Abstract
The effects of the sintering holding time and cooling rate on the microstructure and mechanical properties of nanocrystalline Fe-Cr-C alloy were investigated. Nanocrystalline Fe-1.5Cr-1C (wt.%) alloy was fabricated by mechanical alloying and spark plasma sintering. Different process conditions were applied to fabricate the sintered samples. The phase fraction and grain size were measured using X-ray powder diffraction and confirmed by electron backscatter diffraction. The stability and volume fraction of the austenite phase, which could affect the mechanical properties of the Fe-based alloy, were calculated using an empirical equation. The sample names consist of a number and a letter, which correspond to the holding time and cooling method, respectively. For the 0A, 0W, 10A, and 10W samples, the volume fraction was measured at 5.56, 44.95, 6.15, and 61.44 vol.%. To evaluate the mechanical properties, the hardness of 0A, 0W, 10A, and 10W samples were measured as 44.6, 63.1, 42.5, and 53.8 HRC. These results show that there is a difference in carbon diffusion and solubility depending on the sintering holding time and cooling rate.
Go to article
Bibliography
[1] E . Yajima, T. Miyazaki, T. Sugiyama, H. Terajima, Trans. JIM 15, 173 (1974).
[2] E .C. Santos, K. Kida, T. Honda, J. Rozwadowska, K. Houri, Adv. Mater. Res. 217, 982 (2011).
[3] I . Yoshida, K. Yamamoto, K. Domura, K. Mizobe, K. Kida, Mater. Sci. Forum 867, 55 (2016).
[4] O . Grassel, L. Kruger, G. Frommeyer, L.W. Meyer, Int. J. Plast. 16, 1391 (2000).
[5] G. Frommeyer, U. Brux, P. Neumann, ISIJ Int. 43, 438 (2003).
[6] D.S. Park, S.J. Oh, I.J. Shon, S.J. Lee, Arch. Metall. Mater. 63, 1479 (2018).
[7] S.G. Choi, J.H. Jeon, N.H. Seo, Y.H. Moon, I.J. Shon, S.J. Lee, Arch. Metall. Mater. 65, 1001 (2020).
[8] S.J. Lee, S. Lee, B.C. De Cooman, Scr. Mater. 64, 649 (2011).
[9] Y. Sakuma, O. Matsumura, H. Takechi, Met. Trans. A 22, 489 (1991).
[10] Y. Matsuoka, T. Iwasaki, N. Nakada, T. Tsuchiyama, S. Takaki, ISIJ Int. 53, 1224 (2013).
[11] K. Sugimoto, M. Misu, M. Kobayashi, H. Shirasawa, ISIJ Int. 33, 775 (1993).
[12] S.J. Lee, S. Lee, B.C. De Cooman, Int. J. Mater. Res. 104, 423 (2013).
[13] J.S. Benjamin, T.E. Volin, Met. Trans. 5, 1929 (1974).
[14] S.I. Cha, S.H. Hong, B.K. Kim, Mater. Sci. Eng. A 351, 31 (2003).
[15] H .W. Zhang, R. Gopalan, T. Mukai, K. Hono, Scr. Mater. 53, 863 (2005).
[16] G.K. Williamson, W.H. Hall, Acta Metall. 1, 22 (1953).
[17] B.L. Averbach, M. Cohen, Trans. AIME 176, 401 (1948).
[18] H . Luo, J. Shi, C. Wang, W. Cao, X. Sun, H. Dong, Acta Mater. 59, 4002 (2011).
[19] S.J. Oh, J.H. Jeon, I.J. Shon, S.J. Lee, J. Korean Powder Metall. Inst. 26, 389 (2019).
[20] I . Seki, K. Nagata, ISIJ Int. 45, 1789 (2005).
[21] G. Dini, R. Ueji, A. Najafizadeh, S.M. Monir-Vaghefi, Mater. Sci. Eng. A 527, 2759 (2010).
[22] F. Martin, C. Garcia, Y. Blanco, M.L. Rodriguez-Mendez, Mater. Sci. Eng. A 642, 360 (2015).
Go to article
en
pl
