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ASTM E 399 : 2012

NA
NA

Status of Standard is Unknown

Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness K Ic of Metallic Materials
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-11-2012

1.1This test method covers the determination of fracture toughness (KIc) 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 greater2 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).3 There is no standard test method for such thin materials.

1.2This 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.

1.3General information and requirements common to all specimen configurations:

Section

Referenced Documents

2

Terminology

3

 Stress-Intensity Factor

3.1.1

 Plane-Strain Fracture Toughness

3.1.2

 Crack Plane Orientation

3.1.3

Summary of Test Method

4

Significance and Use

5

 Significance

5.1

 Precautions

5.1.1-5.1.5

 Practical Applications

5.2

Apparatus (see also 1.4)

6

 Tension Machine

6.1

 Fatigue Machine

6.2

 Loading Fixtures

6.3

 Displacement Gage, Measurement

6.4

Specimen Size, Configurations, and Preparation (see also 1.5)

7

 Specimen Size Estimates

7.1

 Standard and Alternative Specimen Configurations

7.2

 Fatigue Crack Starter Notches

7.3.1

 Fatigue Precracking (see also 1.6)

7.3.2

 Crack Extension Beyond Starter Notch

7.3.2.2

General Procedure

8

 Specimen Measurements

  Thickness

8.2.1

  Width

8.2.2

  Crack Size

8.2.3

  Crack Plane Angle

8.2.4

 Specimen Testing

  Loading Rate

8.3

  Test Record

8.4

Calculation and Interpretation of Results

9

 Test Record Analysis

9.1

Pm ax/PQ Validity Requirement

9.1.3

 Specimen Size Validity Requirements

9.1.4

Reporting

10

Precision and Bias

11


1.4Specific requirements related to test apparatus:

Double-Cantilever Displacement Gage

Annex A1

Testing Fixtures

Annex A2

Bend Specimen Loading Fixture

Annex A2.1

Compact Specimen Loading Clevis

Annex A2.2


1.5Specific requirements related to individual specimen configurations:

Bend Specimen SE(B)

Annex A3

Compact Specimen C(T)

Annex A4

Disk-Shaped Compact Specimen DC(T)

Annex A5

Arc-Shaped Tension Specimen A(T)

Annex A6

Arc-Shaped Bend Specimen A(B)

Annex A7


1.6Specific requirements related to special test procedures:

Fatigue Precracking KIc Specimens

Annex A8

Hot-Pressed Beryllium Testing

Annex A9

Rapid-Force Testing

Annex A10


1.7The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.8This 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
DocumentType
Test Method
Pages
33
PublisherName
American Society for Testing and Materials
Status
NA
SupersededBy
Supersedes

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£90.16
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