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ASTM-E399 1997

ASTM-E399 1997

$58.50

E399-90(1997) Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials

Published By Publication Date Number of Pages
ASTM 1997 34
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1.1 This test method covers the determination of the plane-strain fracture toughness (KIc) of metallic materials by tests using a variety of fatigue-cracked specimens having a thickness of 0.063 in. (1.6 mm) or greater. The details of the various specimen and test configurations are shown in Annexes A1 through A7 and A9.

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

1.2 This test method also covers the determination of the specimen strength ratio Rsx where x refers to the specific specimen configuration being tested. This strength ratio is a function of the maximum load the specimen can sustain, its initial dimensions and the yield strength of the material.

1.3 Measured values of plane-strain fracture toughness stated in inch-pound units are to be regarded as standard.

1.4 This test method is divided into two main parts. The first part gives general information concerning the recommendations and requirements for Ic testing. The second part is composed of annexes that give the displacement gage design, fatigue cracking procedures, and special requirements for the various specimen configurations covered by this method. In addition, an annex is provided for the specific procedures to be followed in rapid-load plane-strain fracture toughness tests. General information and requirements common to all specimen types are listed as follows:

Sections Referenced Documents 2 Terminology 3 Stress-Intensity Factor 3.1.1 Plane-Strain Fracture Toughness 3.1.2 Summary of Test Method 4 Significance and Use 5 Precautions 5.1.1 to 5.1.3 Practical Applications 5.2 Apparatus 6 Loading Fixtures 6.2 Displacement Gage Design Annex A1 Displacement Measurements 6.3 Sections Specimens Size, Configurations, and Preparation 7 Specimen Size Estimates 7.1 Standard and Alternative Specimen Configurations 7.2 Forms of Fatigue Crack Starter Notch 7.3.1 Fatigue Cracking Annex A2 Crack Extension Beyond Starter 7.3.2.2 Measurements before Testing Thickness 8.2.1 Width 8.2.3 Starter Notch Root Radius 7.3.1 Specimen Testing Loading Rate 8.3 Test Record 8.4 Measurements after Testing Crack Length 8.2.2 Crack Plane Angle 8.2.4 Calculation and Interpretation of Results 9 Analysis of Test Record 9.1 Validity Requirements on P max /P Q 9.1.2 Validity Requirements on Specimen Size 9.1.3 Crack Plane Orientation Designations 9.2 Fracture Appearance Descriptions 9.3 Reporting 10 Precision and Bias 11 Special Requirements for Rapid Load K 1c (t) Tests Annex A7 Bend Specimen SE(B) Annex A3 Compact Specimen C(T) Annex A4 Arc-Shaped Tension Specimen A(T) Annex A5 Disk-Shaped Compact Specimen DC(T) Annex A6 Arc-Shaped Bend Specimen Annex A9

1.5 Special requirements for the various specimen configurations appear in the following order:

1.6 This standard does not purport to address the safety problems 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.

PDF Catalog

PDF Pages PDF Title
1 Scope
2 Referenced Documents
Terminology
Summary of Test Method
3 Significance and Use
FIG. 1
FIG. 2
FIG. 3
4 Apparatus
Specimen Size, Configurations, and Preparation
5 FIG. 4
FIG. 5
FIG. 6
6 General Procedure
7 Calculation and Interpretation of Results
FIG. 7
8 Report
FIG. 8
FIG. 9
9 Precision and Bias
TABLE 1
10 A1. DESIGN FOR DOUBLE-CANTILEVER DISPLACEMENT GAGE
A1.1
FIG. 10
11 FIG. A1.1
12 A2. FATIGUE PRECRACKING OF KIc FRACTURE TOUGHNESS SPECIMENS
A2.1 Introduction
FIG. A1.2
13 A2.2 Equipment
A2.3 Specimen Requirements
A2.4 Precracking Procedure
14 A3. SPECIAL REQUIREMENTS FOR THE TESTING OF BEND SPECIMENS
A3.1 Specimen
A3.2 Specimen Preparation
A3.3 Apparatus
A3.4 Procedure
A3.5 Calculations
15 FIG. A3.1
16 A4. SPECIAL REQUIREMENTS FOR THE TESTING OF COMPACT SPECIMENS
A4.1 Specimen
A4.2 Specimen Preparation
A4.3 Apparatus
A4.4 Procedure
FIG. A3.2
17 A4.5 Calculations
FIG. A4.1
18 FIG. A4.2
19 A5. SPECIAL REQUIREMENTS FOR THE TESTING OF THE ARC-SHAPED TENSION SPECIMEN
A5.1 Specimen
A5.2 Specimen Preparation
A5.3 Apparatus
A5.4 Procedure
20 A5.5 Calculations
22 FIG. A5.1
23 FIG. A5.2
FIG. A5.3
24 A6. SPECIAL REQUIREMENTS FOR THE TESTING OF THE DISK-SHAPED COMPACT SPECIMEN
A6.1 Specimen
A6.2 Specimen Preparation
A6.3 Apparatus
A6.4 Procedure
FIG. A6.1
25 A6.5 Calculations
FIG. A6.2
27 A7. SPECIAL REQUIREMENTS FOR RAPID-LOAD PLANE-STRAIN FRACTURE TOUGHNESS KIc(t) TESTING
A7.1 Scope
A7.2 Summary of Requirements
A7.3 Significance and Use
A7.4 Terminology
A7.5 Apparatus
TABLE A6.1
28 A7.6 Procedure
A7.7 Calculation and Interpretation of Results
FIG. A7.1
29 A7.8 Report
A7.9 Precision and Bias
FIG. A7.2
30 A8. SPECIAL REQUIREMENTS FOR THE TESTING OF BERYLLIUM
A8.1 Scope
A8.2 Specimen Size, Configuration and Preparation
A8.3 Testing and Record Analyses
31 A9. SPECIAL REQUIREMENTS FOR TESTING ARC-SHAPED BEND SPECIMENS
A9.1 Specimen
A9.2 Specimen Preparation
A9.3 Apparatus
A9.4 Procedure
FIG. A9.1
32 A9.5 Calculations
FIG. A9.2
33 REFERENCES

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