Download or read book The Effects of Scratches and Shot Peening on the Fatigue Crack Growth of AL Alloy 2024 T3 written by Min Shao and published by . This book was released on 1995 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-03 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue and crack growth tests have been conducted on 4340 steel and 2024-T3 aluminum alloy, respectively, to assess the effects of shot peening on fatigue life and the effects of shot and laser peening on crack growth. Two current programs involving fixed and rotary-wing aircraft will not be using shot peened structures. Since the shot peening compressive residual stress depth is usually less than the 0.05-inch initial damage tolerance crack size, it is believed by some that shot peening should have no beneficial effects toward retarding crack growth. In this study cracks were initiated from an electronic-discharged machining flaw which was cycled to produce a fatigue crack of approximately 0.05-inches in length and then the specimens were peened. Test results showed that after peening the crack growth rates were noticeably slower when the cracks were fairly short for both the shot and laser peened specimens resulting in a crack growth life that was a factor of 2 to 4 times greater than the results of the average unpeened test. Once the cracks reached a length of approximately 0.1-inches the growth rates were about the same for the peened and unpeened specimens. Fatigue tests on 4340 steel showed that the endurance limit of a test specimen with a 0.002-inch-deep machining-like scratch was reduced by approximately 40 percent. However, if the "scratched" specimen was shot peened after inserting the scratch, the fatigue life returned to almost 100 percent of the unflawed specimens original fatigue life. Everett, R. A., Jr. and Matthews, W. T. and Prabhakaran, R. and Newman, J. C., Jr. and Dubberly, M. J. Langley Research Center NASA/TM-2001-210843, NAS 1.15:210843, ARL-TR-2363, L-18065

Download or read book The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel written by and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Shot and Laser Peening on Fatigue Life and Crack Growth in 2024 Aluminum Alloy and 4340 Steel written by and published by . This book was released on 2001 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Cycle Fatigue of Structural Materials written by W. O. Soboyejo and published by Minerals, Metals, & Materials Society. This book was released on 1997 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examining underlying mechanisms governing the high-cycle fatigue behavior of structural materials, this book from Materials Week '97 focuses on the high-cycle fatigue behavior of existing aluminum, nickel, and titanium-base alloys. Mechanical and empirical approaches to the assessment of environment and temperature effects are examined, along with probable approaches for the prediction of high-cycle fatigue behavior under both uniaxial and multiaxial stresses.

Download or read book The Effect of Scratches on the Fatigue Life and Fatigue Crack Growth of AL 2024 T3 CLAD written by Nader Nader and published by . This book was released on 1993 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Overload and Underload Effects on the Fatigue Crack Growth Behavior of the 2024 T3 Aluminum Alloy written by and published by . This book was released on 1997 with total page 14 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 1999-04 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Shot peening on Fatigue Crack Growth Behavior of the 7475 T7351 Aluminum Alloy written by Julien Le Vely and published by . This book was released on 2001 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Environment on Fatigue Crack Propagation in 2024 T3 Aluminum Alloy written by David Michael Lovell and published by . This book was released on 1968 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Crack Propagation in 2024 T3 and 7075 T6 Aluminum Alloys at High Stresses written by Robert G. Dubensky and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Overload and Underload Effects on the Fatigue Crack Growth Behavior of the 2024 T3 Aluminum Alloy written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-29 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack growth tests were conducted on 0.09 inch thick, 3.0 inch wide middle-crack tension specimens cut from sheets of 2024-T3 aluminum alloy. The tests were conducted using a load sequence that consisted of a single block of 2,500 cycles of constant amplitude loading followed by an overload/underload combination. The largest fatigue crack growth life occurred for the tests with the overload stress equal to 2 times the constant amplitude stress and the underload stress equal to the constant amplitude minimum stress. For the tests with compressive underloads, the fatigue crack growth life decreased with increasing compressive underload stress. Dawicke, David S. Langley Research Center NASA-CR-201668, NAS 1.26:201668 NAS1-96014; RTOP 538-02-10-01...

Download or read book Threshold Fatigue Crack Growth for Aluminum Alloy 2024 T3 written by Peter Hudulak and published by . This book was released on 1981 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The effect of multiple overloads on fatigue crack propagation in 2024 T3 aluminum alloy written by Victor W. Trebules (Jr) and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Shot Peening on Fatigue Crack Propagation in 7075 T7351 Aluminum Alloy SENB Specimens written by Thomas Pettit Munson and published by . This book was released on 2004 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Overload Cycle S on Subsequent Fatigue Crack Propagation in 2024 T3 Aluminum Alloy written by Eric F. J. Von Euw and published by . This book was released on 1971 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: