February 2022 Volume 4

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Microhardness:

FORGING RESEARCH

Sample Minimum Maximum Mean SD HPM-T2 419.4 432 426.6 4.5 HPM-T4 449.7 451.4 450.7 0.4 HPM-TAR 419.4 421.9 420.8 1.1 HPM-TQR 419.4 421.9 420.7 2.5

HPA-TAR-003 HPA-TAR-003

There is not much change inmicrohardness of forged samples except HPM-T4-003 primarily due to refined grain structure as compared to other samples. Grain Size: There is. not much change in microhardness of forged samples except HPM-T4-003 primarily due to refined grain structure as compared to other samples. Grain Size: Sample Grain Size (  m) ASTM Grain Size HPM-T2-003 5.12 12~13 HPM-T4-003 6.29 11~12 HPM-TAR-003 6.65 11~12 HPM-TQR-003 5.96 11~12 Conclusion: We have forged IN718 samples using 4 different processing parameters. The processing parameters play an important role in governing microstructure (grain size), microhardness, and stress ruptur behavior of these alloys. HPM-T4-003 alloy exhibited higher microhardness and also passed stress rupture test performed according to ASTM E112-13. Conclusion: We have forged IN718 samples using 4 different processing parameters. The processing parameters play an important role in governing microstructure (grain size), microhardness, and stress rupture behavior of these alloys. HPM-T4-003 alloy exhibited higher microhardness and also passed stress rupture test performed according to ASTME112-13. References: 1. Anbarasan, N., Bikash Kumar Gupta, S. Prakash, P. Muthukumar, R. Oyyaravelu, R. John Felix Kumar, and S. Jerome. "Effect of heat treatment on the microstructure and mechanical properties of Inconel 718." Materials Today: Proceedings 5, no. 2 (2018): 7716-7724. 2. Koul, A. K., P. Au, N. Bellinger, R. Thamburaj, W. Wallace, and J. P. Immarigeon. "Development of a damage tolerant microstructure for Inconel 718 turbine disc material." Superalloys 1988 (1988): 3-12. 3. Akca, Enes, and Ali Gürsel. "A review on superalloys and IN718 nickel-based INCONEL superalloy." Periodicals of engineering and natural sciences 3, no. 1 (2015). 4. Mukhtarov, Sh, and A. Ermachenko. "Mechanical properties of nanostructured nickel based superalloy Inconel 718." In Journal of Physics: Conference Series, vol. 240, no. 1, p. 012118. IOP Publishing, 2010. 5. Nielsen, D. R., S. W. Thompson, C. J. Van Tyne, and M. C. Mataya. "Grain size control in ring-rolled alloy 718." Master's thesis, advisor: C. J. Van Tyne, Dept. of Metallurgical and Materials Engineering. Colorado School of Mines, 1993.

2000X

5000X

10 µ m

20 µ m

10000X

25000X

5 µ m

2 µ m

HPM-TQR-003 H -TQR-003