THE EFFECT OF THERMAL TREATMENT ON THE METALLOGRAPHIC STRUCTURE OF BERYLLIUM AND DILUTE BERYLLIUM ALLOYS

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · Journal of Nuclear Materials (Netherlands)

DOI:https://doi.org/10.1016/0022-3115(63)90076-X· OSTI ID:4149752

Ranzetta, G V.T.; Scott, V D

Electron microscopy and electron-probe microanalysis techniques were used to study the microstructure of beryllium and some dilute beryllium alloys. The effect of tuermal treatment on the dissemination of impurities and alloying elements was investigated with particular reference to the mechanical properties of the metal at 600 deg C. In beryllium-iron alloys annealed to improve high- temperature ductility the structure was typified by the presence of large iron- containing grain-boundary precipitates, together with a more general segregation of iron to grain boundaries and other favorable sites. Some indication of solid- solution hardening in the system was apparent but no evidence of a precipitation- aging process was found. It is therefore suggested that the microstructure in the grain-boundary regions of the metal may be important in affecting the ductility and coherency of metal grains at high temperatures. Annealed beryllium --chromium alloys had good hightemperature ductility, which in this case may be associated also with the observed purification of the matrix. (auth)

• Research Organization: Atomic Weapons Research Establishment, Aldermaston, Berks, Eng.
• NSA Number: NSA-18-002249
• OSTI ID: 4149752
• Journal Information: Journal of Nuclear Materials (Netherlands), Journal Name: Journal of Nuclear Materials (Netherlands) Vol. Vol: 10; ISSN JNUMA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANNEALING
BERYLLIUM
BERYLLIUM ALLOYS
BORON
BORON CHLORIDES
BORON COMPOUNDS
BORON FLUORIDES
CHROMIUM ALLOYS
DISTRIBUTION
DUCTILITY
ELECTRON MICROSCOPY
ENERGY
ENTROPY
GRAIN BOUNDARIES
HALIDES
HEAT TREATMENTS
HIGH TEMPERATURE
IMPURITIES
IRON ALLOYS
MECHANICAL PROPERTIES
METALLOGRAPHY
METALS
METALS, CERAMICS, AND OTHER MATERIALS
NUMERICALS
PRECIPITATION
PRODUCTION
REACTION KINETICS
REDUCTION
REFINING
SEGREGATION
SOLID SOLUTIONS
SPECIFIC HEAT
TABLES
TEMPERATURE
TEMPERING
THERMODYNAMICS