A Comparison Study of Wear and Fretting Fatigue Behavior Between Cr-alloyed Layer and Cr-Ti Solid-solution Layer

doi:10.1007/s40195-016-0449-3

摘要/Abstract

Abstract:

This work reported a comparison between the wear and fretting fatigue (FF) behaviors of a Cr-alloyed layer and a Cr-Ti solid-solution layer. The hardness and toughness of both layers were evaluated to support this comparison. The results showed that the Cr-alloyed layer had high surface hardness but poor toughness, while the Cr-Ti solid-solution layer had excellent toughness but low hardness. The FF properties of the modified Ti6Al4V alloy depended on the trade-off between two factors: wear resistance and fatigue resistance. Although the Cr-alloyed layer could effectively resist the wear in fretting areas, its poor toughness caused the fatigue resistance to drop sharply and hence led to a premature failure in FF test. Due to the relatively good fatigue resistance, the Cr-Ti solid-solution layer had slightly higher FF life than that of the Cr-alloyed layer; however, its low hardness resulted in severe wear in correspondence with the fretting area and thus a failure to improve the FF properties of Ti6Al4V alloy. When combined with shot peening post-treatment, the FF life of both layers increased by about three times compared to that of the Ti6Al4V alloy. A further study showed that the poor toughness or low hardness still exerted negative influence on combination-treated samples.

Key words: Titanium alloy, Plasma chromizing, Shot peening, Fretting fatigue, Wear

. [J]. Acta Metallurgica Sinica (English Letters), 2016, 29(8): 782-792.

Shou-Ming Yu, Dao-Xin Liu, Xiao-Hua Zhang, Cheng-Song Liu. A Comparison Study of Wear and Fretting Fatigue Behavior Between Cr-alloyed Layer and Cr-Ti Solid-solution Layer[J]. Acta Metallurgica Sinica (English Letters), 2016, 29(8): 782-792.

图/表 14

Fig. 1 Schematic drawing of Ti6Al4V alloy fretting fatigue specimen and Ti6Al4V alloy fretting pad

Fig. 2 Cross-sectional structure a and composition depth profile b of the Cr-alloyed layer

Fig. 3 Cross-sectional hardness profiles of various surface-treated samples

Fig. 4 BSE images of the samples tested by static indentation at a load of 70 N or 150 N

Fig. 5 Variations in the friction coefficients of Ti6Al4V base material and various surface-treated samples with the function of sliding time

Fig. 6 Profiles of the wear tracks of Ti6Al4V base material and various surface-treated samples

Fig. 7 Worn surface morphologies of Ti6Al4V base material and various surface-treated samples

Fig. 8 Plain fatigue life of Ti6Al4V base material and various surface-treated samples at a stress of 700 MPa

Fig. 9 Residual stress versus depth profile of various surface-treated samples

Fig. 10 Fretting fatigue life of Ti6Al4V base material and various surface-treated samples

Fig. 11 Morphologies of the fretting contact zones a, c, e and fretting fatigue fracture surfaces b, d, f of the Ti6Al4V base material a, b, the sample with Cr-alloyed layer c, d and the sample with Cr-Ti solid-solution layer e, f

Fig. 12 Morphologies of the fretting contact zones a, c, e and the fretting fatigue fracture surfaces b, d, f of the shot peened samples: a, b BM + SP sample; c, d BM + Cr + SP sample; e, f Cr-Ti + SP sample

参考文献

[1]	A.S.M.Handbook, Titanium and Titanium Alloy Castings, vol. 2(ASM International, Almere, 1998), pp. 634-646
[2]	W.F. Brown, H. Mindlin, C.Y. Ho, Aerospace Structural Metals Handbook, vol. 4(CINDAS USAF Perdue University, Lafayette, 1997), p. 12
[3]	A. Molinari, G. Straffelini, B. Tesi, T. Bacci, Wear 208, 105 (1997)
[4]	K.G. Budinski, Wear 151, 203 (1991)
[5]	S.K. Bhaumik, R. Rangaraju, M.A. Venkataswamy, T.A. Bhaskaran, M.A. Parameswara, Eng. Fail. Anal. 9, 255(2002)
[6]	L. Benea, S.B. Basa, E. Danaila, N. Caron, O. Raquet, P. Ponthiaux, J.P. Celis, Mater. Des. 65, 550(2015)
[7]	J.C.A.B. Wilson, S.J. Wu, I. Gotman, J. Housden, E.Y. Gutmanas, Mater. Lett. 157, 45(2015)
[8]	N.M. Lin, H.Y. Zhang, J.J. Zou, B. Tang, Rev. Adv. Mater. Sci. 38, 61(2014)
[9]	L.C. Campanelli, L.T. Duarte, P.S.C. Mater. Des. 64, 393(2014)
[10]	N. Tsuji, S. Tanaka, T. Takasugi, Surf. Coat. Technol. 203, 1400(2009)
[11]	N. Tsuji, S. Tanaka, T. Takasugi, Mater. Sci. Eng. A 488, 139 (2008)
[12]	C.X. Li, D. Horspool, H. Dong, Int. J. Fatigue 29, 2273 (2007)
[13]	S.M. Yu, D.X. Liu, X.H. Zhang, D.X. Du, Appl. Surf. Sci. 353, 995(2015)
[14]	GB/T2965, Titanium and Titanium Alloy Bars (2007)
[15]	S.M. Yu, D.X. Liu, T.F. Cui, X.H. Zhang, Mater. Lett. 161, 724(2015)
[16]	T. Savas-kan, O. Bican, Tribol. Int. 43, 1346(2010)
[17]	X.H. Zhang, D.X. Liu, H.B. Tan, X.F. Wang, Surf. Coat. Technol. 203, 2315(2009)
[18]	N.F. Wear 267, 441 (2009)
[19]	N.M. Lin, F.Q. Xie, H.J. Yang, W. Tian, H.F. Wang, B. Tang, Appl. Surf. Sci. 258, 4960(2012)
[20]	G.Q. Wu, Z. Li, W. Sha, H.H. Li, L.J. Huang, Wear 309, 74 (2014)
[21]	G.Q. Wu, X.L. Liu, H.H. Li, W. Sha, L.J. Huang, Wear 326-327, 20(2015)
[22]	D.X. Liu, B. Tang, X.D. Zhu, H. Chen, J.W. He, J.P. Celis, Surf. Coat. Technol. 11-119, 234(1999)
[23]	R.B. Waterhouse, Fretting Fatigue: Theory of Fretting Process (Applied Sciences Publications Ltd., London, 1981), pp. 200-350