Plane Strain Fracture Toughness of Aluminum Alloys at Room and Subzero Temperatures PDF Download
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Author: JG. Kaufman
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 13
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Book Description
Plane strain fracture toughness tests have been made at room temperature, -112, and -320 F on plates of six aluminum alloys and tempers: 2014-T651, 2024-T851, 6061-T651, 7075-T651, 7075-T7351, and 7079-T651. The data indicate that the plane strain fracture toughness, KIc, of each of the alloys at the subzero temperatures is as high as or higher than that at room temperature. At -320 F apparently valid values of KIc ranged from 4 (7075-T7351) to 23 percent (2014-T651 and 7075-T651 ) higher than at room temperature. An even larger difference was indicated for 6061-T651 (about 40 percent higher), but the specimens tested at -320 F were not thick enough to satisfy the requirements of ASTM Test E 399 - 70 T. For the alloys of most interest for cryogenic applications, 2014-T651 and 6061-T651, the critical crack sizes at cryogenic temperatures are indicated to be as large as or larger than those at room temperature when evaluated at either a fixed operating stress or a constant percentage of the yield strength.
Author: JG. Kaufman
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 13
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Book Description
Plane strain fracture toughness tests have been made at room temperature, -112, and -320 F on plates of six aluminum alloys and tempers: 2014-T651, 2024-T851, 6061-T651, 7075-T651, 7075-T7351, and 7079-T651. The data indicate that the plane strain fracture toughness, KIc, of each of the alloys at the subzero temperatures is as high as or higher than that at room temperature. At -320 F apparently valid values of KIc ranged from 4 (7075-T7351) to 23 percent (2014-T651 and 7075-T651 ) higher than at room temperature. An even larger difference was indicated for 6061-T651 (about 40 percent higher), but the specimens tested at -320 F were not thick enough to satisfy the requirements of ASTM Test E 399 - 70 T. For the alloys of most interest for cryogenic applications, 2014-T651 and 6061-T651, the critical crack sizes at cryogenic temperatures are indicated to be as large as or larger than those at room temperature when evaluated at either a fixed operating stress or a constant percentage of the yield strength.
Author:
Publisher: ASTM International
ISBN:
Category : Metals
Languages : en
Pages : 92
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Author: EA. Steigerwald
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 24
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Book Description
An investigation was conducted to measure the plane strain fracture toughness, KIc, of eight potential cryogenic service alloys at 75, -100, and -321 F. The test materials included 7039-T61 and 2021-T81 aluminum alloys, Ti-6Al-4V STA in both alpha+beta and beta processed conditions, and the following steels: ASTM A553-A, PH 13-8Mo (H 1150-M), HP 9-4-20, and 18Ni (200 grade) maraging.
Author: John Gilbert Kaufman
Publisher: ASM International
ISBN: 1615030611
Category : Technology & Engineering
Languages : en
Pages : 235
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Book Description
Annotation Kaufman prevents this summary of data on the fracture characteristics of aluminum alloys, broadly based on a publication by Alcoa in 1964, Fracture Characteristics of Aluminum Alloys. Coverage includes tensile properties as indicators of fracture behavior; notched-bar impact and related tests for toughness; notch toughness and sensitivity; tear resistance; fracture toughness; the interrelation of fracture characteristics; toughness at subzero and elevated temperatures; subcritical crack growth; and metallurgical considerations in fracture resistance. Most of the data is presented in only the English/engineering units, contrary to normal ASM International and Aluminum Association, Inc. policies. The author's credentials are not stated. c. Book News Inc
Author: Kaufman JG.
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 88
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Author: Carl M. CARMAN
Publisher:
ISBN:
Category :
Languages : en
Pages : 40
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Book Description
The tensile properties and plane strain fracture toughness of 1/2 and 1 inch thick 2219-T87 aluminum alloy were determined as a function of testing at temperatures from room to -423 F. The tensile and yield strengths of this material show a gradual increase as the testing temperature is decreased to -423 F while the elongation and reduction of area remain essentially unchanged. The plane strain fracture toughness of this material is relatively insensitive to testing temperature and shows only a slight increase with decreasing testing temperature. Specimens machined so that the crack propagation is perpendicular to the rolling plane show somewhat higher values of plane strain fracture toughness than when crack propagation is parallel to the rolling plane. The plane strain fracture toughness of the 1 inch thick 2219-T87 aluminum alloy was somewhat lower than that of the 1/2 inch thick plate. Illustrative examples are presented on using these parameters in design. (Author).
Author: James Edward Campbell
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 36
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Book Description
The report contains the first compilation of available Plane-strain fracture toughness data and is the result of considerable interest during the past few years in developing test methods for obtaining these data. The report is divided into sections on aluminum alloys, high-strength alloy steels, intermediate- and low-strength steels, precipitation-hardening stainless steels, titanium alloys, nickel-base alloy 718, and beryllium.
Author: Peter John Guest
Publisher:
ISBN:
Category :
Languages : en
Pages : 136
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Author: John Gilbert Kaufman
Publisher: ASM International
ISBN: 1615031162
Category : Technology & Engineering
Languages : en
Pages : 569
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Book Description
A compilation of data collected and maintained for many years as the property of a large aluminum company, which decided in 1997 to make it available to other engineers and materials specialists. In tabular form, presents data on the tensile and creep properties of eight species of wrought alloys and five species of cast alloys in the various shapes used in applications. Then looks at the fatigue data for several alloys under a range of conditions and loads. The data represent the typical or average findings, and though some were developed years ago, the collection is the largest and most detailed available. There is no index.
Author:
Publisher:
ISBN:
Category : Alloys
Languages : en
Pages : 606
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Book Description
