Correlation between microstructure and mechanical properties of 6061-T6 double-side FSW joint. (February 2019)

• Record Type: Journal Article
• Authors: Du, Chengchao; Wang, Xue; Pan, Qiuhong; Xue, Kailin; Ni, Mansheng; Liu, Junjian
• Is Part Of: Journal of manufacturing processes. Volume 38(2019)
• Page Start: 122
• Page End: 134
• Publication Date: 2019-02
• Subjects: Friction stir welding -- Aluminum alloy -- Microstructure -- Texture -- Hardness -- Strength; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2019.01.010
• Languages: English
• ISSNs: 1526-6125

Abstract

Abstract: 6061-T6 (6 mm thick) double-side friction stir welding (DS-FSW) joint was fabricated using a stir tool with a pin length of 4.3 mm. The microstructure and mechanical properties of the DS-FSW joint was characterized. The results showed that the texture of shoulder affect zone (SAZ) was {111}<110>. The texture of the pin affect zone (PAZ) was {112}<110> and {111}<110> as the additional shear stress from the thread. During the welding of front-side, the dislocation density and precipitates of the remaining back-side SAZ was improved. The higher dislocation density and more precipitates contributed to a higher hardness of the remaining back-side SAZ. The strength and elongation of remaining back-side SAZ in welding direction were greatly damaged as the poor combination between the deposited metal layers under the thermal and mechanical influences from the welding of front-side. The AS side of remaining back-side SAZ was enhanced under the thermal and mechanical influences from the welding of front-side. The cracking did not occur on the AS side of back-side stir zone (SZ) anymore as the enhanced AS side of remaining back-side SAZ.