Internal oxidation and mechanical properties of TZM-Mo alloy View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1974-12

AUTHORS

C. T. Liu, H. Inouye

ABSTRACT

The internal oxidation behavior of the bcc alloy TZM-Mo (Mo-0.5 wt pct Ti-0.08 wt pct Zr-0.02 wt pet C) was investigated in low-pressure O2, CO, and H2O environments at 1098 and 1273 K. The results indicate that a diffusion process controls the kinetics of the oxygen absorption at 1098 K, while bulk diffusion and gas-metal interaction at the specimen surface both affect the rate at 1273 K. The carbon content of TZM in these experiments increased initially and then decreased. Decarburization became significant only after extended exposure at 1273 K. The deformation and fracture behavior of both oxidized and heat-treated TZM specimens were studied at temperatures to 1589 K. TZM specimens showed an increase in strength and a linear decrease in ductility with oxygen content. Oxidized TZM lost its ductility completely at an oxygen level of 300 ppm at room temperature, 1366, and 1589 K, but 500 ppm was required at 1098 K. The ductility of embrittled TZM was increased significantly with heat treatment at high temperatures and was almost completely restored after annealing at 1973 K. The change in mechanical properties is discussed in terms of internal oxidation and precipitation of oxides. More... »

PAGES

2515-2525

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02643872

DOI

http://dx.doi.org/10.1007/bf02643872

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021983963


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