Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy
Abstract
:1. Introduction
2. Experimental Procedures
2.1. Materials
2.2. Surface Treatment
2.3. Ultrasonic Fatigue Test
2.4. Observation of Microstructure at the Crack Initiation Site
3. Results and Discussion
3.1. S-N Characteristics
3.2. Fatigue Crack Initiation Analysis
3.3. Effect of Basketweave on Fatigue Fracture Mechanism
3.4. Effect of Basketweave on Fatigue Life
4. Conclusions
- (1)
- Step-wise S-N characteristics are observed on a TC21 titanium alloy with two sizes of basketweave over 105–109 cycle regimes. The fatigue property of the alloy with basketweave of 40 μm is higher than that of 60 μm.
- (2)
- Fatigue crack initiates from the surface α/β phase interface at a relatively high stress amplitude, whereas the fatigue crack site appears at the sample subsurface at a relatively low stress amplitude; α/β lamellar characteristic is present at the crack initiation site of the alloy where FGA is found alongside basketweave.
- (3)
- Very high cycle fatigue limits of TC21 titanium alloy with basketweave microstructure are evaluated based on the Murakami model, which are consistent with the experimental results. The fatigue life of TC21 titanium alloy is well predicted using tan energy-based crack nucleation life model.
Author Contributions
Funding
Conflicts of Interest
References
- Zheng, Y.; Zhao, Z.H.; Zhang, Z.; Zong, W.; Dong, C. Internal crack initiation characteristics and early growth behaviors for very-high-cycle fatigue of a titanium alloy electron beam welded joints. Mater. Sci. Eng. A 2017, 706, 311–318. [Google Scholar] [CrossRef]
- Nie, B.; Zhao, Z.; Ouyang, Y.; Chen, D.; Chen, H.; Sun, H.; Liu, S. Effect of low cycle fatigue predamage on very high cycle fatigue behavior of TC21 titanium alloy. Materials 2017, 10, 1384. [Google Scholar] [CrossRef] [PubMed]
- Nie, B.; Zhao, Z.; Liu, S.; Chen, D.; Ouyang, Y.; Chen, H.; Fan, T.; Sun, H. Very high cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ4. Materials 2018, 11, 98. [Google Scholar] [CrossRef] [PubMed]
- Wu, Y.; Liu, J.R.; Wang, H.; Guan, S.X.; Yang, R.; Xiang, H.F. Effect of stress ratio on very high cycle fatigue properties of Ti-10V-2FE-3Al alloy with duplex microstructure. J. Mater. Sci. Technol. 2017. [Google Scholar] [CrossRef]
- Zuo, J.H.; Wang, Z.G.; Han, E.H. Effect of microstructure on ultra-high cycle fatigue behavior of Ti-6Al-4V. Mater. Sci. Eng. A 2008, 473, 147–152. [Google Scholar] [CrossRef]
- Sushant, K.J.; Christopher, J.S.; Patrick, J.G.; William, J.P.; Reji, J. Characterization of fatigue crack-initiation facets in relation to lifetime variability in Ti-6Al-4V. Int. J. Fatigue 2012, 42, 248–257. [Google Scholar]
- McEvily, A.J.; Nakamura, T.; Oguma, H.; Yamashita, K.; Matsumnaga, H.; Endo, M. On the mechanism of very high cycle fatigue in Ti-6Al-4V. Scr. Mater. 2008, 59, 1207–1209. [Google Scholar] [CrossRef]
- Oguma, H.; Nakamura, T. The effect of microstructure on very high cycle fatigue properties in Ti-6AL-4V. Scr. Mater. 2010, 63, 32–34. [Google Scholar] [CrossRef]
- Szczepanski, C.J.; Jha, S.K.; Larsen, J.M.; Jones, J.W. Microstructural influences on very-high-cycle fatigue-crack initiation in Ti-6246. Metall. Mater. Trans. A 2008, 39, 2841–2851. [Google Scholar] [CrossRef]
- LeBiavant, K.; Pommier, S.; Prioul, C. Local texture and fatigue crack initiaton in a Ti-6Al-4V. Fatigue Fract. Eng. Mater. Struct. 2002, 25, 527–545. [Google Scholar] [CrossRef]
- Sinha, V.; Spowart, J.E.; Mills, M.J.; Williams, J.C. Observations on the faceted initiation site in the dwell-fatigue tested Ti-6242 alloy: Crystallographic orientation and size effects. Metall. Mater. Trans. A 2006, 37, 1507–1518. [Google Scholar] [CrossRef]
- Ravi Chandran, K.S.; Jha, S.K. Duality of the S-N fatigue curve caused by competing failure modes in a titanium alloy and the role of Poisson defect statistics. Acta Mater. 200, 53, 1867–1881. [Google Scholar] [CrossRef]
- Liu, X.L.; Sun, C.Q.; Hong, Y.S. Faceted crack initiation characteristics for high-cycle and very-high-cycle fatigue of a titanium alloy under different stress ratios. Int. J. Fatigue 2016, 92, 434–441. [Google Scholar] [CrossRef]
- Pan, X.; Su, H.; Sun, C.; Hong, Y. The behavior of crack initiation and early growth in high-cycle and very high-cycle fatigue regimes for a titanium alloy. Int. J. Fatigue 2018. [Google Scholar] [CrossRef]
- Crupi, V.; Epasto, G.; Guglielmino, E.; Squillace, A. Influence of microstructure [alpha + beta and beta] on very high cycle fatigue behaviour of Ti-6Al-4V alloy. Int. J. Fatigue 2017, 95, 64–75. [Google Scholar] [CrossRef]
- Yang, K.; He, C.; Huang, Q.; Huang, Z.Y.; Wang, C.; Wang, Q.Y.; Liu, Y.L.; Zhong, B. Very high cycle fatigue behaviors of a turbine engine blade alloy at various stress ratios. Int. J. Fatigue 2017, 99, 35–43. [Google Scholar] [CrossRef]
- Bathias, C. Piezoelectric fatigue testing machines and devices. Int. J. Fatigue 2006, 28, 1438–1445. [Google Scholar] [CrossRef]
- Li, W.; Zhao, H.Q.; Nehila, A.; Zhang, Z.Y.; Sakai, T. Very high cycle fatigue of TC4 titanium alloy under variable stress ratio: Failure mechanism and life prediction. Int. J. Fatigue 2017, 10, 342–354. [Google Scholar] [CrossRef]
- Zhang, S.Z.; Zeng, W.D.; Zhao, Q.Y.; Gao, X.X.; Wang, Q.J. High cycle fatigue of isothermally forged Ti-6.5Al-2.2Mo-2.2Zr-1.8Sn-0.7W-0.2Si with different microstructures. J. Alloys Compd. 2016, 689, 114–122. [Google Scholar] [CrossRef]
- Horstemeyer, M.F.; Farkas, D.; Kim, S.; Tang, T.; Potirniche, G. Nanostructurally small cracks (NSC): A review on atomistic modeling of fatigue. Int. J. Fatigue 2010, 32, 1273–1502. [Google Scholar] [CrossRef]
- Ranc, N.; Wagner, D.; Paris, P.C. Study of thermal effects associated with crack propagation during very high cycle fatigue tests. Acta Mater. 2008, 56, 4012–4021. [Google Scholar] [CrossRef]
- Wang, Q.Y.; Bathias, C.; Kawagoishi, N.; Kawagoishi, N.; Chen, Q. Effect of inclusion on subsurface crack initiation and gigacycle fatigue strength. Int. J. Fatigue 2002, 24, 1269–1274. [Google Scholar] [CrossRef]
- Murakami, Y.; Endo, M. Effects of defects, inclusion and inhomogeneities on fatigue strength. Int. J. Fatigue 1994, 16, 163–182. [Google Scholar] [CrossRef]
- Nie, B.H.; Zhang, Z.; Zhao, Z.H.; Zhong, Q.P. Very high cycle fatigue behavior of shot peening 3Cr13 high strength spring steel. Mater. Des. 2013, 50, 503–508. [Google Scholar] [CrossRef]
- Zhao, A.; Xie, J.; Sun, C.; Hong, Y. Prediction of threshold value for FGA formation. Mater. Sci. Eng. A 2011, 528, 6872–6877. [Google Scholar] [CrossRef]
- Richie, R.O.; Davidson, D.L.; Boyce, B.L.; Campbell, J.P.; Roder, O. High-cycle fatigue of Ti6Al4V. Fatigue Fract. Eng. Mater. Struct. 1999, 22, 621–631. [Google Scholar]
- Petit, J.; Sarrazin-Baudoux, C. An overview on the influence of the atmosphere environment on ultra-high-cycle fatigue and ultr-slow fatigue crack propagation. Int. J. Fatigue 2006, 28, 1471–1478. [Google Scholar] [CrossRef]
- Chapetti, M.D. Fatigue assessment using an integrated threshold curve method-applications. Eng. Fract. Mech. 2008, 75, 1854–1863. [Google Scholar] [CrossRef]
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Share and Cite
Nie, B.; Zhao, Z.; Chen, D.; Liu, S.; Lu, M.; Zhang, J.; Liang, F. Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy. Metals 2018, 8, 401. https://doi.org/10.3390/met8060401
Nie B, Zhao Z, Chen D, Liu S, Lu M, Zhang J, Liang F. Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy. Metals. 2018; 8(6):401. https://doi.org/10.3390/met8060401
Chicago/Turabian StyleNie, Baohua, Zihua Zhao, Dongchu Chen, Shu Liu, Minsha Lu, Jianglong Zhang, and Fangming Liang. 2018. "Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy" Metals 8, no. 6: 401. https://doi.org/10.3390/met8060401