This programm was part of an overall program to develop a high-strength steel, designated AF1410, which compares favorably with titanum in strength/weight efficiency and fatigue characteritics and yet can be produced at a significant reduction in cost. The Rockwell portion of the overall programm consisted of selecting existing candidate design, developing steel substitute designs, and comparing their estimated cost with their titanium counterparts. It also consisted of development of heat-treat processes to optimize machinability and of a comprehensive materials test program. Finally, the program included the machining of a fullscale test article from a forging provided by the Air Force from another portion of the programm, and the fatigue, damage tolerance, and static residual strength testing of the full-scale article. In addition, validation of the production cost reduction was a prime objective. During testing, cracks developed which were subsequently analyzed as being the result of excessive deflections. An in-test rerpair was accomplished, and the testing was successfully completed.
Lower cost by substituting steel for titanium
Geringere Kosten druch den Austausch von Titan durch Stahl
US Government Reports ; Nov ; 1-447
1978
447 Seiten
Report
Englisch
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