specimens in Stress Corrosion Testing of High Strength Aluminum Alloys written by Michael V. Hyatt and published by . This book was released on with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resistance to stress-corrosion cracking of 10 high-strength aluminum alloys in a variety of heat-treatment conditions was measured using precracked double cantilever beam (DCB) specimens. A new technique is described, and stress-corrosion crack growth rates for the alloys tested are presented as a function of the plane-strain stress intensity K(I). Double cantilever beam specimen data correlated with established trends from smooth specimens tested by alternate immersion in 3.5% NaCl solution. From the crack growth rate data and the speed and simplicity with which it is obtained, it is concluded that the DCB specimen will be highly useful for (1) comparing and rating alloys, (2) developing new alloys and heat treatments, (3) comparing the effects of environments, (4) achieving or ensuring product uniformity, and (5) studying mechanisms of cracking. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1982 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Testing Parameters on Stress Corrosion Crack Growth in the High Strength Aluminium Alloy 7010 T651 written by L. Schra and published by . This book was released on 1996 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: An interlaboratory testing programme to evaluate the rising displacement test for stress corrosion crack (SCC) growth investigations was carried out within the framework of the "Measurements and Testing" programme of the European Community under BCR contract nr. MATI CT 930038. The contribution of the NLR to the project consisted of testing of precracked Double Cantilever Beam (DCB) Specimens made from the high strength aluminium alloy 7010-T651 under constant displacement and by continuous immersion in substitute ocean water. The results of these static tests were to be used as reference data for the dynamic rising displacement tests carried out by other participants in the project. Further, additional static tests were carried out by the NLR using alternate y. Duriimmersion in substitute ocean water. The results of these tests were compared with those of 7010-T651 plate from another batch of material tested previously at the NLR.
Download or read book Stress corrosion Cracking of Aluminum Alloys written by Gunter Ogiermann and published by . This book was released on 1968 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes information from selected European papers and lectures that were published or presented between mid 1967 and July 1, 1968. Subjects discussed include: the nature of stress-corrosion, stress-corrosion in AlMg, AlMgZn, and AlMgSi alloys and testing for susceptibility to stress-corrosion cracking. (Author).
Download or read book Evaluating Stress Corrosion Crack Propagation Rates in High Strength Aluminum Alloys with Bolt Loaded Precracked Double Cantilever Beam Specimens written by JW. Coursen and published by . This book was released on 1976 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propagation rates for stress-corrosion cracking (SCC) of high-strength aluminum alloys determined with mechanically precracked double-cantilever-beam (DCB) specimens provide a quantitative means of comparing the resistance to SCC of alloys and tempers. For relatively resistant materials however, the rates can be markedly influenced by test conditions and interpretation of the crack-growth data. This paper describes a relatively simple, accelerated testing method for determining SCC velocities that rank the SCC behavior of aluminum alloys in the same order as SCC propagation rates in a seacoast or industrial atmosphere. Practical difficulties associated with this test method, however, warrant further evaluation to justify this as a primary method of testing.
Download or read book An Automated Method for Evaluating Resistance to Stress Corrosion Cracking with Ring Loaded Precracked Specimens written by JG. Kaufman and published by . This book was released on 1976 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a ring-loading method for evaluating stress-corrosion resistance with precracked specimens and presents representative data for compact specimens of some high-strength aluminum alloys. The deflection of the ring was large relative to that of the specimen, simulating deadweight loading. This method provides several advantages over techniques previously used. Unlike most constant-displacement loading systems, the load and crack length and thus the stress intensity are known accurately throughout the life of each test, and the initiation and growth of stress-corrosion cracking (SCC) lead to a definitive end point (failure). Also, the effects of corrosion product wedging are minimal. The ring loading system is more compact than most deadweight systems, and because it is readily automated, data can be collected with the expenditure of few manhours.
Download or read book Stress corrosion Cracking of Aluminum Alloys written by F. R. Mertens and published by . This book was released on 1967 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Methods for Corrosion Testing of Aluminum Alloys written by Vinod S. Agarwala and published by ASTM International. This book was released on 1992 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluates the usefulness of the current standards on exfoliation and corrosion testing of aluminum alloys and their applicability to new requirements and advanced alloys. The 13 papers, from an international symposium in San Francisco, May 1990, discuss whether the existing standards should be revis
Download or read book Stress Corrosion Cracking in Wrought High Strength Aluminum Alloys written by Theodore Martin Swanson and published by . This book was released on 1949 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of Stress Corrosion Crack Growth in Al Zn Mg Alloys by the Double Torsion Method written by TL. Bond and published by . This book was released on 1984 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The double torsion test specimen was evaluated to determine if it was suitable for use in subcritical crack growth studies of ductile engineering alloys. Several attractive features of the double torsion specimen were observed, including a simple, crack-length-independent expression for stress intensity and the apparent retention of plane-strain conditions in relatively thin plate specimens. Use of the double torsion specimen to determine V-K curves for high-strength aluminum alloys in a chloride environment produced conventional two-stage growth, plateau velocities being slightly higher than those observed in similar tests using conventional plan strain specimens. The double torsion specimen appears attractive for subcritical crack growth studies under plane-strain conditions, particularly in the Stage II regime where crack velocities are not strongly dependent on stress intensity.
Download or read book Marine Atmosphere Stress Corrosion Tests on Precracked Specimens from High Strength Aluminum Alloys written by RC. Dorward and published by . This book was released on 1978 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stress corrosion tests on precracked double-cantilever beam specimens from 2000- and 7000-series aluminum alloys have been in progress for up to seven years at a marine-atmosphere exposure site near Daytona Beach, Fla. One of the most significant results of these tests concerns the effects of specimen self-loading (because of exfoliation and corrosion-product wedging) on the relative crack growth resistance of different alloys. Self-loading is apparently affected by copper content but is not limited to copper-bearing alloys. Copper-free alloy 7039-T64, for example, showed self-loading effects after 3 to 4 years' exposure. Naturally aged 2XXX alloys and peak-aged, copper-containing 7XXX alloys were most sensitive to self-loading, usually showing the effects within six months. However, cracks in 7075-T73, a stress corrosion resistant alloy, also continued to propagate at rates that were not insignificant after several years' exposure, whereas alloy 2024-T851 appeared more resistant to corrosion-product wedging than 7075-T73.
Download or read book Damage Based Assessment of Stress Corrosion Performances Among Aluminum Alloys written by RJ. Bucci and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: At Alcoa Laboratories the breaking load test was developed to provide a more discriminating accelerated laboratpry practice for rating stress corrosion cracking (SCC) performances of relatively resistant aluminum materials. The method involves residual strength measurements from tensile bar specimens previously exposed to sustained tensile stress in a corrosive medium. The degree of SCC degradation is measured by comparing the specimen postexposure strength with the original tensile strength (no exposure); the greater the strength loss, the more harmful the attack. In contrast to the more traditional pass/fail life testing approaches, the breaking load method enables numerical differentiation among materials and precludes long waiting periods for specimens to fail in the environment. In addition, the breaking load method provides descriptors amenable to flaw size and probabilistic fracture mechanics interpretations, thereby enabling expression of SCC ratings in meaningful terms of crack initiation and growth kinetics. Conventionally used descriptors of SCC behavior (e.g., time to failure, percent survival, threshold stress, KIscc) are influenced to varying degrees by both the strength and toughness of the test material and the conditions of the testing (e.g., specimen geometry and loading method). The damage-based evaluation of breaking load data is advantageous in that potential biases in SCC performance ratings caused by material property differences and specimen size effects can be normalized.
Download or read book Stress Corrosion Testing written by and published by . This book was released on 1967 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
