Plane Strain Fracture Toughness and Mechanical Properties of 5a1-2.5sn Eli Titanium at Room and Cryogenic Temperatures PDF Download
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Author: Carl M. CARMAN
Publisher:
ISBN:
Category :
Languages : en
Pages : 64
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Book Description
The suitability of 5Al-2.5Sn ELI titanium alloy for cryogenic tankage applications was studied by determining the mechanical and fracture properties of the material at testing temperatures ranging from room temperature to -423F. Small round tensile specimens were developed to measure the tensile properties over the range of testing temperatures. Plane strain fracture toughness measurements were also made at these temperatures using the 'pop-in' technique with a small notched bend specimen. Special laboratory techniques were developed to test the specimens at -423F, utilizing the specific heat of vaporization of liquid helium. The degree of preferred orientation in this alloy was qualitatively studied by determining the ratio of the width strain to the thickness strain. The fracture toughness values were interpreted in terms of the crystallography and mechanism of deformation of titanium. The data are summarized in terms of a part-through defect which will be stable at various operating temperatures and stress levels. It has been shown that texture hardening may be used to obtain high burst stresses under biaxial stress conditions. (Author).
Author: Carl M. CARMAN
Publisher:
ISBN:
Category :
Languages : en
Pages : 64
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Book Description
The suitability of 5Al-2.5Sn ELI titanium alloy for cryogenic tankage applications was studied by determining the mechanical and fracture properties of the material at testing temperatures ranging from room temperature to -423F. Small round tensile specimens were developed to measure the tensile properties over the range of testing temperatures. Plane strain fracture toughness measurements were also made at these temperatures using the 'pop-in' technique with a small notched bend specimen. Special laboratory techniques were developed to test the specimens at -423F, utilizing the specific heat of vaporization of liquid helium. The degree of preferred orientation in this alloy was qualitatively studied by determining the ratio of the width strain to the thickness strain. The fracture toughness values were interpreted in terms of the crystallography and mechanism of deformation of titanium. The data are summarized in terms of a part-through defect which will be stable at various operating temperatures and stress levels. It has been shown that texture hardening may be used to obtain high burst stresses under biaxial stress conditions. (Author).
Author: CM. Carman
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 21
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Book Description
An investigation was performed to determine the engineering properties and plane strain fracture toughness characteristics at cryogenic temperatures for 1⁄4, 1⁄2, and 1-in.-thick plates of 5Al-2.5Sn ELI (extra low interstitial) and commercial grade titanium alloys. These results were then translated into design information data applicable to liquid-fueled rocket booster tanks for service at -320 and -423 F. The tensile properties of these materials were determined at room temperature, -110 F, -320 F, and -423 F using small round tension specimens. The plane strain fracture toughness was determined using an instrumented precracked bend specimen. The dimensions of these specimens were such that the criterion (crack length and specimen thickness are equal to 2.5 (KIc/?ys)2) was met at testing temperatures of -320 and -423 F. These data may be considered valid values of plane strain fracture toughness. The commercial 5Al-2.5Sn titanium alloy gave values of KIc of approximately 25,000 and 24,000 psi ? in. at testing temperatures of -320 and -423 F, respectively. On the other hand, the 5Al-2.5Sn ELI titanium alloy gave values of KIc of 65,000 and 55,000 psi ?in. at these testing temperatures, respectively. These data show a superiority of approximately 1.5 in terms of critical crack size for the ELI grade. The relative level of texture hardening in this material was estimated by measuring the R values of these plates. The predicted biaxial yield strength of tanks fabricated from this material was compared with experimental data.
Author: C. M. Carman
Publisher:
ISBN:
Category : Aluminum alloys
Languages : en
Pages : 16
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Author: Timothy L. Sullivan
Publisher:
ISBN:
Category : Titanium alloys
Languages : en
Pages : 44
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Author: Daniel Paul Dennies
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
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Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 304
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Author:
Publisher: ASTM International
ISBN:
Category : Metals
Languages : en
Pages : 92
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Author: Kaufman JG.
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 88
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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: R. H. VanStone
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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