ASTM B645-10
(Practice)Standard Practice for Linear-Elastic Plane-Strain Fracture Toughness Testing of Aluminum Alloys
Standard Practice for Linear-Elastic Plane-Strain Fracture Toughness Testing of Aluminum Alloys
SIGNIFICANCE AND USE
This practice for plane-strain fracture toughness testing of aluminum alloys may be used as a supplement to Test Method E399. The application of this practice is primarily intended for quality assurance and material release in cases where valid plane-strain fracture toughness data cannot be obtained per Test Method E399.
It must be understood that the interpretations and guidelines in this practice do not alter the validity requirements of Test Method E399 or promote the designation of data that are invalid according to Test Method E399 to a “valid” condition. This practice is primarily concerned with cases where it is not possible or practical to obtain valid data, but where material release judgments must be made against specified fracture toughness values. Where it is possible to obtain a valid plane-strain fracture toughness value by replacement testing according to Test Method E399, that is the preferred approach.
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 E399 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 SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—Certain inch-pound values given in parentheses are provided for information only.
1.4 This standard is currently written to accommodate only C(T) specimens.
1.5 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.
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Designation: B645 − 10
StandardPractice for
Linear-Elastic Plane–Strain Fracture Toughness Testing of
1
Aluminum 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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
INTRODUCTION
Linear-elastic plane-strain fracture toughness testing of aluminum alloys is performed essentially in
accordance with Test Method E399. However, there is a need, in the application of Test Method E399
for quality assurance testing, to deal with the interpretation of the results for material qualification and
release in cases where all requirements for valid measurements of plane-strain fracture toughness
cannot be met. It is the purpose of this practice to provide consistent methods of dealing with those
situations.
1. Scope* priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This practice is applicable to the fracture toughness
testing of all aluminum alloys, tempers, and products, espe-
2. Referenced Documents
cially in cases where the tests are being made to establish
2
whether or not individual lots meet the requirements of 2.1 ASTM Standards:
specifications and should be released to customers. B646 Practice for Fracture Toughness Testing of Aluminum
Alloys
1.2 TestMethodE399isthebasictestmethodtobeusedfor
E29 Practice for Using Significant Digits in Test Data to
plane-strainfracturetoughnesstestingofaluminumalloys.The
Determine Conformance with Specifications
purpose of this practice is to provide supplementary informa-
E399 Test Method for Linear-Elastic Plane-Strain Fracture
tion for plane-strain fracture toughness of aluminum alloys in
Toughness K of Metallic Materials
Ic
three main areas:
E561 Test Method forK-R Curve Determination
1.2.1 Specimen sampling,
E1823 TerminologyRelatingtoFatigueandFractureTesting
1.2.2 Specimen size selection, and
1.2.3 Interpretation of invalid test results.
3. Terminology
1.3 The values stated in SI units are to be regarded as
3.1 General—Terms, definitions, symbols, and orientation
standard. No other units of measurement are included in this
designations in Test Method E399 and Terminology E1823 are
standard.
applicable herein.
1.3.1 Exception—Certain inch-pound values given in paren-
theses are provided for information only. 3.2 Definitions:The following additional definitions are ap-
plicable:
1.4 This standard is currently written to accommodate only
3.2.1 invalid plane-strain fracture toughness—test result,
C(T) specimens.
K ,thatdoesnotmeetoneormoreofthevalidityrequirements
Q
1.5 This standard does not purport to address all of the
in Test Method E399 and, where so characterized, is of no
safety concerns, if any, associated with its use. It is the
value in judging the true plain-strain fracture toughness of a
responsibility of the user of this standard to establish appro-
material but may, under certain conditions, adequately guaran-
tee the material’s fracture toughness for lot release purposes.
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. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2010. Published August 2010. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1978. Last previous edition approved in 2007 as B645–07. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0645-10. the ASTM website.
*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
1
---------------------- Page: 1 ----------------------
B645 − 10
3.2.2 valid plane-strain, fracture toughness—test result 8. Test Specimen Configuration and Dimensions
meetingallthevalidityrequirementsinTestMethodE399,that
8.1 Specimen size requirements stated in the individual
is, a value of K .
Ic
material specifications shall be followed. In the absence of
specific requirements, the specimen types, general
4. Summary of Practice
configuration, and size requirements in Test Method E399 are
4.1 This practice supplements Test Method E399 and Prac-
applicable herein with the following supplemental recommen-
tice B646 in three main areas:
dations and requirements:
4.1.1 Specimen sampling,
8.1.1 For aluminum products, the recommended minimum
4.1.2 Speci
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B645–07 Designation:B645–10
Standard Practice for
Linear-Elastic Plane–Strain Fracture Toughness Testing of
1
Aluminum 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 (´) 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
Linear-elasticplane-strainfracturetoughnesstestingofaluminumalloysisperformedessentiallyin
accordancewithTestMethodE399.However,thereisaneed,intheapplicationofTestMethodE399
forqualityassurancetesting,todealwiththeinterpretationoftheresultsformaterialqualificationand
release in cases where all requirements for valid measurements of plane-strain fracture toughness
cannot be met. It is the purpose of this practice to provide consistent methods of dealing with those
situations.
1. Scope*
1.1 Thispracticeisapplicabletothefracturetoughnesstestingofallaluminumalloys,tempers,andproducts,especiallyincases
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 E399 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.
1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformation
only.
1.4
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—Certain inch-pound values given in parentheses are provided for information only.
1.4 This standard is currently written to accommodate only C(T) specimens.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B646 Practice for Fracture Toughness Testing of Aluminum Alloys
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E399 Test Method for Linear-Elastic Plane-Strain Fracture Toughness K of Metallic Materials
Ic
E561 Test Method for K-R Curve Determination
E1823 Terminology Relating to Fatigue and Fracture Testing
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 Testing.
Current edition approved Sept.May 1, 2007.2010. Published September 2007.August 2010. Originally approved in 1978. Last previous edition approved in 20022007 as
B645–02.B645–07. DOI: 10.1520/B0645-107.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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.
1
---------------------- Page: 1 ----------------------
B645–10
3. Terminology
3.1 General—Terms, definitions, symbols, and orientation designations in Test Method E399 and Terminology E1823 are
applicable herein.
3.2 The following additional definitions are applicable:
3.2.1 invalid plane-strain fracture toughness—test result, K , that does not meet one or more of the validity requirements in
Q
Test Method E399 and, where so characterized, is of no value in judging the true plain-strain fracture toughness of a material but
may, under certain conditions, adequately guarantee the material’s fracture toughness for lot release purposes.
3.2.2 valid plane-strain, fracture toughness—test result meeting all the validity requirements in Test Method E399, that is, a
value of K .
Ic
4. Summary of Practice
4.1 This practice supplements Test Method E399 and Practice B646 in three main areas:
4.1.1 Specimen sampling,
4.1.2 Specimen size selection, and
4.1.3
...
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