Conclusions
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1.
The pores formed during heating to quenching temperature in a humid atmosphere and in vacuum have different origins-interaction of the metal with water vapor and evaporation of zinc, respectively. The formation of pores sharply increases the susceptibility of the alloy to delayed fracture.
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2.
It was established that pores form in the surface layer of the samples. Thus, the susceptibility to dolayed fracture can be reduced by removing the surface layer.
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Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 72–74, July, 1968.
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Zenkova, É.K., Podgorskii, B.N. Effect of furnace atmosphere on susceptibility to delayed fracture of alloy ATsM. Met Sci Heat Treat 10, 567–569 (1968). https://doi.org/10.1007/BF00654373
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DOI: https://doi.org/10.1007/BF00654373