ASTM B645-02

Standard Practice for Plane-Strain Fracture Toughness Testing of Aluminum Alloys

SCOPE
1.1 This practice is applicable to the fracture toughness testing of all aluminum alloys, tempers, and products, especially in cases where the tests are being made to establish whether or not individual lots meet the requirements of specifications and should be released to customers.
1.2 Test Method E 399 is the basic test method to be used for plane-strain fracture toughness testing of aluminum alloys. The purpose of this practice is to provide supplementary information for plane-strain fracture toughness of aluminum alloys in three main areas:
1.2.1 Specimen sampling,
1.2.2 Specimen size selection, and
1.2.3 Interpretation of invalid test results.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.4 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.

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• ICS: 77.120.10 - Aluminium and aluminium alloys
• Technical Committee: B07 - Light Metals and Alloys
• Drafting Committee: B07.05 - Testing

Relations

• Replaces: ASTM B645-98 - Standard Practice for Plane-Strain Fracture Toughness Testing of Aluminum Alloys
• Effective Date: 10-Apr-2002
• Replaced By: ASTM B645-07 - Standard Practice for Linear-Elastic Plane-Strain Fracture Toughness Testing of Aluminum Alloys
• Effective Date: 01-Sep-2007
• Referred By: ASTM B646-19 - Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• Effective Date: 10-Apr-2002
• Referred By: ASTM E399-23 - Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness of Metallic Materials
• Effective Date: 10-Apr-2002
• Referred By: ASTM F3122-14(2022) - Standard Guide for Evaluating Mechanical Properties of Metal Materials Made via Additive Manufacturing Processes
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B645–02
Standard Practice for
Plane–Strain Fracture Toughness Testing of Aluminum
1
Alloys
This standard is issued under the fixed designation B645; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
INTRODUCTION
Plane-strain fracture toughness testing of aluminum alloys is performed essentially in accordance
withTestMethodE399.However,thereisaneed,intheapplicationofTestMethodE399forquality
assurance testing, to deal with the interpretation of the results for material qualification and release in
caseswhereallrequirementsforvalidmeasurementsofplane-strainfracturetoughnesscannotbemet.
It is the purpose of this practice to provide consistent methods of dealing with those situations.
1. Scope* B646 Practice for Fracture Toughness Testing of Alumi-
2
num Alloys
1.1 This practice is applicable to the fracture toughness
E29 Practice for Using Significant Digits in Test Data to
testing of all aluminum alloys, tempers, and products, espe-
3
Determine Conformance with Specifications
cially in cases where the tests are being made to establish
E399 Test Method for Plane-Strain Fracture Toughness of
whether or not individual lots meet the requirements of
4
Metallic Materials
specifications and should be released to customers.
E1823 Terminology Relating to Fatigue and Fracture Test-
1.2 Test Method E399 is the basic test method to be used
4
ing
for plane-strain fracture toughness testing of aluminum alloys.
The purpose of this practice is to provide supplementary
3. Terminology
information for plane-strain fracture toughness of aluminum
3.1 General—Terms, definitions, symbols, and orientation
alloys in three main areas:
designations in Test Method E399 and Terminology E1823
1.2.1 Specimen sampling,
are applicable herein.
1.2.2 Specimen size selection, and
3.2 The following additional definitions are applicable:
1.2.3 Interpretation of invalid test results.
3.2.1 invalid plane-strain fracture toughness—test result,
1.3 Thevaluesstatedininch-poundunitsaretoberegarded
K ,thatdoesnotmeetoneormoreofthevalidityrequirements
Q
as the standard. The values given in parentheses are provided
in Test Method E399 and, where so characterized, is of no
for information only.
value in judging the true plain-strain fracture toughness of a
1.4 This standard does not purport to address all of the
material but may, under certain conditions, adequately guaran-
safety concerns, if any, associated with its use. It is the
tee the material’s fracture toughness for lot release purposes.
responsibility of the user of this standard to establish appro-
3.2.2 meaningful plane-strain fracture toughness—test re-
priate safety and health practices and determine the applica-
sult, designated K , that does not meet one or more of the
Q
bility of regulatory limitations prior to use.
validity requirements in Test Method E399, but for which
2. Referenced Documents there is experimental or analytical evidence that the departure
from validity is small enough that the value of K is expected
Q
2.1 ASTM Standards:
tobewithin5or10%ofthevalueof K thatwouldhavebeen
Ic
obtained had all the validity criteria been met.
1
This practice is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.05 on
2
Testing. Annual Book of ASTM Standards, Vol 02.02.
3
Current edition approved Apr. 10, 2002. Published June 2002. Originally Annual Book of ASTM Standards, Vol 14.02.
4
published as B645–78. Last previous edition B645–98. Annual Book of ASTM Standards, Vol 03.01.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B645–02
3.2.3 valid plane-strain, fracture toughness—test result 8. Test Specimen Configuration and Dimensions
meeting all the validity requirements in Test Method E399,
8.1 The specimen types, general configuration and size
that is, a value of K .
Ic requirements in Test Method E399 are applicable herein with
the following supplemental recommendations and require-
4. Summary of Practice
ments:
4.1 This practice supplementsTest Method E399 and Prac-
8.1.1 For aluminum products, it is recommended that the
2
tice B646 in three main areas:
thickness, B, and crack length, a, equal or exceed 5 (K /s )
Q YS
2
4.1.1 Specimen sampling,
rather than the required minimum of 2.5 (K /s ) in Test
Q YS
4.1.2 Specimen size selection, an
...