AS 2205.7.3—2003

Australian Standard
AS 2205.7.3
This is a free 1 page sample. Access the full version at http://infostore.saiglobal.com.


Methods for destructive testing of welds in metal Method 7.3: Fracture mechanics toughness tests (KIc , critical CTOD and critical J values)
This Standard was prepared by the Standards Australia Committee WD-006, Testing of Welds, to supersede AS 2205.7.3—1997. The objective of this edition is to update the Standard and include editorial changes in accordance with current Standards Australia editorial policy.

Fracture toughness tests have been developed as a method of characterizing the toughness of ductile materials. The results of the tests may be used in conjunction with other information, such as stress and defect size, to provide quantitative predictions of fracture susceptibility. Although there still remain many areas of debate about test methods, interpretation of results and application to service situations, the test methods have been sufficiently well established and many practical examples exist where defect assessments based on fracture toughness data have been applied successfully to working structures. In view of the above situation and the particular importance of defects and their influence on welded structures, it is appropriate that guidance be provided on the crack tip opening displacement (CTOD) testing of weld zones. This Standard has, therefore, been prepared to enable the use of the test with welds, while at the same time restricting the range of tests compared with that permitted by BS 7448.1, Fracture mechanics toughness tests, Part 1: Method for determination of K Ic critical CTOD and critical J values of metallic materials. The less constrained subsidiary test specimens permitted by BS 7448.1 (with the agreement of the relevant parties) are not permitted when testing weld metal to this Standard. For the testing of a heat-affected zone (HAZ), the use of a standard test specimen necessitates the preparation of a double-bevel butt weld test plate. Although this is the recommended method, the subsidiary test is a permitted option, as it may not always be practicable to use the specific weld preparation. The philosophy behind this rather restricted approach is the desire for a minimum of ambiguity in the interpretation of results. If it is considered necessary to go beyond the scope of this Standard to cover special circumstances, then this should only be done when the parties concerned are sufficiently well-informed on the subject to define the test conditions to suit the purpose. It is felt that it is in the best interests of standardization, particularly in view of the generally limited appreciation of the detailed theories behind the test, that excessive flexibility in the selection of the test method should not be incorporated or encouraged in the Standard.

This is a free preview. Purchase the entire publication at the link below:

This is a free 1 page sample. Access the full version at http://infostore.saiglobal.com.

AS 2205.7.3-2003, Methods for destructive testing of welds in metal - Fracture mechanics toughness tests (K(sub)lc(/sub), critical CTOD and critical J values)

Looking for additional Standards? Visit SAI Global Infostore Subscribe to our Free Newsletters about Australian Standards® in Legislation; ISO, IEC, BSI and more Do you need to Manage Standards Collections Online? Learn about LexConnect, All Jurisdictions, Standards referenced in Australian legislation Do you want to know when a Standard has changed? Want to become an SAI Global Standards Sales Affiliate? Learn about other SAI Global Services: LOGICOM Military Parts and Supplier Database Metals Infobase Database of Metal Grades, Standards and Manufacturers Materials Infobase Database of Materials, Standards and Suppliers Database of European Law, CELEX and Court Decisions

Need to speak with a Customer Service Representative - Contact Us

Sign up to vote on this title
UsefulNot useful