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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 2    April 2001

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X-ray elastic constant determination and residual stress of
 two phase TiAl-based intermetallic alloy
GUO Fu-an(郭富安)1,2, ZHENG R. T.2, V. Ji1
ZHANG Yong-gong(张永刚)2, CHEN Chang-qi(陈昌麒)2

1. LM3 ESA CNRS 8006, ENSAM, 151 Bd. del'H[AKo^D〗pital Paris 75013, France;
2. Department of Materials Science and Engineering,
Beijing University of Aeronautics and Astronautics, Beijing 100083, P.R.China

Abstract:To evaluate the residual stress in TiAlbased alloys by X-ray diffraction, X-ray elastic constants (REC) of a γ-TiAl alloy were determined. From these results, the stress state of a given phase in a duplex TiAl-based alloy under a uniaxial tensile loading has been characterized by X-ray diffraction. The results show that the X-ray elastic constants and the microscopic stresses of the given phase are different from the apparent elastic constants and the macroscopic stresses of the alloy. The reason of the different distribution of the alloy was also discussed.

 

Key words: TiAl-based alloy; X-ray diffraction technique; X-ray elastic constant; duplex structure residual stress

ISSN 1672-7029
CN 43-1423/U

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