ISSN:
1573-9066
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. For as-cast specimens from the 50 at. % C section of the quaternary system Mo-Zr-Cr-C, the existence has been established of a wide fee-phase field exhibiting marked dendritic segregation. The field is bounded by the 0 and ∼25 at. % Cr tie lines. A chromium addition substantially intensifies the segregation, resulting in division of diffraction lines, and appreciably increases the microhardness of the dendrite axes. The resultant microhardness attains a value of almost 5000 kg/mm2. 2. Annealing for 100 h at 1350°C is still insufficient to achieve a state of phase equilibrium. The segregation persists. Polymorphic-peritectic decomposition takes place in the interaxial zones of the segregated fcc phase. 3. During melting, specimens were found to exhibit a steady loss of chromium (5–10 at. %), but the proportions of the remaining components were substantially unchanged. Annealing for 100 h at 1350°C also has virtually no effect on the chemical composition of these alloys.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00794180
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