Effect of Tool Design and Process Parameters on Properties of Al Alloy 6016 Friction Stir Spot Welds

Abstract

Friction stir spot welding (FSSW) of Al alloy 6016-T4 sheet was evaluated using a conventional pin (CP) tool and off-center feature (OC) tool. Tool rotation speed and plunge depth were varied to determine the effect of individual process parameter on lap-shear separation load. Maximum separation load of about 3.3 kN was obtained by using a 0.2 mm shoulder penetration depth with 1500 rpm tool rotation speed for the CP tool and 2500 rpm for the OC tool. Three different weld separation modes under lap-shear loading were observed: interfacial separation, nugget fracture separation and upper sheet fracture separation. Microhardness profile for weld cross section indicated no direct relationship between microhardness distribution and separation locations.

Department(s)

Materials Science and Engineering

Sponsor(s)

National Science Foundation (U.S.)

Keywords and Phrases

Al Alloy 6016; Friction Stir Spot Welding; Process Parameter; Separation Mode; Tool Design

International Standard Serial Number (ISSN)

0924-0136

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Elsevier, All rights reserved.

Publication Date

01 Jun 2011

Link to Full Text

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