Translated Standard: Russian
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1. Scope

1.1 This test method covers the determination of fracture toughness ( K _Ic ) of metallic materials under predominantly linear-elastic, plane-strain conditions using fatigue precracked specimens having a thickness of 1.6 mm (0.063 in.) or greater subjected to slowly, or in special (elective) cases rapidly, increasing crack-displacement force. Details of test apparatus, specimen configuration, and experimental procedure are given in the Annexes.

Note 1Plane-strain fracture toughness tests of thinner materials that are sufficiently brittle (see 7.1) can be made using other types of specimens (1) . There is no standard test method for such thin materials.

1.2 This test method is divided into two parts. The first part gives general recommendations and requirements for K _Ic testing. The second part consists of Annexes that give specific information on displacement gage and loading fixture design, special requirements for individual specimen configurations, and detailed procedures for fatigue precracking. Additional annexes are provided that give specific procedures for beryllium and rapid-force testing.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

B645 Practice for Linear-Elastic Plane-Strain Fracture Toughness Testing of Aluminum Alloys

B909 Guide for Plane Strain Fracture Toughness Testing of Non-Stress Relieved Aluminum Products

E4 Practices for Force Verification of Testing Machines

E8/E8M Test Methods for Tension Testing of Metallic Materials

E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

E337 Test Method for Measuring Humidity with a Psychrometer (the Measurement of Wet- and Dry-Bulb Temperatures)

E456 Terminology Relating to Quality and Statistics

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

E1820 Test Method for Measurement of Fracture Toughness

E1823 Terminology Relating to Fatigue and Fracture Testing

E1921 Test Method for Determination of Reference Temperature, To, for Ferritic Steels in the Transition Range

Keywords

Composition analysis--metals/alloys; Cracking--metallic materials; Defects--metals/alloys; Fabricated materials; Failure end point--metals/alloys; Fatigue; Fracture testing--metals/alloys; Loading tests--metals/alloys; Metallurgical materials/applications; Metals and metallic materials; Plane-strain testing; Quality control (QC)--metals; Strain testing--metallic materials; Stress--metallic materials; Tritensile plane strain;

ICS Code

ICS Number Code 77.040.10 (Mechanical testing of metals)

DOI: 10.1520/E0399-09E02

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