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2. R.F. Decker, J.P. Rowe, J.W. Freeman, NACA Technical Note 4049, NACA, Washington, DC, June 1957.
3. E.W. Erickson, Metal Handbook, 10th ed., vol. 10, ASM, Materials Park, OH, 1990, pp. 981–994.
4. Retardation of σ-phase transformation in modified superalloy RR2072