Tensile Properties of Bare-rolled Ingot-sheet Beryllium from Room Temperature to 800$sup 0$C. PDF Download
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Languages : en
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Book Description
Tensile properties of bare-rolled ingot-sheet beryllium from room temperature to 800 deg C are reported. While strength values show a steady decrease above room temperature, tensile elongations exhibit peaks at approximately 300 and 700 deg C. The strainhardening exponent varies with temperature and amount of strain, and ranges between approximately 0.10 and 0.26. Metallographic examinations reveal cleavage fracture at the lower temperatures, accompanied by severe grain deformation above room temperature. This is followed by a temperature range in which ductile rupture occurs, and finally, at the higher temperatures, grainboundary failure. The low BeO content of this material and the post-rolling heat treatment given to the sheet are factors which improve the high-temperature ductility as compared to other grades of beryllium. (auth).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Tensile properties of bare-rolled ingot-sheet beryllium from room temperature to 800 deg C are reported. While strength values show a steady decrease above room temperature, tensile elongations exhibit peaks at approximately 300 and 700 deg C. The strainhardening exponent varies with temperature and amount of strain, and ranges between approximately 0.10 and 0.26. Metallographic examinations reveal cleavage fracture at the lower temperatures, accompanied by severe grain deformation above room temperature. This is followed by a temperature range in which ductile rupture occurs, and finally, at the higher temperatures, grainboundary failure. The low BeO content of this material and the post-rolling heat treatment given to the sheet are factors which improve the high-temperature ductility as compared to other grades of beryllium. (auth).
Author: Stanley W. Porembka
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Category : Beryllium
Languages : en
Pages : 14
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This memorandum deals with the fabrication of beryllium ingot sheet. Until recently, most beryllium products have been fabricated from hot-pressed powder materials. As a result of the development of sound castings of beryllium of sufficient size, beryllium ingot sheet can now be made. The greatest advantage of sheet from cast ingots as compared with sheet from pressed powder is increased formability. However, ingot sheet has lower strength, and work is underway to improve the strength without serious loss of fabricability. The purpose of this summary is to review the casting and fabrication procedures for beryllium ingot and the resulting properties of sheet materials. (Author).
Author: Stanley Beitscher
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ISBN:
Category : Beryllium
Languages : en
Pages : 20
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