Effect of Forging Processes on the Microstructure and Mechanical Properties of High Temperature Titanium Alloy Containing Erbium

Abstract:

A new high-temperature titanium alloy containing erbium was designed and fabricated. The influence of α+β forging process and β forging process on microstructure and mechanical properties of the alloy was studied. The microstructure, mechanical properties and fracture morphologies of the new high-temperature titanium alloy after different forging processes were characterized. The results showed that the forging process significantly affected the microstructure of the alloy. The alloy exhibits nearly equiaxed microstructure and lamellar microstructure after α+β and β forging, respectively. In addition, there were Er-rich phases in both forged alloys. The alloy with nearly equiaxed microstructure acquired a satisfactory comprehensive performance. However, the alloy with lamellar microstructure had higher strength and less plasticity. The tensile fracture of the alloy after α + β forging had more dimples, while cleavage plane was obvious in the alloy after β forging. Owing to the addition of erbium and the formation of Er-rich phases, forged alloys possess excellent strength. The Er-rich phase might be the main reason for the fracture.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 592-597
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.592
• Online since: June 2017
• Authors: Zhen Qiang Wang*, Bo Long Li, Tong Bo Wang, Zuo-Ren Nie
• Keywords: Er-Rich Phase, Forging Process, Mechanical Properties, Microstructure

References

[1] C. Leyens, M. Peters. Titanium and Titanium Alloys. Wiley-VCH, Weinheim, (2003).

[2] Dipankar Banerjee, J.C. Williams. Perspectives on Titanium Science and Technology. Acta Materialia. 2013, 61: 844-879.

DOI: 10.1016/j.actamat.2012.10.043

[3] P. A. Blenkinsop, in: G. Lutjering, U. Zwicker, W. Bunk(Eds. ), Proceedings of the Fifth International Conference on Titanium, Oberursel, West Germany, Deutsche Gesellschaft fuer Metallkunde, Munich, West Germany, 1985, 2323–2338.

[4] P. J. Bania, in: P. Lacombe, R. Tricot, G. Béranger (Eds. ), Sixth World Conference on Titanium, Les Editions de Physique, Cannes, France, 1988, 825–830.

[5] S.Z. Zhang, H.Z. Xu, Z.Q. Liu. Effect of carbon on silicide precipitates during ageing of Ti-60 titanium alloy. Chinese Journal of Materials Research. 2005. 19 (5): 499-505.

[6] Q. Hong, Y.H. Qi, Y.Q. Zhao, G.J. Yang. Effect of Rolling Process on Microstructure and Properties of Ti600 Alloy Plates. Rare Metal Materials and Engineering. 2005, 34 (8): 1334-1337.

[7] X.Y. Shi, B.Q. Fu, W.S. Wang, X.D. Tang, X.M. Chen．Effect of forging temperature on mechanical property and microstructure of TC4-DT titanium [J]. The Chinese Journal of Nonferrous Metals, 2010, 20(S1): 79.

[8] J.Y. He, D.F. Li, H.S. Chen，J. Shen, Y. H. Zhao．Microstructures and mechanical properties of TB2 forgings [J]. Rare Metal Materials and Engineering, 2006, 35(S2): 152.

[9] Y.M. Wang．Effect of forging process on structure and properties of titanium alloy TA5 [J]. Rare Metals Letters, 2007, 26(8): 35.

[10] B.S. Wang, W.J. Jia, W.M. Qu, H.Q. Yu, Y.G. Zhou, W.D. Zeng. Influence of forging processes on microstructure and mechanical properties of Ti60 alloy. Titanium Ind Prog 2011, 28: 8-11.

[11] Y.X. Du，F. Hao J.W. Lei Y.S. Gao，Z. An，S.Q. Li，X.H. Liu. Study on influence of forging process on microstructure and properties of titanium alloy TA12A. Forging & Stamping technology. 2015, 40(8): 124-127.

[12] J.C. Williams, G. Luetjering. The effect of slip length and slip character on the properties of titanium alloys/ Kimma U Izumi O. Titanium' 80 Science and Technology. Kyoto Metallurgical Society of AME. 1980, 671-681.