INTERNATIONAL STANDARD
Frictionstirwelding-Aluminium-
Part 4: Specification andqualificationof weldingprocedures
Soudage par friction-malaxage-AluminiumPartie 4: Descriptif et qualification des modes operatoires de soudage
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Contents
Page
5 Qualification based on a welding procedure test. 4
5.1 5.2 Test pieces. General.5.2.1 5.2.2 Shape and dimensions of test pieces. Welding of test pieces. 65.3 Examination and testing of test pieces. Extent of testing. 65.3.2 5.3.1 Visual testing and acceptance levels. 7 65.3.4 Destructive tests. Re-testing 12 75.4 Range of qualification. 125.4.1 5.4.2 Related to the fabricator. General. 12 125.5 Welding procedure qualification record 5.4.3 Other variables. 12 12
Qualification based on pre-production welding test. 13
6.1 6.2 Test pieces. General. 13 139 Examination and testing of test pieces. 136.4 6.5 Welding procedure qualification record. Range of qualification. 13 13
Foreword
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Welding Solid State Welding and Allied Joining Process in collaboration with the European Committee forStandardization (CEN) Technical Committee CEN/TC 121 Welding and allied processes in accordance
This second edition cancels and replaces the first edition (ISO 25239-4:2011) which has beentechnically revised.
The main changes pared to the previous edition are as follows:
- alternative process control methods (e.g. temperature control) have been included;- the wording of the paragraph on thermal management and heat treatments has been improved;-the definition for the extraction of test specimens has been modified for all test pieces and thefigures have been revised accordingly;-- the requirement for testing transverse test specimens with as welded surfaces has been deleted;- in Table 3 a new requirement on the minimum joint efficiency has been added for heat treatable alloys below 5 mm; - the pWPS is now to be qualified in accordance with the defined acceptance levels included inISO 25239-5; acceptance levels have been included in the WPQR form in Annex D.
A list of all parts in the ISO 25239 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user's national standards body. Aplete listing of these bodies can be found at
Introduction
Welding processes are widely used in the fabrication of engineered structures. During the second halfof the twentieth century fusion welding processes wherein fusion is obtained by the melting of parentat TWlinvented friction stir welding (FSW) which is carried out entirely in the solid phase (no melting). material and usually a filler metal dominated the welding of large structures. In 1991 Wayne Thomas
a ansa o apo u s r aau a pa su no asn s acarried out in the most effective way and that appropriate control is exercised over all aspects of the operation. This document focuses on the FSW of aluminium because at the time of publication themajority of mercial applications for FsW involved aluminium. Examples include railway carriages consumer products food processing equipment aerospace structures and marine vessels.
