Production of Nanostructured Fasteners with High Shear and Fatigue Strength for Using in Aircraft Components
Production of Nanostructured Fasteners with High Shear and Fatigue Strength for Using in Aircraft Components
Multi-axis forging (MAF) and cyclic heat treatment are among the most widely used and easy to apply grain refinement methods. In this study, micro-alloyed steel samples were first subjected to MAF treatments at 880° C. Microstructural analysis showed that the average grain size, which was 13.2 µm initially, decreased to 11.2 µm application of the MAF. As a second-grain refinement technique, cyclic heat treatment was used. Samples were subjected to 1, 3, 5, 7, and 10 cyclic quenching. With this method, it was observed that the average grain size decreased to 2,3 µm. The mechanical tests showed that the second MAF process increased the yield and tensile strength of the material by about 16% while decreasing the elongation by %2. These tests also presented cyclic quenching increased tensile strength of the samples after the first application.
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- Baker, T.N. (2009). Processes, microstructure and properties of vanadium microalloyed steels. Materials Science and Technology, 25(9), 1083-1107.
- Baker, T.N. (2016). Microalloyed steels. Ironmaking & Steelmaking, 43(4), 264-307.
- Baker, T.N. (2019), Titanium microalloyed steels. Ironmaking & Steelmaking, 46(1), 1-55.
- Cao, J.-c., et al. (2007). Effect of Niobium on Isothermal Transformation of Austenite to Ferrite in HSLA Low-
Carbon Steel. Journal of Iron and Steel Research, International, 14(3), 52-56.
- Chen, Y., et al. (2013). Effect of dissolution and precipitation of Nb on the formation of acicular ferrite/bainite
ferrite in low-carbon HSLA steels. Materials Characterization, 84, 232-239.
- Davis, J. R., Alloying (2001). Understanding the Basics. ASM International: Materials Park, 193-209.
- Dewi, H.S., Volpp J., & Kaplan A.F.H. (2020). Short thermal cycle treatment with laser of vanadium microalloyed
steels. Journal of Manufacturing Processes, 57, 543-551.
- Huang, J. and Z. Xu (2006). Evolution mechanism of grain refinement based on dynamic recrystallization in
multiaxially forged austenite. Materials Letters, 60(15), 1854-1858.
- Lagneborg, R., et al. (1999). Role of vanadium in microalloyed steels. Scandinavian Journal of Metallurgy, 28,186-
241.
- Ledermueller, C., et al. (2020). Microalloying effects of Mo versus Cr in HSLA steels with ultrafine-grained ferrite
microstructures. Materials & Design, 185, 108278.
- Li, X., et al. (2020). Acquiring a low yield ratio well synchronized with enhanced strength of HSLA pipeline steels
through adjusting multiple-phase microstructures. Materials Science and Engineering: A, 785, 139350.
- Majta, J. & Muszka K. (2007). Mechanical properties of ultra fine-grained HSLA and Ti-IF steels. Materials Science
and Engineering: A, 464(1): p. 186-191.
- Nakao, Y. & Miura H. (2011). Nano-grain evolution in austenitic stainless steel during multi-directional forging.
Materials Science and Engineering: A, 528(3), 1310-1317.
- Ramesh, R., et al. (2020). Microstructural characterization and tensile behavior of Nd:YAG laser beam welded
thin high strength low alloy steel sheets. Materials Science and Engineering: A,780,139178.
- Ray, P.K., Ganguly R.I., & Panda A.K. (2003). Optimization of mechanical properties of an HSLA-100 steel through
control of heat treatment variables. Materials Science and Engineering: A, 346(1), 122-131.
- Shao, Y., et al. (2018). Formation mechanism and control methods of acicular ferrite in HSLA steels: A review.
Journal of Materials Science & Technology, 34(5), 737-744.
- Shi, R., et al. (2019). Microstructure evolution of in-situ nanoparticles and its comprehensive effect on high
strength steel. Journal of Materials Science & Technology, 35(9), 1940-1950.
- Singh, A.P. & Pant, G. (2020). Mechanical behaviour of vanadium microalloyed steel under control environment
compression. Materials Today: Proceedings, 26, 2525-2527.
- Song, R., et al. (2006). Overview of processing, microstructure and mechanical properties of ultrafine grained
bcc steels. Materials Science and Engineering: A, 441(1), 1-17.
- Vervynckt, S., et al. (2012). Modern HSLA steels and role of non-recrystallisation temperature. International
Materials Reviews, 57(4), 187-207.
- Wang, Q.F., et al. (2007). Refinement of Steel Austenite Grain Under an Extremely High Degree of Superheating.
Journal of Iron and Steel Research, International, 14(5), 161-166.
- Xia, X.-s., et al. (2013). Microstructure and mechanical properties of isothermal multi-axial forging formed AZ61
Mg alloy. Transactions of Nonferrous Metals Society of China, 23(11), 3186-3192.