SEM and EDX Analysis of the Fracture Surface of the Submerged Friction Stir Processed EN AW 7075 Aluminum Alloy

Abstract:

This paper presents an analysis of the fracture surface of the EN AW 7075 aluminum alloy, processed through submerged friction stir processing in water. Multiple passes were used during processing. Specimens prepared from the processed material were also examined with a focus on their fracture surfaces in relation to tensile failure. The investigation of these surfaces included microscopic analyses using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) techniques to examine the microstructure, fracture surfaces, and elemental composition of the analyzed area. Insights from the analysis of the fracture surface of the EN AW 7075 aluminum alloy processed by submerged friction stir processing in water provide a basis for recommendations to enhance the alloy's quality and reliability. The findings of this research advance knowledge on submerged friction stir processing in water for the EN AW 7075 aluminum alloy.

• Periodical: Materials Science Forum (Volume 1163)
• Pages: 91-99
• DOI: https://doi.org/10.4028/p-Cz9FQI
• Online since: October 2025
• Authors: Raul Radu Herci*, Lia Nicoleta Boțilă, Lavinia Ileana Sîrbu, Raluca Faur
• Keywords: Aluminum Alloy EN AW 7075, Submerged Friction Stir Processing SFSP

References

[1] Behrens, B. A., Hübner, S., Vogt, H., Golovko, O., Behrens, S., & Nürnberger, F. (2020, November). Mechanical properties and formability of EN AW-7075 in cold forming processes. In IOP Conference Series: Materials Science and Engineering (Vol. 967, No. 1, p.012017). IOP Publishing.

DOI: 10.1088/1757-899X/967/1/012017

[2] Peter, I., & Rosso, M. (2017). Study of 7075 aluminium alloy joints. Sci. Bull. Valahia Univ. Mater. Mech, 13, 7-11.

DOI: 10.1515/bsmm-2017-0011

[3] Wojdat, T., Kustroń, P., Jaśkiewicz, K., & Pabian, J. (2021). Study of Corrosion, Structural, and Mechanical Properties of EN AW-6082 and EN AW-7075 Welded Joints. Materials, 14(16), 4349.

DOI: 10.3390/ma14164349

[4] Microscop optic cu scanare Tescan VEGA LMU, din dotarea ISIM Timișoara. https://eertis.eu/erio-2200-000r-4252.

[5] Rathinasuriyan, C., & Senthil Kumar, V. S. (2015). Submerged friction stir welding and processing: Insights of other researchers. International Journal of Applied Engineering Research, 10(8), 6530-6536.

[6] Reschetnik, W., Brüggemann, J. P., Aydinöz, M. E., Grydin, O., Hoyer, K. P., Kullmer, G., & Richard, H. A. (2016). Fatigue crack growth behavior and mechanical properties of additively processed EN AW-7075 aluminium alloy. Procedia Structural Integrity, 2, 3040-3048.

DOI: 10.1016/j.prostr.2016.06.380

[7] J. Ursinus, A. Koch, K. Brunotte, F. Walther, B.A. Behrens, Microstructure analysis of hybrid aluminum parts from recycled EN AW-6082 and EN AW-7075 chips, Materials Research Proceedings Vol. 28 (2023) 1977-1986.

DOI: 10.21741/9781644902479-213

[8] D. Bakshi, C. Prakash, , S. Singh, R. Kumar, D. Ashri - A Detailed Study on Friction Stir Welding and Friction Stir Processing–A Review Paper, International Journal of Industrial Engineering & Technology ISSN 0974-3146 Volume 4 Number 1 (2014) 1-22. http://www.gbspublisher.com.

[9] Chandra, C. K., Sommer, N., Heider, B., Hatzky, M., Reitz, R., Böhm, S., & Oechsner, M. (2023). Influence of Friction Stir Weld Parameters on the Corrosion Susceptibility of EN AW‐7075 Weld Seam and Heat‐Affected Zone. Advanced Engineering Materials, 25(15), 2300130.

DOI: 10.1002/adem.202300130

[10] Heidarzadeh, A., Javidani, M., Mofarrehi, M., Farzaneh, A., & Chen, X. G. (2021). Submerged dissimilar friction stir welding of AA6061 and AA7075 aluminum alloys: Microstructure characterization and mechanical property. Metals, 11(10), 1592.

DOI: 10.3390/met11101592