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X-ray Fractographic Study on TiAl Alloys with Various Types of Microstructures

Published online by Cambridge University Press:  06 March 2019

Hiroyuki Tabata ,
Zenjiro Yajima  and
Yukio Hirose
Hiroyuki Tabata
Affiliation:
Industrial Research Institute of Islrikawa Ro-1 Tomizii, Kanazawa 920-02, Japan
Zenjiro Yajima
Affiliation:
Department of Engineering Science Kanazawa institute of Technology 7-1 Oogigaoka, Nonoichi, Kanazawa 921, Japan
Yukio Hirose
Affiliation:
Department of Materials Science and Engineering Kanazawa University Kakuma, Kanazawa 920-11, Japan
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Abstract

The fracture toughness test was conducted on γ + α2 two-phase TiAl alloys with lamellar, duplex and near-y structures. The x-ray fractographic technique was applied to the fracture, surfaces. The plastic zone size my was determined on the basis of the distributions of the residual stress and the half-value breadth beneath the fracture surfaces. Although the fracture mode shows microstructure dependence, ωγ is related to the fracture toughness value KIC and the yield stress σY as:

ωy=α(KIC/σY)

where α is 0.13.

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. 427 - 434
Copyright
Copyright © International Centre for Diffraction Data 1994

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References

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