BERYLLIUM CASTING. Interim Technical Report No. 8, Phase II for June 18, 1960 to September 17, 1960

Technical Report · Tue Oct 31 04:00:00 EST 1961

OSTI ID:4084470

Taber, K C; Harris, R C

An evaluation of alloy additions of lanthanum and zinconium is described. Increasing columnar grain refinement results with increasing alloy additions of lanthanum. Zirconium as an alloying grain refiner has an optimum concentration of 0.40 to 0.60 wt.% for maximum columnar grain refinement. The step castings show the reduction of coluumar grain size by increasing the cooling rate. Heat treating with prior cold reduction to promote recrystallization of the cast structure has yielded tentative relation for recrystallization time and temperature for 10% cold bare rolled cast beryllium. A trend has been observed with an optimum per cent cold reduction for a given heat treatment for maximum grain refinement. These tentative results require more work to definitely establish certain points. (auth)

• Research Organization: Beryllium Corp., Reading, Penna.
• NSA Number: NSA-15-005342
• OSTI ID: 4084470
• Report Number(s): NP-9477
• Country of Publication: United States
• Language: English

Related Subjects

BERYLLIUM
CASTING
COLD WORKING
COOLING
GRAIN SIZE
HEAT TREATMENTS
LANTHANUM ALLOYS
METALS, CERAMICS, AND OTHER MATERIALS
MIXING
RECRYSTALLIZATION
REFINING
ROLLING
TEMPERATURE
VELOCITY
ZIRCONIUM ALLOYS