Microstructure and properties of a Cu--Ni--Cr spinodal alloy

Journal Article · Sat Jan 01 00:00:00 EST 1977 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02646565· OSTI ID:6490351

Wu, C K; Thomas, G

A commercial Cu-28%Ni-2.8%Cr alloy has been heat treated to produce spinodal structures. Conventional transmission electron microscopy (TEM) and diffraction have been used to study the spinodally decomposed product and to measure the wavelengths in the specimens. It is found that the coarsening of coherent particles obeys the relation lambda..cap alpha..t/sup /sup 1///sub 3// at 700/sup 0/C and lambda..cap alpha..t/sup /sup 1///sub 4// at 600/sup 0/C. Loss of coherency is observed only when aging at 700/sup 0/C and lambda approx. 1000A, when interfacial dislocations with b = a/2 <110> are created after which the coarsening rate is accelerated. Tensile tests were performed to measure mechanical properties of the aged samples, and the fracture surfaces were examined by scanning electron microscopy. The correlations of microstructural changes and mechanical properties are discussed.

• Research Organization: Univ. of California, Berkeley, CA (United States)
• OSTI ID: 6490351
• Journal Information: Metall. Trans., A; (United States), Vol. 8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
MICROSTRUCTURE
TENSILE PROPERTIES
COPPER BASE ALLOYS
NICKEL ALLOYS
ELECTRON MICROSCOPY
FRACTURE PROPERTIES
HEAT TREATMENTS
HIGH TEMPERATURE
PHASE DIAGRAMS
ALLOYS
COPPER ALLOYS
CRYSTAL STRUCTURE
DIAGRAMS
MECHANICAL PROPERTIES
MICROSCOPY
360103* - Metals &amp; Alloys- Mechanical Properties
360102 - Metals &amp; Alloys- Structure &amp; Phase Studies