Paper Titles
Micro-Indentation of Metal Matrix Composite - An FEM Investigation
p.563
Plasticity Characteristics of Beta Titanium Alloy Obtained Using Depth-Sensing Nano-Indentation Test
p.571
A Numerical and Experimental Analysis on the Forming Limit of AA 3105 Aluminum Alloy in Radial Extrusion Process
p.577
Formability Evaluation of Coated and Uncoated Steel Sheets with Consideration of Frictional Characteristics
p.581
Effect of the Surface Defects on Hydroformability of Aluminum Alloys
p.587
Preform Design for Formability Enhancement of Tube Hydroforming Process Using Deformation History
p.593
Formability of Al6061 Extruded Tube in Warm Hydroforming
p.599
Formability of Roll Cast Recycled Aluminum Alloy
p.605
Computer Aided Simulation of the Rheology Forging Process for Aluminum Alloys and its Experimental Investigation
p.611

Effect of the Surface Defects on Hydroformability of Aluminum Alloys

Article Preview

Abstract:

Extruded aluminum alloys, which are highly versatile, have relatively modest prototyping cost, good strength and corrosion resistance. Because there is no weld seam, the circumferential mechanical properties may be uniform and advantageous for hydroforming. However, surface defects such as die lines and pick-up can be generated during the extrusion especially due to imperfections on the die surface. In this study, the extent of the crack propagation caused by die lines is evaluated according to the deformed shape of the tube in hydroforming process. And when forming a extruded aluminum tube, the deformed surface of the tube frequently becomes rougher with increasing plastic strain. This is well known as orange peel phenomenon and it has a significantly effect not only on the surface quality of a final product but also on the forming limit. To evaluate the effects of the orange peel on the hydroformability, the inter-stage polishing has been performed. Through the several tests including hydroforming test, the effect of surface defects on the hydroformabilities are well defined.

You might also be interested in these eBooks
Engineering Plasticity and Its Applications View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

587-592

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.587

Citation:

Cite this paper

Online since:

June 2007

Authors:

B.J. Kim, K.H. Choi, K.S. Park, Chester J. van Tyne, Young Hoon Moon

Keywords:

AA6061 Aluminum Alloy, Die Lines, Formability, Hydroforming, Orange Peel, Surface Defect

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] S.Z. Qamar, A.F.M. Arif and A.K. Sheikh: Material Manufacturing Processes, Vol. 19, No. 3(2004), p.391.

Google Scholar

[2] B.J. Kim, K.S. Park, J.S. Ryu and Y.H. Moon: Mater. Sci. Forum Vol. 475-479 (2005), p.4215.

Google Scholar

[3] W. Tong, L.G. Hector, Jr., H. Weiland and L.F. Wieserman: Scripta Materialia, Vol. 36, No. 11(1997), p.1339.

Google Scholar

[4] K. Yamaguchi, N. Takakura and S. Imatani: Journal of Materials Processing Technology, Vol 48(1995), p.27.

Google Scholar

[5] S. Gourdet, F. Montheillet: Materials Science & Engineering, Vol. 283(2000), p.274.

Google Scholar

[6] I. Sagalowicz, G. Hug, D. Bechet, P. Sain: in Aluminum alloys: their physical and mechanical properties, Vol. 1(1994), p.393, p.335, p.241.

Google Scholar

[7] Lihui Lang, Shijian Yuanm Xiaosong Wang, Z. R. Wang, Zhuang Fu, J. Danckert, K.B. Nielsen: Journal of Materials Processing Technology, Vol 146(2004), p.377.

Google Scholar