Journal Published Online: 01 May 1977
Volume 5, Issue 3

Estimating Plane Strain Fracture Toughness of High Strength Aluminum Alloys from Crack Arrest Toughness

CODEN: JTEVAB

Abstract

A comparison is made between fracture toughness KIc as measured by recommended ASTM procedures and crack arrest toughness KIa as measured on more than 100 bolt-loaded double-cantilever beam (DCB) specimens from 7075, 7050, and 7049 alloy plates. Close agreement was found between the two values, KIa being on the average about 0.75 ksiin. (0.82 MPa√m) lower than than KIc over the range 18 to 29 ksiin. (20 to 32 MPa√m). This indicates that a simplified test based on a bolt-loaded DCB specimen could be used for quality control, lot release, and screening purposes. Measurements of crack length and specimen deflection are all that are required; the specimens do not have to be fatigue precracked, nor is a tensile machine needed.

Author Information

Dorward, RC
Kaiser Aluminum & Chemical Corp., Center for Technology, Pleasanton, Calif.
Hasse, KR
Kaiser Aluminum & Chemical Corp., Center for Technology, Pleasanton, Calif.
Pages: 4
Price: $25.00
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Details
Stock #: JTE11634J
ISSN: 0090-3973
DOI: 10.1520/JTE11634J