Effect of Fe Particle on the Surface Peeling in Cu-Fe-P Lead Frame

Under the surface peeling of Cu- Fe- P lead frame alloy larger Fe particles were observed by energy dispersive spectroscopy. By using the large strain two-dinension plane strain model and elastic plastic finite element method, the cause for peeling damage of Cu-Fe-P lead frame aUoy was investigated....

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2006-09, Vol.21 (3), p.18-20
Main Authors: Juanhua, Su, Ping, Liu, Qiming, Dong, Hejun, Li, Baohong, Tian
Format: Article
Language:English
Subjects:
Atoms & subatomic particles
Finite element analysis
Studies
等效应力
等效应变
表面剥离
铜铁磷合金
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Summary:Under the surface peeling of Cu- Fe- P lead frame alloy larger Fe particles were observed by energy dispersive spectroscopy. By using the large strain two-dinension plane strain model and elastic plastic finite element method, the cause for peeling damage of Cu-Fe-P lead frame aUoy was investigated. The results show that when the content of Fe particles is more than 30% at local Fe-rich area the intense stress coacentration in the Fe particle would make the Fe particle broken up. The high equivalent stress mutation and the mismatch of equivalent strain 10% at the two sides of intefrace make it easy to develop the crack and peeling damage on finish rolling. The larger Fe particles in the Cu-Fe-P alloy should be avoided.
ISSN:1000-2413
1993-0437
DOI:10.1007/BF02840870