Microstructure,nano-mechanical characterization,and fretting wear behavior of plasma surface Cr-Nb alloying on γ-TiAl

Abstract

In this study, surface Cr-Nb alloying was realized on γ-TiAl using double glow plasma hollow cathode discharge technique. An inter-diffusion layer was generated under the surface, composed of Cr₂Nb intermetallic compounds. After Cr-Nb alloying, the surface nanohardness of γ-TiAl increased from 5.65 to 11.61 GPa. The surface H/E and H³/E² increased from 3.37 to 5.98 and from 0.64 to 4.15, respectively. Cr-Nb alloying and its effect on fretting wear were investigated. The surface treatment resulted in improved plastic deformation and fretting wear resistance of γ-TiAl. The fretting wear test showed that an average friction coefficient of γ-TiAl against Si₃N₄ ball was significantly decreased after Cr-Nb alloying. The fluctuation of friction coefficient during running-in stage was significantly improved. The friction behavior of both γ-TiAl before and after Cr-Nb alloying could be divided into distinctive stages including formation of debris, flaking, formation of crack, and delamination. It was observed that the high hardness, resistance to plastic deformation, and fatigue resistance of γ-TiAl after Cr-Nb alloying could inhibit the formation of debris and delamination during friction test. The fretting wear scar area and the maximum wear scar depth were decreased, indicating that the wear resistance of γ-TiAl has been greatly improved after Cr-Nb alloying. The results indicated that plasma surface Cr-Nb alloying is an effective way for improving the fretting wear resistance of γ-TiAl in aviation area.

Keywords

Cr-Nb alloying fretting wear double glow plasma surface metallurgy technology γ-TiAl

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References

Cheng

Yuan

, et al. Effect of TiB2 on dry-sliding tribological properties of TiAl intermetallics. Tribol Int 2013; 62: 91–99.

Miyoshi

Lerch

Draper

. Fretting wear of Ti-48Al-2Cr-2Nb. Tribol Int 2003; 36: 145–153.

Cheng

Fei

Zhu

, et al. Electrochemical corrosion and tribological evaluation of TiAl alloy for marine application. Tribol Int 2017; 115: 483–492.

Palaniappan

Cole

Caballero-Briones

, et al. Neodymium-decorated graphene oxide as a corrosion barrier layer on Ti6Al4V alloy in acidic medium. RSC Adv 2019; 9: 8537–8545.

Zhang

, et al. Corrosion resistance and interfacial morphologies of a high Nb-containing TiAl alloy with and without thermal barrier coatings in molten salts. Corros Sci 2019; 156: 139–146.

Wang FB, Wang G, Ji L, et al. Effects of different temperatures on the lamellar structure evolution in γ-TiAl alloys: a phase-field study. Computational Materials Science 2019; 164: 22–30.

Zhang XJ, Li Q, Zhao SY, et al. Improvement in the oxidation resistance of a γ-TiAl-based alloy by sol–gel derived Al₂O₃ film. Applied Surface Science 2008; 255: 1860–1864.

Yoshihara M and Kim Y. Oxidation behavior of gamma alloys designed for high temperature applications. Intermatallics 2005; 13: 952–958.

Shanabarger MR. Comparative study of the initial oxidation behavior of a series of titanium–aluminum alloys. Applied Surface Science 1998; 179–186.

10.

Mishin Y and Herzig C. Overview no. 136 diffusion in the Ti ± Al system. Acta Materialia 2000; 48(3): 589–623.

11.

Qiu J, Fu Z, Liu B, et al. Effects of niobium particles on the wear behavior of powder metallurgical γ-TiAl alloy in different environments. Wear 2019; 434–435.

12.

Mitoraj M and Godlewska EM. Oxidation of Ti e 46Al-8Ta in air at 700 ℃ and 800 ℃ under thermal cycling conditions. Intermatallics 2013; 34: 112–121.

13.

Isothermal oxidation behavior and microstructure of plasma surface Ta coating on ÃŽÂ³-TiAl.pdf. Materials Characterization 2014; 98: 54–59.

14.

Popela

Kubásek

Maixner

, et al. Comparison of Nb- and Ta-effectiveness for improvement of the cyclic oxidation resistance of TiAl-based intermetallics. Intermetallics 2011; 19: 493–501.

15.

Raluca

Friedle

Schütze

. Oxidation protection of γ-TiAl-based alloys – a review. Intermetallics 2015; 56: 1–14.

16.

Brotzu

Felli

Pilone

. Effect of alloying elements on the behaviour of TiAl-based alloys. Intermetallics 2014; 54: 176–180.

17.

Zhao

Zhang

, et al. Microstructural evolution of hot-forged high Nb containing TiAl alloy during high temperature tension. Mater Sci Eng A 2016; 678: 116–121.

18.

Pilone

Felli

Brotzu

. High temperature oxidation behaviour of TiAl-Cr-Nb-Mo alloys. Intermetallics 2013; 43: 131–137.

19.

Lin

Zhao

, et al. Effect of Nb on oxidation behavior of high Nb containing TiAl alloys. Intermetallics 2011; 19: 131–136.

20.

Saage

Huang

, et al. Microstructures and tensile properties of massively transformed and aged Ti46Al8Nb and Ti46Al8Ta alloys. Intermetallics 2009; 17: 32–38.

21.

Zhang

, et al. High-temperature oxidation behavior of TiAl-based alloys fabricated by spark plasma sintering. J Alloy Compound 2009; 478: 220–225.

22.

Ismaeel

Wang

. Effect of Nb additions on microstructure and properties of γ-TiAl based alloys fabricated by selective laser melting. Trans Nonferr Met Soc China 2019; 29: 1007–1016.

23.

Wang

Tang

. Effect of chromium on the oxidation resistance of TiAl intermetallics. Oxid Met 1997; 48: 381–390.

24.

Wei

Zhang

, et al. Sliding wear behaviour of Ni-Cr alloying on Ti6Al4V based on double-glow plasma surface metallurgy technology. Mater Res Exp 2018; 5: 1–14.

25.

Wei

Zhang

Yao

, et al. Oxidation behaviour of plasma surface alloying on Ti6Al4V alloy oxidation behaviour of plasma surface alloying on Ti6Al4V alloy. Surf Eng 2016; 844: 14–21.

26.

Zhong

Fang

Zheng

, et al. A novel plasma surface metallurgy: Xu-Tec process. Surf Coat Technol 1990; 43–44: 1065–1073.

27.

Ciavarella

Demelio

. A review of analytical aspects of fretting fatigue, with extension to damage parameters, and application to dovetail joints ⋆. Int J Solid Struct 2001; 38: 1791–1811.

28.

Liang

Liu

Wang

. State-of-the-art of surface integrity induced by tool wear effects in machining process of titanium and nickel alloys: a review. Measurement 2019; 132: 150–181.

29.

Ederveen

, et al. Design of low hardness abrasion resistant steels. Wear 2013; 301: 89–93.

30.

Qiu

Wei

, et al. Dependence of fretting wear resistance on microstructural features of alloyed steels. Tribiol Int 2019; 137: 39–45.

31.

Wei

Zhang

Yao

, et al. Double glow plasma surface Cr-Ni alloying of Ti6Al4V alloys: mechanical properties and impact of preparing process on the substrate. Vacuum 2018; 155: 233–241.

32.

Chen

Zhang

Wei

, et al. Tribological behavior of aluminum slurry coating on 300M steel. J Mater Eng Perform 2017; 26: 3719–3727.

33.

Peng

Wen

, et al. Nanoindentation creep behavior in a CoCrFeCuNi high-entropy alloy film with two different structure states. Mater Sci Eng A 2015; 621: 111–117.

34.

Kumar

Raman

SGS

Narayanan

TSNS

, et al. Influence of counterbody material on fretting wear behaviour of surface mechanical attrition treated Ti-6Al-4V. Tribol Int 2013; 57: 107–114.

35.

Iqbal

Merah

Nouari

, et al. Investigation of wear characteristics of spark plasma sintered W-25wt % Re alloy and W-25wt%Re-3.2wt%HfC composite. Tribol Int 2017; 116: 129–137.

36.

Shi

Liskiewicz

Beake

, et al. Fretting wear behavior of graphite-like carbon films with bias-graded deposition. Appl Surf Sci 2019; 494: 929–940.

37.

Leyland

Matthews

. On the significance of the H/E ratio in wear control: a nanocomposite coating approach to optimised tribological behaviour. Wear 2000; 246: 1–11.

38.

Duan

Zhang

Wei

, et al. Effects of elements W and C on microstructure and wear property of Î³-TiAl surface alloying layer. Surf Eng 2014; 31: 942–948.