ECAE Processed Copper for Backward Extrusion of Micro Cups
碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 96 === This paper describes a micro backward extrusion process of cups using the fine-grained copper produced by equal channel angular extrusion (ECAE). Copper was first annealed, deformed by multi-pass ECAE at room temperature and heat treated to obtain a microstr...
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ndltd-TW-096KUAS07670442015-10-13T13:47:37Z http://ndltd.ncl.edu.tw/handle/08887592413589058797 ECAE Processed Copper for Backward Extrusion of Micro Cups 等徑轉角擠製純銅於逆向擠製微型圓杯之研究 Teng-Chiao Wang 王騰鉸 碩士 國立高雄應用科技大學 模具工程系碩士班 96 This paper describes a micro backward extrusion process of cups using the fine-grained copper produced by equal channel angular extrusion (ECAE). Copper was first annealed, deformed by multi-pass ECAE at room temperature and heat treated to obtain a microstructure with a grain size of about 2 microns. Microstructure was carefully examined and some mechanical properties including hardness and stress-strain relationship were also investigated. The results show that the hardness of copper was increased after the ECAE. Moreover, the ECAE processed copper has larger total strain than those from the annealed copper in the simple upsetting test. The fine-grained copper obtained by the ECAE was used in a micro backward extrusion process to produce the cups with the inner diameter of 3 mm and the wall thickness of 0.1 mm. A commercial package was also employed to simulate the process and the predicted shapes of cups were close to those from experiments. It was concluded that the ECAE processed copper provides better formability and edge quality in the micro backward extrusion of cups. Chao-Cheng Chang 張朝誠 2008 學位論文 ; thesis 102 zh-TW |
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碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 96 === This paper describes a micro backward extrusion process of cups using the fine-grained copper produced by equal channel angular extrusion (ECAE). Copper was first annealed, deformed by multi-pass ECAE at room temperature and heat treated to obtain a microstructure with a grain size of about 2 microns. Microstructure was carefully examined and some mechanical properties including hardness and stress-strain relationship were also investigated. The results show that the hardness of copper was increased after the ECAE. Moreover, the ECAE processed copper has larger total strain than those from the annealed copper in the simple upsetting test. The fine-grained copper obtained by the ECAE was used in a micro backward extrusion process to produce the cups with the inner diameter of 3 mm and the wall thickness of 0.1 mm. A commercial package was also employed to simulate the process and the predicted shapes of cups were close to those from experiments. It was concluded that the ECAE processed copper provides better formability and edge quality in the micro backward extrusion of cups.
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author2 |
Chao-Cheng Chang |
author_facet |
Chao-Cheng Chang Teng-Chiao Wang 王騰鉸 |
author |
Teng-Chiao Wang 王騰鉸 |
spellingShingle |
Teng-Chiao Wang 王騰鉸 ECAE Processed Copper for Backward Extrusion of Micro Cups |
author_sort |
Teng-Chiao Wang |
title |
ECAE Processed Copper for Backward Extrusion of Micro Cups |
title_short |
ECAE Processed Copper for Backward Extrusion of Micro Cups |
title_full |
ECAE Processed Copper for Backward Extrusion of Micro Cups |
title_fullStr |
ECAE Processed Copper for Backward Extrusion of Micro Cups |
title_full_unstemmed |
ECAE Processed Copper for Backward Extrusion of Micro Cups |
title_sort |
ecae processed copper for backward extrusion of micro cups |
publishDate |
2008 |
url |
http://ndltd.ncl.edu.tw/handle/08887592413589058797 |
work_keys_str_mv |
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