S9074-AQ-GIB-010/248 Rev 1
APPENDIX A PROCEDURE AND PERFORMANCE QUALIFICATIONS FOR FRICTION STIR WELDS, FRICTION STIR PROCESSING, AND REPAIR OF FRICTION STIR WELDS FOR ALUMINUM ALLOYS A-1 SCOPE. The following subsections contain the specific requirements for qualification of friction stir and are in addition to the applicable requirements of this document. The term friction stir (FS) is used to describe all friction stir variants, such as friction stir welding (FSW) and friction stir processing (FSP). If a requirement applies to a specific FS variant, the name of the FS variant will be used. The qualification tests required by this appendix are devised to demonstrate the adequacy of the FS procedures and the procedures for repair of friction stirred material, and the ability of FS operators to produce sound FS welds and FS processed material. A-1.1 REFERENCED DOCUMENTS. A-1.1.1 Non-Government Publications. The following document forms a part of this appendix to the extent specified herein.
AMERICAN WELDING SOCIETY (AWS)
AWS D17.3/D17.3M – Specification for Friction Stir Welding of Aluminum Alloys for Aerospace Applications
(Copies of this document are available online at www.aws.org.) A-1.2 ORDER OF PRECEDENCE. In the event of a conflict between the text of this appendix and the references cited herein, the text of this appendix shall take precedence. A-2 DEFINITIONS. Additional terms for FS shall be as follows: A-2.1 GENERAL. Except as noted herein, FSW nomenclature and definitions shall conform to AWS D17.3. Additional terms related to FS are listed herein. A-2.1.1 Dissimilar Metal Welding. The welding of two materials having different S-group numbers. A-2.1.2 Double-Spindle. FS system equipped with two spindles to simultaneously weld or process material. A-2.1.3 Effective Processing Size. For FS processed regions, the ratio of the plunge depth to the thickness of the material being processed (see figure A-1). A-2.1.4 Force Control. A control method used to maintain the required force on the FS tool geometry during friction stir. A-2.1.5 Friction Stir Processing (FSP). A removable, non-consumable component used to FS weld or FS process materials. The FS tool consists of a shoulder that may or may not have a protruding probe. A-2.1.6 Friction Stir (FS) Tool. A removable, non-consumable component used to FS weld or FS process materials. The FS tool consists of a shoulder that may or may not have a protruding probe. A-2.1.7 Friction Stir Tool (FS Tool) Class. A family of FS tools that share a common mechanical or geometrical feature, or that require unique control methodologies. For example, self-reacting, adjustable probe, fixed probe, or stationary shoulder. A-2.1.8 Friction Stir (FS) Tool Design. Geometry of FS tool features that include, but are not limited to, shoulder diameter, shoulder shape, shoulder features, probe diameter, probe tip shape, probe length, probe shape (conical, cylindrical, etc.), threads, thread pitch, thread direction, number of threads, number of flats, and any other descriptive features of the shoulder, probe, or shank assembly.
A-1
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