SYMPOSIA PAPER Published: 01 January 1984
STP32732S

The Use of the Chevron-Notched Short-Bar Specimen for Plane-Strain Toughness Determination in Aluminum Alloys

Source

An extensive study of the use of the chevron-notched short-bar (CNSB) specimen for measuring plane-strain fracture toughness in high-strength aluminum alloys is reported. The toughness measured in a CNSB specimen, KSB, correlates closely with plane-strain fracture toughness, KIc, for toughnesses less than 35 MPa m1/2. At higher toughnesses KSB is higher than KIc for two reasons; first, sample heterogeneity causes the different sized specimens to sample different material, and second, an effect of rising crack growth resistance in the toughness range 40 to 55 MPa m1/2; these latter test results should be considered invalid; however, within this range the KIc, KSB correlation, although largely empirical, is still useful for screening purposes.

The toughness in high-strength aluminum alloy rolled plate may vary markedly through the plate thickness. Examples of these variations are presented.

Author Information

Brown, KR
Kaiser Aluminum & Chemical Corp., Center for Technology, Pleasanton, Calif.
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Details
Developed by Committee: E08
Pages: 237–254
DOI: 10.1520/STP32732S
ISBN-EB: 978-0-8031-4917-5
ISBN-13: 978-0-8031-0401-3