Structural Response of Beryllium Sheet Produced by Three Fabrication Methods PDF Download
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Author: C. J. Giemza Publisher: ISBN: Category : Beryllium Languages : en Pages : 62
Book Description
Hot-pressed, hot-upset and hot cross-rolled Be sheets were examined to assess their differences and advantages from a structural design viewpoint. Tension, notch tension, compression, bend ductility and box-beam tests, with the main emphasis on factors which tend to embrittle Be, were conducted. The results showed that hot cross-rolled Be sheet exhibited both high strength and high elongation in tensile tests but was relatively brittle when, as in bending, the stress was complex. Hot-pressed Be sheet, which was low in tensile strength and elongation, demonstrated an excellent capacity for accommodating complex stresses in bending without fracture. The hot-upset Be sheet exhibited the best characteristics possessed by both hot-pressed and hot cross-rolled Be, though to a lesser degree than the optimum of each. The differences in mechanical behavior among the 3 groups were apparently a function of the degree of preferred orientation. However, the amounts of impurity elements which were reported could have contributed significantly to the embrittlement of the hot- pressed and hot cross-rolled Be sheet.
Author: C. J. Giemza Publisher: ISBN: Category : Beryllium Languages : en Pages : 62
Book Description
Hot-pressed, hot-upset and hot cross-rolled Be sheets were examined to assess their differences and advantages from a structural design viewpoint. Tension, notch tension, compression, bend ductility and box-beam tests, with the main emphasis on factors which tend to embrittle Be, were conducted. The results showed that hot cross-rolled Be sheet exhibited both high strength and high elongation in tensile tests but was relatively brittle when, as in bending, the stress was complex. Hot-pressed Be sheet, which was low in tensile strength and elongation, demonstrated an excellent capacity for accommodating complex stresses in bending without fracture. The hot-upset Be sheet exhibited the best characteristics possessed by both hot-pressed and hot cross-rolled Be, though to a lesser degree than the optimum of each. The differences in mechanical behavior among the 3 groups were apparently a function of the degree of preferred orientation. However, the amounts of impurity elements which were reported could have contributed significantly to the embrittlement of the hot- pressed and hot cross-rolled Be sheet.
Author: United States. Department of Commerce. Office of Technical Services Publisher: ISBN: Category : Government publications Languages : en Pages : 522
Author: United States. Department of Commerce. Office of Technical Services Publisher: ISBN: Category : Government publications Languages : en Pages : 990
Author: James N. Krusos Publisher: ISBN: Category : Beryllium Languages : en Pages : 336
Book Description
The methods developed for fabrication of Be sheet composite structures are described. Descriptions and performance evaluation are included for a variety of panels fabricated under the contract consisting of Be load bearing panels and porous ceramic heat shields developed to withstand temperatures in excess of 3000 F. Concepts are outlin d defining application of Be-ceramic composites to aerospace vehicle structures. Be sheet fabrication methods and tooling are described and include such processes as cutting, forming, chem-milling, and brazing. Be sheet faces were brazed to a variety of superalloy and stainless steel honeycomb cores. Three basic porous ceramic foams were developed in the heat shield: Al2O3, ZrO2, and SiO2. (Author).
Author: C. J. Giemza
Author: C. J. Giemza
Author: United States. National Aeronautics and Space Administration
Author: 
Author: 
Author: United States. Department of Commerce. Office of Technical Services
Author: United States. National Aeronautics and Space Administration
Author: United States. Department of Commerce. Office of Technical Services
Author: 
Author: 
Author: James N. Krusos