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ASTM E 1304 : 1997

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Method for Plane-Strain (Chevron-Notch) Fracture Toughness of Metallic Materials
Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

04-10-1997

CONTAINED IN VOL. 03.01, 2015 Defines the determination of planestrain (chevron-notch) fracture toughnesses, K[Iv] or K[IvM], of metallic materials.

1.1 This test method covers the determination of plane-strain (chevron-notch) fracture toughnesses, KIv or K IvM, of metallic materials. Fracture toughness by this method is relative to a slowly advancing steady state crack initiated at a chevron-shaped notch, and propagating in a chevron-shaped ligament (Fig. 1). Some metallic materials, when tested by this method, exhibit a sporadic crack growth in which the crack front remains nearly stationary until a critical load is reached. The crack then becomes unstable and suddenly advances at high speed to the next arrest point. For these materials, this test method covers the determination of the plane-strain fracture toughness, KIvj or KIvM, relative to the crack at the points of instability.

Note 1—One difference between this test method and Test Method E 399 (which measures K Ic) is that Test Method E 399 centers attention on the start of crack extension from a fatigue precrack. This test method makes use of either a steady state slowly propagating crack, or a crack at the initiation of a crack jump. Although both methods are based on the principles of linear elastic fracture mechanics, this difference, plus other differences in test procedure, may cause the values from this test method to be larger than KIc values in some materials. Therefore, toughness values determined by this test method cannot be used interchangeably with KIc.

1.2 This test method uses either chevron-notched rod specimens of circular cross section, or chevron-notched bar specimens of square or rectangular cross section (Figs. 1-10). The terms "short rod" and "short bar" are used commonly for these types of chevron-notched specimens.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Committee
E 08
DevelopmentNote
Supersedes SAE ARP 1704 (07/99)
DocumentType
Test Method
Pages
11
ProductNote
Reconfirmed 1997
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy

ASTM B 646 : 2017 Standard Practice for Fracture Toughness Testing of Aluminum Alloys
ASTM E 1823 : 2013 Standard Terminology Relating to Fatigue and Fracture Testing
ASTM F 3122 : 2014 Standard Guide for Evaluating Mechanical Properties of Metal Materials Made via Additive Manufacturing Processes
ASTM E 1221 : 2012 : REV A : R2018 Standard Test Method for Determining Plane-Strain Crack-Arrest Fracture Toughness, <emph type="bdit">K<inf>Ia</inf></emph>, of Ferritic Steels

ASTM E 8/E8M : 2016-09 TEST METHODS FOR TENSION TESTING OF METALLIC MATERIALS

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