| 摘要(英) |
Abstract
Low pressure gas forming in the industry is an advantage, low pressure gas forming simply, is superplastic forming (SPF) or Quick Plastic Forming (QPF). However, their definitions or distinction together with their formability have not been stated or explained well. Most metals including aluminum alloy, can be either fine or coarse grained. This original microstructures together with specific forming conditions, i.e. temperature and strain rate, determine whether the sheet gas forming process is classified as a superplastic or a non-superplastic one. For this paper superplastic and non-superplastic 5083 aluminum alloy materials are different needs in the mold, comparing observed formability, but also for forming superplastic forming and quick plastic forming process both of compare, the results show superplastic forming for complex parts and forming more difficult, and in the shape of a simple mold having a thickness distribution of excellent faster than quick plastic forming, The results show superplastic forming for forming complex and more difficult parts, but in the shape of a simple mold thickness distribution is better than quick plastic forming, but this gas forming conditions more stringent, must be in compliance with the temperature (~ 500 ℃), strain rate (~ 10-3 ~ 10-4 S-1), more need to have enough space forming (mold design) and superplastic materials (fine-grained 5 ~ 10μm), in order to fully demonstrate the characteristics of superplastic forming, and in quick plastic forming, which forming the required lower temperature (~ 450 ℃), strain rate of ~ 10-2 S-1 , it’s than superplastic forming nearly 10 times faster, gas forming respectively represent two different needs, have their advantages and disadvantages as well as the importance.
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| 參考文獻 |
參考文獻
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