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Deformation and cracking behavior of preheated cylindrical powder blanks

  • Theory and Technology of Sintering, Thermal, and Chemicothermal Treatment Processes
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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

With increasing hf/dd the deformability of preheated powder blanks to the formation of the first cracks on their side surfaces grows and the mean density of forged blanks falls. The increase in the deformability of preheated powder blanks brought about by an increase in hf/d0 is a result of more intense transverse (tangential in the case of powder blanks of cylindrical shape) deformation of the powder particles located on their side surfaces. The tangential strain of the side surface of a powder blank eτ, which is due to the “spreading” of its central zone, is independent of the value of the hf/d0 ratio, and can be employed as a criterion for assessing the ductility of a porous powder material undergoing a forging test. A method of calculating the dimensions of starting powder blanks is proposed which makes it possible to ascertain whether a given part can be produced with the required transverse strain.

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Literature cited

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Authors and Affiliations

  1. Novocherkassk Polytechnic Institute, USSR

    Yu. G. Dorofeev & V. V. Sinel'shchikov

Authors
  1. Yu. G. Dorofeev
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  2. V. V. Sinel'shchikov
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Translated from Poroshkovaya Metallurgiya, No. 1(205), pp. 25–30, January, 1980.

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Dorofeev, Y.G., Sinel'shchikov, V.V. Deformation and cracking behavior of preheated cylindrical powder blanks. Powder Metall Met Ceram 19, 20–23 (1980). https://doi.org/10.1007/BF00798156

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  • DOI: https://doi.org/10.1007/BF00798156

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