Role of electron concentration in softening and hardening of ternary molybdenum alloys
Technical Report
·
OSTI ID:4171947
Effects of various combinations of hafnium, tantalum, rhenium, osmium, iridium, and platinum in ternary molybdenum alloys on alloy softening and hardening were determined. Hardness tests were conducted at four test temperatures over the temperature range 77 to 411$sup 0$K. Results showed that hardness data for ternary molybdenum alloys could be correlated with anticipated results from binary data based upon expressions involving the number of s and d electrons contributed by the solute elements. The correlation indicated that electron concentration plays a dominant role in controlling the hardness of ternary molybdenum alloys. (STAR)
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, Ohio (USA). Lewis Research Center
- NSA Number:
- NSA-33-001249
- OSTI ID:
- 4171947
- Report Number(s):
- N--75-14888; NASA-TN-D--7893; E--8101
- Country of Publication:
- United States
- Language:
- English
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*IRIDIUM ALLOYS-- MECHANICAL PROPERTIES
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*OSMIUM ALLOYS-- MECHANICAL PROPERTIES
*PLATINUM ALLOYS-- MECHANICAL PROPERTIES
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CHEMICAL COMPOSITION
DISTRIBUTION
ELECTRONS
HARDNESS
HIGH TEMPERATURE
LOW TEMPERATURE
MEDIUM TEMPERATURE
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
TERNARY ALLOY SYSTEMS