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X-ray Fractographic Study on Fracture Surface of New Light Metal

Published online by Cambridge University Press:  06 March 2019

Hideaki Matsuoka ,
Yukio Hirose ,
Shigenobu Takahashi ,
Zenjiro Yajima  and
Yoichi Kishi
Hideaki Matsuoka
Affiliation:
Department of Materials Science and Engineering Kanazawa University, Kakuma-machi, Kanazawa 920-11, Japan
Yukio Hirose
Affiliation:
Department of Materials Science and Engineering Kanazawa University, Kakuma-machi, Kanazawa 920-11, Japan
Shigenobu Takahashi
Affiliation:
Department of Materials Science and Engineering Kanazawa University, Kakuma-machi, Kanazawa 920-11, Japan
Zenjiro Yajima
Affiliation:
Department of Mechanical Engineering, Kanazawa Institute of Technology Oogigaoka, Nonoichi, Kanazawa 921, Japan
Yoichi Kishi
Affiliation:
Material Research and Testing Center, Nippon Institute of Technology Miyashiro-machi, Saitama 345, Japan
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Abstract

New materials in the Al-Zn-Mg-Cu-La alloy system have been proposed for improving corrosion resistance in a study by Kishi et al, because Lanthanum, La, has a storage capability for hydrogen. Hydrogen is a problem in the stress corrosion cracking (SCC) growth mechanism. Zinc, Zn, Magnesium, Mg, and Copper, Cu, in the alloy have influenced the extrusion, strength and other properties; however, in the case of putting this material to use, it is also necessary to evaluate it from the viewpoint of fracture mechanics. The stress intensity factor, K, obtained from fracture mechanics is a necessary parameter for the evaluation of various materials.

The first part of this study deals with the measurement of fatigue crack growth in the Al-Zn-Mg-Cu-La alloy system. The second part evaluates the fracture surface obtained from tests of these materials by the application of x-ray fractography.

Type
V. Residual Stress, Crystallite Size and rms Strain Determination by Diffraction Methods
Information
Advances in X-Ray Analysis , Volume 38: Forty-third Annual Conference on Applications of X-ray Analysis , 1994 , pp. 435 - 442
Copyright
Copyright © International Centre for Diffraction Data 1994

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References

1. Kishi, Y., Hirose, Y., Tsukuda, I., Nagai, S. and Higashi, K., The Effect of Cr, Mn and Mg Content on the Tensile Properties and SCC Resistance of Extruded Al-Zn-Mg-Cu-La System alloys, Journal of the Society of Material Science Japan, Vol. 43, No. 485, pp. 1111 (1993).Google Scholar
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