Effect of Dispersoids on Softening Behavior in Cu-Fe-P Alloys for Lead Frames

Yasuhiro Aruga; Naohiro Hara; Katsura Kajihara

doi:10.4028/www.scientific.net/MSF.539-543.2258

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HomeMaterials Science ForumMaterials Science Forum Vols. 539-543Effect of Dispersoids on Softening Behavior in...

Effect of Dispersoids on Softening Behavior in Cu-Fe-P Alloys for Lead Frames

Abstract:

The effect of the amount of dispersoids on softening behavior and recrystallized microstructure of Cu-Fe-P alloy was examined by the extracted residue analysis method. The degrees of contribution of larger particles (larger than 1μm in an average diameter) and smaller ones (less than 0.1μm) to the softening behavior were considered in the quantitative aspect, respectively. It was found that the change of the order of 10-1mass% in the amounts of both particles has a great effect on softening behavior. The difference in the amount of fine particles changes recrystallized grain size distributions at similar hardness. In the specimen with a small amount of fine particles, coarse grains and wide distribution of grain size were observed after annealing. As a result, it was revealed that fine and homogeneous recrystallized microstructure was obtained due to just 0.35mass% of fine partcles, even if the amount of large particles increased.

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Materials Science Forum (Volumes 539-543)

Pages:

2258-2263

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.2258

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Online since:

March 2007

Authors:

Yasuhiro Aruga, Naohiro Hara, Katsura Kajihara

Keywords:

Cu Alloy, Dispersoid, Extracted Residue, Particle, Recrystallization, Softening Behaviour

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References

[1] G. Miuma, S. Hori, S. Saji and Y. Tominaga: J. Japan Inst. Metals Vol. 33 (1969), p.521.

Google Scholar

[2] S. Hori and S. Saji: Journal of the JCBRA Vol. 9 (1970), p.201.

Google Scholar

[3] S. Hori and S. Saji: Journal of the JCBRA Vol. 11 (1972), p.166.

Google Scholar

[4] T. Takahashi, A. Kamio, Y. Murakami, H. Tezuka and S. Nagata: Journal of the JCBRA Vol. 16 (1977), p.73.

Google Scholar

[5] T. Takahashi, A. Kamio, Y. Murakami, H. Tezuka and S. Nagata: Journal of the JCBRA Vol. 17 (1978), p.82.

Google Scholar

[6] T. Osako, K. Yokozawa, K. Kazama and K. Suzuki: Journal of the JCBRA Vol. 28 (1989), p.133.

Google Scholar

[7] K. Kita, K. Kobayashi and R. Monzen: J. Soc. Mat. Sci. Japan Vol. 49 (2000), p.482.

Google Scholar

[8] Y. Aruga, K. Kajihara and N. Hara: Journal of the JRICu Vol. 43 (2004), p.74.

Google Scholar

[9] For example, H. Saka: Electron Microscopy of Crystallography (Uchida Rokakuho Publishing, Japan 1997).

Google Scholar

[10] F.J. Humphreys: Acta Metall. Vol. 25 (1977), p.1323.

Google Scholar

[11] C. S. Smith: Trans. Metall. Soc. AIME Vol. 175 (1948), p.15 1μm1μm1μm Fig. 9. TEM micrographs of specimen No. 2 annealed at 773K for 20s. A B C D 1μm1μm1μm Fig. 9. TEM micrographs of specimen No. 2 annealed at 773K for 20s. A B C D.

Google Scholar