Effects of Friction Changing on Part Thickness in SPF of TC4 Alloy
In order to study the influence of the friction on the thickness distribution of part in superplastic forming, based on TC4 negative angle complex parts, the influence of low-die in single-direct SPF and up-die in direct-reverse SPF on thickness distribution was analyzed with MSC. and MARC. The influence of friction changing in different areas of up-die in direct-reverse SPF on the minimum thickness and the thickness distribution were analyzed with ANOVA and range analysis. The results show that the smaller of friction, the greater thinning of the negative wall thickness while the thickness of positive angle wall was opposite. In direct-reverse SPF, when the friction of low-die is fixed, as the friction coefficient of up-die increases, the minimum thickness of actual part increases accordingly. There are different effects on minimum thickness and thickness distribution as the friction in different areas of up-die in direct-reverse SPF changes. The thickness effect of the part is greater while the sheet contacts the die earlier.
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Document Type: Research Article
Publication date: June 15, 2015
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- Journal of Aeronautical Materials, founded in 1981, is sponsored by Chinese Society of Aeronautics and Astronautics, and edited and published by editiorial board of Journal of Aeronautical Materials,AVIC Beijing Institute of Aeronautical Material(BIAM).It has been indexed in Scopus (Holland), INSPEC (U.K.), AJ (Russia), CA (US) and UPD (US). Journal of Aeronutical Materials is devoted to reporting new and original experimental and theoretical basic research of aeronautical materials, such as composite design,technology,testing and charaacterizing, and so on.
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