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Microstructure, mechanical properties and formability of friction stir welded dissimilar materials of if-steel and 6061 Al alloy

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International Journal of Minerals,Metallurgy and Materials 2019年第6期26卷 722-731页

作者： Semih Mahmut Aktarer Dursun Murat Sekban Tevfik Kucukomeroglu Gencaga Purcek Department of Automotive Technology Recep Tayyip Erdogan UniversityRize 53020Turkey Department of Naval Architecture and Marine Engineering Karadeniz Technical UniversityTrabzon 61530Turkey Department of Mechanical Engineering Karadeniz Technical UniversityTrabzon 61080Turkey

AA 6061 alloy and interstitial-free(IF)steel plates were joined by the friction stir welding(FSW)method,and the microstructure,mechanical properties,and biaxial stretch formability of the friction stir welded(FSWed)parts were *** results indicate that the FSWed parts showed optimum tensile strength during FSW with the 0.4-mm offset position of the *** Fe4Al13 intermetallic compound formed in the defect-free intersection of AA 6061 and if-steel plates during *** hardness of the if-steel part of the FSWed region increased almost 90%relative to its initial hardness of HV0.2 *** tensile and yield strengths of FSWed regions were approximately 170 MPa and 145 MPa,*** to the formability tests,the Erichsen Index(EI)of the if-steel,AA 6061,and the FSWed samples were determined to be 2.9 mm,1.9 mm,and 2.1 mm,*** EI of the FSWed sample was almost the same as that of the AA 6061 ***,it decreased compared with that of the *** force at EI(FEI)was approximately 1180 N for the FSWed *** value is approximately 70%higher than that of AA 6061 alloy.

关键词： friction stir welding if-steel aluminum alloy microstructure mechanical properties formability

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