Volume 14, Issue 14 (Second Special Issue 2015)                   Modares Mechanical Engineering 2015, 14(14): 97-107 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Elyasi M, Aghajani H, Hossinzadeh M. Study on joint zone Microstructure Evolution and Hardness in Friction Stir welding of AA1100 Aluminum alloy to A441 AISI steel. Modares Mechanical Engineering 2015; 14 (14) :97-107
URL: http://mme.modares.ac.ir/article-15-9650-en.html
Abstract:   (6837 Views)
Friction stir welding (FSW) has become a technology of widespread interest because of its numerous advantages, most important of which is its ability to weld otherwise unweldable alloys. In this study, friction stir welding process has been used to join A441 AISI steel and AA1100 aluminum alloy. Optical microscopy, X-ray diffraction analysis (XRD), Energy-dispersive X-ray spectroscopy (EDS) and Vickers microhardness tests were employed to study on the joint microstructure evolution and hardness. The results showed that after welding process, head affected zone (HAZ) and stir zone (SZ) were formed in steel base metal side and head affected zone (HAZ), thermo-mechanical affected zone (TMAZ) and stir zone (SZ) were formed in aluminum alloy side. Mg2Al3 spherical particles formed with the ferrite and pearlite constituents in the junction. These particles were formed between the aluminum grain boundaries and due to the difference in contraction coefficient with aluminum base metal, were causing hot cracks in stir zone during solidification. Due to the generated frictional heat, small grains of ferrite and pearlite with very fine grain size of aluminum were formed in stir zone. Base metals dynamic recrystallization and formation of intermetallic compounds led to stir zone microhardness became higher than other areas.
Full-Text [PDF 1804 kb]   (4782 Downloads)    
Article Type: Research Article | Subject: Welding
Received: 2014/06/12 | Accepted: 2014/07/31 | Published: 2014/10/11

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.