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ARP1947C - Dendrite Arm Spacing of Structural Aircraft Quality D357 Aluminum Alloy Castings, Determination and Acceptance of

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Document Number: ARP1947C
Project Initiation: 04-03-2013
Project Number:
Revision Number: C
Sponsor Name: Tim Boysen
Title
Dendrite Arm Spacing of Structural Aircraft Quality D357 Aluminum Alloy Castings, Determination and Acceptance of
Scope
This document covers the recommended practice for determining the acceptability of the dendrite arm spacing (DAS) of D357-T6 aluminum alloy castings required to have tensile strength not lower than 50,000 psi (345 MPa). To apply this method, at least two coupons used for DAS measurement and tensile testing shall be attached to the casting in locations as defined by the cognizant engineering organization. Areas of the casting which require DAS control must be accessible for surface DAS measurements.
Rationale
Five year review
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