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기술보고서

기술보고서 게시판 내용
타이틀	Effects of Fusion Tack Welds on Self-Reacting Friction Stir Welds
저자	Nunes, A. C., Jr.;; Pendleton, M. L.;; Brooke, S. A.;; Russell, C. K.
Keyword	ALUMINUM ALLOYS;; FRICTION STIR WELDING;; PANELS;; SEAMS (JOINTS); TENSILE TESTS;; WELDED JOINTS
URL	http://hdl.handle.net/2060/20130000443
보고서번호	NASA/TM-2012-217474
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	In order to know whether fusion tack welds would affect the strength of self-reacting friction stir seam welds in 2195-T87 aluminum alloy, the fracture stresses of 144 tensile test coupons cut from 24 welded panels containing segments of friction stir welds were measured. Each of the panels was welded under unique processing conditions. A measure of the effect of the tack welds for each panel was devised. An analysis of the measures of the tack weld effect supported the hypothesis that fusion tack welds do not affect the strength of self-reacting friction stir welds to a 5% level of confidence.