The dislocation width and lattice resistance (Peierls stress) of a γ-TiAl alloy are calculated by the density ratio method. The lattice resistance is shown to decrease with the dislocation width. The relationship between the Peierls stress and dislocation width variation is defined by theoretical derivation. The yield stress is negatively correlated with the shear stress of the material. It can become a useful tool for choosing an appropriate shear stress under deformation.
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Acknowledgments
This work was supported by a grant from the National Science Foundation of China (No. 51665030) and the Program for ChangJiang Scholars and Innovative Research Team in University of Ministry of Education of China (No. IRT_15R30) and Doctoral research Foundation of Lanzhou University of Technology. The authors wish to thank Engineering Research center of Nonferrous Metallurgy’s New Equipment, Ministry of Education, Lanzhou University of technology for providing help.
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Translated from Problemy Prochnosti, No. 1, pp. 65 – 71, January – February, 2019.
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Feng, R.C., Li, L.L., Li, H.Y. et al. Calculation of the γ-TiAl Lattice Resistance. Strength Mater 51, 56–61 (2019). https://doi.org/10.1007/s11223-019-00049-w
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DOI: https://doi.org/10.1007/s11223-019-00049-w