Microstructure and mechanical properties of probeless friction stir extrusion joined joints of 6061-T6 aluminum alloy to Q235 steel

Zhang, Peng; Zhao, Shengdun; Zhang, Chuanwei; Chen, Zheng; Zhang, Jiaying; Fei, Liangyu; Dong, Peng

doi:10.1007/s00170-021-08363-x

Cited by 4 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the past few decades, FSW has become a common method to join steel and other light dissimilar metals such as aluminum [19,20]. Many studies have shown [21][22][23][24][25] that adjusting and optimizing the FSW parameters for aluminum/steel joints can dramatically reduce the formation of brittle Fe x Al y intermetallic compounds in the joint structure, which significantly enhances the joint's tensile strength [26]. Meanwhile, there are great differences in the physical and chemical properties of aluminum/steel materials, so their corrosion behaviors have also been investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of the microstructure on the corrosion behavior of dissimilar friction stir-welded 304 austenitic stainless steel and Q235 low-carbon steel joints

Wang

Zhang

et al. 2022

Mater. Res. Express

View full text Add to dashboard Cite

In this study, friction stir welding (FSW) was adopted to prepare dissimilar welded joints composed of 304 stainless steel (SS304) and Q235 low-carbon steel. The corrosion behavior in different zones of the joint was studied. The results indicated that the corrosion in SS304 side mainly included pitting corrosion. The higher the proportion of low-angle grain boundaries (LAGBs) and the lower the proportion of twin boundaries (TBs), the worse the corrosion resistance. The corrosion in the stir zone (SZ) was mainly galvanic corrosion between mixed structures. Corrosion of the austenitic structure was not observed, but corrosion on proeutectoid ferrite, pearlite, and bainite was serious. and indicating that the uniform distribution of mixed structures and the small area proportion of austenite (cathode) lead to good corrosion resistance. The corrosion of Q235 steel side mainly occurred via the galvanic corrosion of proeutectoid ferrite and pearlite, and ferrite dissolution. The larger the area proportion of pearlite, the worse the corrosion resistance. The corrosion products of SS304 side mainly included γ-Fe2O3, FeCrO4, and Cr2O3. While the corrosion products of Q235 steel side mainly included α-Fe2O3 and α-FeOOH.

show abstract