Accession Number:

ADA021116

Title:

Notched Bend Behavior of Beryllium over a Wide Range of Strain Rates

Descriptive Note:

Interim technical rept. Sep 1973-Mar 1975

Corporate Author:

AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s):

• Nicholas, T.

Report Date:

1975-12-01

Pagination or Media Count:

46.0

Abstract:

Three point bend tests on U-notched Charpy specimens were conducted for six grades of beryllium over a range in loading rates from 0.000 001 to 10 msec. Load-deflection curves were obtained from tests performed on a servo- controlled hydraulic testing machine at low and intermediate loading rates and with a Hopkinson pressure bar apparatus at high rates. Curves of absorbed energy, maximum load, and maximum deflection against loading velocity indicate a transition velocity for several grades of beryllium at which the ductility of the material decreases sharply.

Descriptors:

• *BERYLLIUM
• *DUCTILITY
• *NOTCH SENSITIVITY
• BENDING STRESS
• CHARPY IMPACT TESTS
• LOADS(FORCES)
• PERFORMANCE TESTS
• STRAIN RATE

Subject Categories:

• Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE