Effect of Humidity on Fatigue Strength of Squeeze Cast Al Alloy

Y. Sofuku; Norio Kawagoishi; M. Adachi; K. Okutani; Y. Maeda

doi:10.4028/www.scientific.net/KEM.385-387.397

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 385-387Effect of Humidity on Fatigue Strength of Squeeze...

Effect of Humidity on Fatigue Strength of Squeeze Cast Al Alloy

Abstract:

Fatigue properties of a squeeze cast Al-Si-Mg alloy were examined under rotating bending and the effect of humidity on the crack initiation and propagation behavior was investigated in controlled humidity. The fatigue strength was decreased in high humidity (RH85%) in comparison with the one in low humidity (RH25%). Cracks initiated at the early stage of fatigue life from slip bands and eutectic Si particles in many cases and partially casting defects, and most of fatigue life was occupied by the growth life of a small crack regardless of humidity. The propagation of a crack were promoted by humidity, especially the growth rate of a crack larger than about 100 µm, which propagated in tensile mode, was strongly accelerated.

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Periodical:

Key Engineering Materials (Volumes 385-387)

Pages:

397-400

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.385-387.397

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Online since:

July 2008

Authors:

Y. Sofuku, Norio Kawagoishi, M. Adachi, K. Okutani, Y. Maeda

Keywords:

Aluminium Alloy, Crack Initiation, Crack Propagation, Fatigue, Humidity, Squeeze Cast

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References

[1] N. Kawagoishi, H. Nisitani and T. Tsuno, Trans. Japan Soc. Mech. Eng., Vol. 55 (1989), p.1733.

Google Scholar

[2] M. Adachi, Y. Waku, H. Iwai, T. Nishi and A. Yoshida, Jour. of Japan Institute of Light Metals, Vol. 39 (1989), p.487.

Google Scholar

[3] Nisitani, Mechanics of Fatigue, ASME-AMD, Vol. 47, edited by T. Mura (1981), p.151.

Google Scholar

[4] N. Kawagoishi, H. Nisitani, T. Toyohiro, N. Yamamoto and T. Tsuno, Trans. Japan Soc. Mech. Eng., Vol. 60 (1994), p.358.

Google Scholar

[5] J.A. Dunsby and W. Wiebe, Mater. Research Standard, Vol. 8 (1969), p.15.

Google Scholar

[6] Haftirman, S. Hattori and T. Okada, Trans. Japan Soc. Mech. Eng., Vol. 62 (1996), p.1140 Fig. 7 Fracture surfaces (σa=220MPa, Nf=3. 1×104cycles) (a) RH25% (b) RH85% (σa=200MPa, Nf=7. 9×104cycles).

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