Browse > Article
http://dx.doi.org/10.5228/KSTP.2012.21.7.447

A Study on Forming of Al-Zn-Mg-Sc Aluminum Alloy Bolts  

Yoon, D.J. (한국생산기술연구원)
Hahm, S.Y. (한국교육과정평가원)
Lee, Y.S. (국민대학교)
Publication Information
Transactions of Materials Processing / v.21, no.7, 2012 , pp. 447-452 More about this Journal
Abstract
This paper is concerned with forming of Al-Zn-Mg-Sc aluminum alloy bolts, focusing on the effects of heat treatment and age-hardening on the formability and ductile damage evolution. Both experimental and finite element studies were performed. From the experiments, it is observed that the heat treatment or the normalization of Al-Zn-Mg-Sc aluminum alloy increases its formability dramatically resulting in successful bolt forming, while the effects of age-hardening at room temperature on the stress-strain relationship and formability are not very critical. Deformation characteristics such as distribution of effective stress and strain, material flow, and ductile damage evolution during bolt forming are examined using a commercial finite element package, Deform-2D. It should be noted that the extrusion load predicted by the finite element method matches well the experiment results. The finite element predictions on the deformation characteristics support the experimental observations such as fracture of bolt head flange, material flow, and distribution of hardness.
Keywords
Al-Zn-Mg Aluminum Alloy; Bolt Forming; Finite Element Method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 H. Sakurai, 2008, Recent Tendency of Al Forging in Japan, Trans. of Mater. Process., Vol. 17, No 8, pp 550-557.   DOI
2 R. Narayanasamy, K. Baskaran, D. Muralikrishna, 2008, Some Studies on Stresses and Strains of Al Alloy during Extrusion-forging at Room Temperature, Mater. Des., Vol. 29, No. 8, pp. 1623-1632.   DOI
3 N. Y. Kim, J. H. Kim, J. H Kim, J. T. Yeom, D. G. Lee, S. G. Lim, N. K. Park, 2006, Effect of Processing Condition on the Hot Extrusion of Al-Zn-Mg-Sc Alloy, Trans. Mater. Process., Vol. 15, No. 2, pp. 143-147.   과학기술학회마을   DOI
4 D. J. Yoon, E. Z. Kim, S. Lee, Y. S. Lee, S. H. Yoon, 2008, KSPE Spring Meeting, Kor. Soc. Precis. Eng., Seoul, Korea, pp. 903-904.
5 D. J. Yoon, E. Z. Kim, S. Lee, S. H. Yoon, Y. S. Lee, 2009, KSPE Spring Meeting, Kor. Soc. Precis. Eng., Seoul, Korea, pp. 649-650.