none

• Main Authors: Hsiao-chien Chang, 張小千
• Other Authors: Teng-shih Shih
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/60507408545783870625

碩士 === 國立中央大學 === 機械工程學系在職專班 === 102 === This study investigated the forming performance of 7075-T4 Aluminum alloy plate under the 100oC、150oC、200oC warm states. An experimental system of the electrical chemical etching method, hhydraulic presses for sheet metal formability tests, and deforming grids strain measurements are used to carry out the 7075-T4 aluminum alloy sheet forming limit diagram in a hot state (Forming Limit Diagram, FLD). Results show that the7075-T4 aluminum alloy sheet forming limit temperature obviously affects, and the formability rises apparently as temperatures rise, and at 100oC~150oc aluminum alloy sheet is most sensitive to temperature changes and the forming performance improves significantly. In addition, based on the Vickers hardness tests and metallographic observation of micro-structure, this study investigated the causes of formability differences as the temperature, and then established formability analysis and verification of test results.