Effects of long-term aging on ductility of the columbium alloys C-103, Cb-1Zr, and Cb-752 and the molybdenum alloy Mo-TZM
A program was conducted to determine if aging embrittlement occurs in the columbium alloys C-103, Cb-1Zr, and Cb-752 or in the molybdenum alloy Mo-TZM. Results showed that aging embrittlement does not occur in C-103, Cb-1Zr, or Mo-TZM during long-term (1000 h) aging at temperatures in the range 700 to 1025 C. In contrast, aging embrittlement did occur in the Cb-752 alloy after similar aging at 900 C. A critical combination of the solute additions W and Zr in Cb-752 led to Zr segregation at grain boundaries during long-term aging. This segregation subsequently resulted in embrittlement as indicated by an increase in the ductile-brittle transition temperature from below -1960 C to about -150 C. (Author) (GRA)
- OSTI ID:
- 7345529
- Report Number(s):
- N-76-11278; NASA-TN-D-8095; E-8374
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
AGING
ALLOY-C-103
ALLOY-CB-752
ALLOY-TZM
ALLOYS
DUCTILE-BRITTLE TRANSITIONS
DUCTILITY
EMBRITTLEMENT
HAFNIUM ALLOYS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
MOLYBDENUM BASE ALLOYS
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHYSICAL PROPERTIES
TANTALUM ALLOYS
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
TRANSITION TEMPERATURE
TUNGSTEN ALLOYS
YTTRIUM ALLOYS
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS