Effect of multiaxial stress on deformation characteristics of 8090 superplastic aluminum alloy

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Title:	Effect of multiaxial stress on deformation characteristics of 8090 superplastic aluminum alloy
Authors:	吳泓瑜 Wu, Horng-yu
Contributors:	機械工程學系 Mechanical Engineering
Keywords:	超塑性成形;超塑性鋁合金;空孔狀態;金屬流 Superplastic forming;Superlastic aluminum alloy;Cavitation;Metal flow
Date:	2004
Issue Date:	2014-06-27 02:45:33 (UTC+8)
Abstract:	本論文是以視定塑性力學法探討8090鋁鋰合金在多軸應力狀態下之超塑性成形特性。利用不同成形階段之試件，研究在成形過程中，試件的變形狀態、試件厚度分佈及局部應變速率等之情形。實驗結果顯示，柱狀杯形零件在超塑性成形過程中，應該分為變形板片觸底前及觸底後兩個不同階段來探討其變形特性。成形試件中之空孔狀態，除了受到成形速率的影響外，試件較先貼模的部分，空孔量可能因為產生燒結作用造成空孔收縮的現象，而最後導致空孔量的減少。 Effect of multi-axial stress on deformation characteristics of a superplastic aluminum alloy 8090 was studied by use of Visioplasticity in this work. Several interrupted tests were performed to bulge the sheets to various depths for different strain rates
Appears in Collections:	[Department of Mechanical Engineering] Journal Articles

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