High cycle fatigue behaviour of Ti–6Al–4V fabricated by metal injection moulding technology

Ferri, Orley Milagres; Ebel, Thomas; Bormann, R.

doi:10.1016/j.msea.2008.10.039

Cited by 63 publications

(53 citation statements)

References 12 publications

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“…[13] It is also much lower than the endurance limit of %800 MPa obtained for the thermo-mechanically treated Ti-6Al-4V alloy with an equiaxed microstructure. [14] However, other recent investigations have shown that it is possible to increase the fatigue resistance of Ti-6Al-4V components produced by MIM technology by changing the surface quality [15] or by controlling specific processing parameters such as binder content [16] and powder particle size. [11] Nevertheless, better fatigue resistance is still desirable for MIM parts.…”

Section: Introductionmentioning

confidence: 99%

The Influence of a Small Boron Addition on the Microstructure and Mechanical Properties of Ti‐6Al‐4V Fabricated by Metal Injection Moulding

2011

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The effect of boron additions on the sintering behavior, microstructural development, and mechanical properties of a Ti‐6Al‐4V alloy fabricated by metal injection moulding (MIM) was studied. The addition of boron promotes a significant refinement of the microstructure by changing the microstructure from the typical lamellar to a more equiaxed morphology. The presence of both features: α colonies and α grains were confirmed by electron backscatter diffraction (EBSD) experiments. Furthermore, the pinning effect of TiB particles on grain boundary motion enhances the densification process due to the fact that the separation of pores and grain boundaries is suppressed. As a result of the refinement of the microstructure achieved by adding 0.5 wt% boron to the Ti‐6Al‐4V alloy, excellent tensile (σ0.2 = 787 MPa, UTS = 902 MPa and ε = 12%) and fatigue (endurance limit = 640 MPa) properties were obtained.

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Section: Introductionmentioning

confidence: 99%

The Influence of a Small Boron Addition on the Microstructure and Mechanical Properties of Ti‐6Al‐4V Fabricated by Metal Injection Moulding

2011

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“…The static mechanical properties of injection molded titanium alloy compacts have been reported so far [19][20][21]; however, there are few reports regarding the dynamic fracture characteristics [22,23]. As the dynamic fatigue behavior is of great importance in practical use, fatigue characteristics of injection molded Ti alloy compacts are reviewed.…”

Section: Fatigue Properties Of Ti Alloys Fabricated By Mimmentioning

confidence: 99%

Metal Injection Molding (MIM) Processing

Miura

Osada

Itoh

2015

Springer Series in Biomaterials Science and Engineering

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Complex-shaped components can be obtained by net or near-net shaping through the powder metallurgy processing route such as metal injection molding (MIM) process. MIM is an advanced powder processing technique for the mass production of complex-shaped components. This technology also reduces the material used for production and processing cost. Sintered compacts obtained by MIM process show high density over 95 % and excellent mechanical properties. Titanium and its alloys are used in biomedical applications because of their excellent characteristics such as high specific strength, corrosion resistance, biocompatibility, and so on. MIM process is a suitable technique for titanium and its alloys to reduce the processing cost and material cost. In this chapter, tensile and fatigue properties of MIM compacts fabricated with Ti, Ti-6Al-4V, Ti-6Al-4V-4Cr, and Ti-6Al-7Nb are reviewed. IntroductionMetal injection molding (MIM) combines the most useful characteristics of powder metallurgy (PM) and plastic injection molding to facilitate the production of small, complex-shaped metal components with outstanding mechanical properties.Injection molding is a productive and widely used technique for shaping plastics. Alternatively, metals have advantages over polymers in mechanical properties and electrical and thermal conductivity. PM also has advantages such as easy alloying by powders and recycle ability. MIM uses the metal powder and binder plastics; thus, this is a combined process of injection molding and PM.

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“…Implants that function as bones, such as artificial joint endoprostheses, hip joints, bone plates, and tooth roots, are used under severe oscillating loading conditions and some of them are usually subjected to long-term cyclic loading [18]. It is reported that fatigue fracture is the most part of mechanical failure of titanium alloy implants [18][19][20]. Therefore, the long life fatigue properties of titanium alloys should be investigated to adjust the design.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic Surface Impact on the Fatigue Behavior of Ti-6Al-4V Subject to Simulated Body Fluid

Cao

Wang

et al. 2017

Metals

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Abstract:The effect of ultrasonic nanocrystal surface modification (UNSM) on the fatigue behavior of Ti6Al4V (TC4) in simulated body fluid (SBF) was investigated. UNSM with the condition of a static load of 25 N, vibration amplitude of 30 µm and 36,000 strikes per unit produced about 35 µm surface severe plastic deformation (SPD) layers on the TC4 specimens. One group was treated with a hybrid surface treatment (UNSM + TiN film). UNSM technique improves the micro hardness and the compressive residual stress. The surface roughness is increased slightly, but it can be remarkably improved by the TiN film. The fatigue strength of TC4 is improved by about 7.9% after UNSM. Though the current density of corrosion is increased and the pitting corrosion is accelerated, UNSM still improved the fatigue strength of TC4 after pre-soaking in SBF by 10.8%. Interior cracks initiate at the deformed carbide and oxide inclusions due to the ultrasonic impacts of UNSM. Corrosion products are always observed at the edge of fracture surface to both interior cracks and surface cracks. Coating a TiN film on the UNSMed surface helps to improve the whole properties of TC4 further.

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High cycle fatigue behaviour of Ti–6Al–4V fabricated by metal injection moulding technology

Cited by 63 publications

References 12 publications

The Influence of a Small Boron Addition on the Microstructure and Mechanical Properties of Ti‐6Al‐4V Fabricated by Metal Injection Moulding

The Influence of a Small Boron Addition on the Microstructure and Mechanical Properties of Ti‐6Al‐4V Fabricated by Metal Injection Moulding

Metal Injection Molding (MIM) Processing

Effect of Ultrasonic Surface Impact on the Fatigue Behavior of Ti-6Al-4V Subject to Simulated Body Fluid

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