Conclusions
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1.
In contrast to the samples produced by the traditional metallurgical technique, two types of boundaries are observed in powder-metallurgical materials (inter- and intraparticle), which sharply differ from each other in terms of purity. The change in of the fracture mechanism from interparticle to the intraparticle type controls, to a significant extent, the onset temperature of dissolution of the impurities, at which impact strength reaches maximum values.
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2.
The onset temperature of dissolution of impurities depends on the fractional composition of the powder It increases with increasing size of the powder particles.
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Literature Cited
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Additional information
I. P. Bardin All-Union Scientific Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 24–28, November, 1992.
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Volynova, T.F., Sidorova, I.B. & Emel'yanova, I.Z. State of the boundaries and features of the fracture of powder-metallurgical iron-manganese alloys. Met Sci Heat Treat 34, 693–699 (1992). https://doi.org/10.1007/BF00712427
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DOI: https://doi.org/10.1007/BF00712427