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http://dx.doi.org/10.5139/JKSAS.2009.37.12.1201

Evaluation of Formability of Copper Alloy for Regenerative Cooling Chamber before and after Heat Treatment  

Ryu, Chul-Sung (한국항공우주연구원 연소기팀)
Lee, Keum-Oh (한국항공우주연구원 연소기팀)
Choi, Hwan-Seok (한국항공우주연구원 연소기팀)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.12, 2009 , pp. 1201-1208 More about this Journal
Abstract
Dome stretching tests and tension tests were performed to evaluate the formability of a copper alloy used for manufacturing the regenerative cooling chamber. The test specimens were prepared to investigate the effect of heat treatment and direction of specimens on the formability. The test results show that forming limit values are increased by the heat treatment of the material but the variation of the forming limit values by manufacturing direction is negligible compared to the heat treatment effect, and forming limit values are also different according to the test methods. These results indicate that the high temperature heat treatment of the material before bulging is a very important process to deform the inner cylindrical structure of the regenerative cooling chamber into a nozzle shape by the bulging process without necking or fracture and the test methods also have a great effect on a evaluation of the formability. The forming limit diagram obtained in this study would be utilized to the design of regenerative cooling chamber nozzles.
Keywords
Forming Limit Diagram; Copper Alloy; Regenerative Cooling Chamber; Bulging;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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