Conclusions
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1.
The elongation vs temperature curves for the ÉI 929 alloy at strain rates of 3.6–3.7×106 %/h show a sharp reduction of deformation capacity due to damage in the grain boundaries.
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2.
At the low point on the elongation vs temperature curves the grain size has no noticeable effect on intergranular damage or plasticity.
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3.
In the temperature-time region 50–100°C above the low point on the elongation vs temperature curves the number of grain boundaries with cracks increases and the plasticity decreases with increasing grain size.
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Literature cited
F. F. Khimushin, Heat-Resisting Steels and Alloys [in Russian], Metallurgiya, Moscow (1964).
E. E. Levin and E. M. Pivnik, Modern Methods of Heat Treating Highly Alloyed Heat-Resisting Alloys [in Russian], LDNTP (1963).
A. V. Stanyukovich and V. K. Adamovich, Teploénergetika, No. 7 (1968).
A. V. Stanyukovich and N. D. Zaitsev, Zavod. Lab., No. 9 (1959).
D. McLean, Grain Boundaries in Metals, Oxford University Press, London (1957).
H. Conrad, Coll: Mechanical Properties of Materials at Elevated Temperatures [Russian translation], Metallurgiya, Moscow (1965).
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp, 31–33, March, 1969.
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Adamovich, V.K. The plasticity of alloy ÉI 929. Met Sci Heat Treat 11, 196–198 (1969). https://doi.org/10.1007/BF00658730
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DOI: https://doi.org/10.1007/BF00658730