Powder metallurgy Ti-6Al-4V-xB alloys: Processing, microstructure, and properties

Tamirisakandala, Seshacharyulu; Bhat, R.B.; Ravi, Vilupanur A.; Miracle, D.B.

doi:10.1007/s11837-004-0131-5

Cited by 26 publications

(18 citation statements)

References 4 publications

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“…4(d)] was indexed during the EBSD experiments and no TiB 2 was observed in the Ti-6Al-4V-0.5B alloy. This is in agreement with thermodynamic expectations [17,[21][22][23][24] and with the Feng et al [20] statement.…”

Section: Microstructure Morphologysupporting

confidence: 93%

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: Microstructure Morphologysupporting

confidence: 93%

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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“…3,4 These advances have signifi cant implications for the development of next-generation high-performance TMC materials. The higher strength and stiffness of these alloys is expected to improve transverse properties and, therefore, reduce anisotropy in TMCs.…”

Section: Titanium Composite Materials and Processesmentioning

confidence: 99%

“…Further, P/M processing produces a small number of large primary TiB particles that limit tensile elongation. 4 For the best balance of mechanical properties, these need to be eliminated.…”

Section: Merging Technologies: the Challengementioning

confidence: 99%

The prospects for hybrid fiber-reinforced Ti-TiB-matrix composites

Hanusiak¹,

Fields²,

Hammond³

et al. 2004

JOM

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Signifi cant cost reductions in continuously reinforced titanium-matrix composites have enabled their successful insertion into two aerospace applications. Additional applications are being pursued, but reduced anisotropy is required to achieve the broadest impact of this technology. Novel hybrid composites consisting of continuous SiC reinforcements and titanium alloys enhanced with TiB and/or TiC particles are being developed to reduce the anisotropy between longitudinal and transverse properties.

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“…On the other hand, Ti-6Al-4V alloy has poor workability and the fabrication cost of complex components by machining is significantly high [1][2][3][4][5][6] . Therefore, metal injection molding (MIM) process is hoped to reduce the productive cost of such complex parts.…”

Section: Introductionmentioning

confidence: 99%

“…reported that the addition of a small quantity of boron to this alloy has resulted refining the grain size of the lamellar microstructure [5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Minor Boron Addition on the Fatigue Strength and High Temperature Properties of Injection Molded Ti-6Al-4V Compacts

Choe

Osada

Kudo

et al. 2016

J. Jpn. Soc. Powder Powder Metallurgy

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Ti-6Al-4V alloy has attracted a lot of attention from the automotive and aerospace industries because of their outstanding specific strength and corrosion resistance. On the other hand, Ti-6Al-4V alloy has normally poor workability because of the low thermal conductivity and the low elastic modulus. Metal injection molding (MIM) process is expected to manufacture a complex part with near net shape and reduce the manufacturing cost. However, Ti-6Al-4V alloy compacts by MIM process had a problem of low fatigue strength compared to wrought material.In this study, we tried to add a minor amount of boron using TiB 2 powder for improving the fatigue strength. Addition of boron resulted refinement of the grain size of lamellar structure, which lead to increase the high cycle fatigue strength and fatigue limit. In addition, tensile properties at high temperature was investigated. KEY WORDSmetal injection molding, Ti-6Al-4V, fatigue strength, high temperature strength, titanium boride

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Powder metallurgy Ti-6Al-4V-xB alloys: Processing, microstructure, and properties

Cited by 26 publications

References 4 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

The prospects for hybrid fiber-reinforced Ti-TiB-matrix composites

Effect of Minor Boron Addition on the Fatigue Strength and High Temperature Properties of Injection Molded Ti-6Al-4V Compacts

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