Conclusions
Structurai evolution in powder material is subject to the laws of deformation for cast bcc metals.
The fracture energy and cold-brittleness temperature are sensitive to the structural state of the material: change in this predetermines the changes in the fracture energy and cold-brittleness temperature.
The nature of the change in fracture energy with degree of deformation is independent of the method of production of the material (cast or powder) and the rolling temperature (below the recrystallization temperature): at low deformations the fracture energy decreases (ε=0–15%); following this it increases upon formation of a cell structure (ε=15–30%). With further increase in the degree of deformation (ε=30–40%) the fracture energy decreases, upon transition to a misoriented cell structure the fracture energy in the rolling plane decreases, but in the transverse plane increases.
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Translated from Poroshkovaya Metallurgiya, No. 9(345), pp. 74–79, September, 1991.
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Danilenko, H.I., Demidik, A.N., Podrezov, Y.N. et al. Effect of plastic deformation on the fracture energy of powder and cast iron. Powder Metall Met Ceram 30, 780–784 (1991). https://doi.org/10.1007/BF00794221
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DOI: https://doi.org/10.1007/BF00794221