Effect of ceramic conversion surface treatment on fatigue properties of Ti6Al4V alloy

Li, C.X.; Horspool, Dean; Dong, Hanshan

doi:10.1016/j.ijfatigue.2006.11.016

Cited by 19 publications

(14 citation statements)

References 5 publications

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“…Some micro-cracks on the subsurface gradually extended to the free surface, resulting in the patch delamination in the fretting contact zones of BM and Cr-Ti samples. More importantly, some micro-cracks initiated from the fretting contact zones expanded to the inner material under the tangential force and fatigue stress [12,21]. The fretting cracks initiated in a large region rather than a point, in the case of PF.…”

Section: Effects Of the Cr-alloyed And Cr-ti Solid-solutionmentioning

confidence: 98%

“…In addition, the Cr-Ti solid-solution layer had a low hardness and strength, indicating a low resistance to fatigue crack initiation. Crack initiation is closely related to dislocation movements under alternating shear stresses; the higher the strength of a material is, the less the possibility of dislocation movement is [12].…”

Section: Wear Behaviormentioning

confidence: 99%

“…9). High residual compressive stress could inhibit crack initiation and delay crack propagation and thus prolong the fatigue life [10,12,17]. A comparison between the Ti6Al4V base material and the Cr-Ti sample reveals that Cr doping in Ti changed the chemical composition, microstructure and hardness of the surface layer.…”

Section: Plain Fatigue Propertiesmentioning

confidence: 99%

“…To solve the problem of FF damage, the anti-wear and anti-fatigue properties of Ti alloys should be simultaneously improved. Surface hardening treatments can improve the wear resistance remarkably [6][7][8] but often reduce the fatigue resistance, owing to the low toughness of the hardened surface [9][10][11][12], making it difficult to solve the anti-wear and anti-fatigue issues through a single surface treatment.…”

Section: Introductionmentioning

confidence: 99%

“…Tsuji et al [10] and Li et al [12] induced residual compressive stress via shot peening to recover the previously reduced fatigue properties of Ti alloys treated through plasma carburizing or thermal oxidation. However, these hard compound layers (i.e., TiC or TiO 2 ) were prone to crack or flake when combined with a surface deformation treatment, due to their poor toughness.…”

Section: Introductionmentioning

confidence: 99%

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

Liu

Zhang

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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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.

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Section: Effects Of the Cr-alloyed And Cr-ti Solid-solutionmentioning

confidence: 98%

Section: Wear Behaviormentioning

confidence: 99%