Study on Surface Nanocrystallization of TiAl Alloys Induced by HEBMT

Abstract:

Utilize the high-energy ball milling techniques (HEBMT) to get a certain thickness of the nanocrystalline layer in gradient structure on TiAl-based alloys surface, while using X-ray diffraction and electron microscopy techniques to analyze the microscopic structure of the surface and study its variation along the depth direction. The results show that through HEBMT, the sample surface can get nanocrystallization and its nano-grain size can be refined to less than 10nm while having a 15μm nanocrystalline layer. Nanoindentation tests show that the surface hardness of the samples after HEBMT can be significantly increased from 340HV to 922HV.

• Periodical: Applied Mechanics and Materials (Volumes 184-185)
• Pages: 1250-1254
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.184-185.1250
• Online since: June 2012
• Authors: Tian Hang Yao, Wei Zhang, Yong Liu, Ming Yang Zhang, Di Ni Wang
• Keywords: High-Energy Ball Milling, Microhardness, Microstructure, Surface Nanocrystallization, TiAl-Based Alloy

References

[1] K. Lu, J. Lu, Mater. Sci. Eng., A Struct. Mater.: Prop. Microstruct. Process. 38 (2004) 375-377.

[2] Hongtao Wang, Wei Yang. Mechanical Behavior of Nanocrystalline Metals. Advancesin Mechanics 2004, pp.314-326.

[3] Ke Lu, Jian Lu. Mechanical way and special equipment for formation of nanostructures. CN 01122980. 2, 200−02−20.

[4] N.R. Tao, Z.B. Wang, W.P. Tong, M.L. Sui, J. Lu, K. Lu. An investigation of surface nanocrystallization mechanism in Fe by surface mechanical attrition treatment. Acta Mater. 50 (2002) 4603-4616.

DOI: 10.1016/s1359-6454(02)00310-5

[5] Z.B. Wang, N.R. Tao. Effect of surface nanocrystallization on friction and wear properties in low carbon steel. Mater Sci & Eng A 352 (2003) 144-149.

[6] G. Liu, J. Lu, K. Lu. Surface nanocrystallization of 316 stainless steel induced by ultrasonic shot peening. Mater Sci & Eng A 286 (2000) 91-95.

DOI: 10.1016/s0921-5093(00)00686-9

[7] Lu, J.Z., et al., Grain refinement of LY2 aluminum alloy induced by ultra-high plastic strain during multiple laser shock processing impacts. Acta Mater. 58 (2010) 3984-3994.

DOI: 10.1016/j.actamat.2010.03.026

[8] Z.B. Wang, J. Lu, K. LU. Chromizing behaviors of a low carbon steel processed by means of surface mechanical attrition treatment. Acta Mater. 53 (2005) 2081-(2089).

DOI: 10.1016/j.actamat.2005.01.020

[9] W.P. Tong, N.R. Tao, Z.B. Wang, J. Lu, K. Lu. Nitriding iron and 38CrMoAl steel with a nanostructrued surface layer. Journal of the Graduate School of the Chinese Academy of Science 22 (2005) 230-238.

[10] Jianhua Jiang, Jiangwei Ren. Surface nanocrystallization of Ni3Al by surface mechanical attrition treatment. Mater Sci & Eng A 520 (2009) 80-89.

DOI: 10.1016/j.msea.2009.05.009

[11] J.B. Andrew, H.D. Kessler. Manganese and niobium-modified titanium aluminum alloys. Journal of Metsis 10 (1956) 1348-1353.

[12] Y.Y. Chen, F.T. Kong, J.C. Han, Z.Y. Chen, J. Tian. Influence of yttrium on microstructure, mechanical properties and deformability of Ti-43Al-9V alloy. intermetallics, 13 (2005) 263-266.

DOI: 10.1016/j.intermet.2004.07.014

[13] E.A. Loria. Gamma titanium aluminides as prospective structural materials. Intermetallics 8 (2000) 1339-1345.

DOI: 10.1016/s0966-9795(00)00073-x

[14] H.P. Klng, L.E. Alexander. X-ray Diffraction procedures for Polycrstalline and Amorphous Materials，2nd Edition New York：Wiley, 1974；662.

[15] R.Z. Valiev, I.V. Alexandrov, W.A. Chiou, R.S. Mishra and A.K. Mukherjee. Comparative Structural Studies of nanocrystalline Materials Processed by Different Techniques. Materials Science Forum, 235-238 (1996) 497-506.

DOI: 10.4028/www.scientific.net/msf.235-238.497

[16] K.Y. Zhu, A. Vassel, F. Brisset, K. Lu . J Lu. Nanostructure formation mechanism of α-titanium using SMAT. Acta Mater. 52 (2004) 4101-4110.

DOI: 10.1016/j.actamat.2004.05.023