Microstructure and tensile properties of mechanically alloyed Ti–6A1–4V with boron additions

Godfrey, T.M.T.; Wisbey, A.; Goodwin, P.S.; Bagnall, KE; Ward‐Close, C.M.

doi:10.1016/s0921-5093(99)00699-1

Cited by 117 publications

(48 citation statements)

References 4 publications

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“…Moreover, comparing with the pure titanium foam (Figure 10), the titanium-matrix foams show higher compressive strength due to the higher strength of SiC particles and more relative density of the foams. Similar results on the mechanical properties of titanium foams reinforced by different ceramic particles have been reported in the literature [2,9,16,21]. Table 1 lists compressive strength, energy absorption and other properties of titanium-matrix foams.…”

Section: Compressive Properties and Energy Absorption Of Produced Foamssupporting

confidence: 82%

“…Ceramic reinforcement particles have been used in the studies of Choe et al [10] who worked on TiC, Lee et al [11] on TiN, Yoshida et al [12] on TiO 2 , Karbalaei Akbari et al [13] on TiB 2 , Liang et al [14] on Si 3 N 4 , and Poletti et al [9] on SiC. Eriksson et al [15] produced Ti-TiB 2 composites by spark plasma sintering and Godfrey et al [16] investigated microstructure and tensile properties of mechanically alloyed Ti-6A1-4V with boron oxide additions. Oxide reinforcement particles such as Al 3 O 2 and R 2 O 3 (with R = rare element) have been used by Liu et al [17] and Hieda et al [18], respectively.…”

Section: Introductionmentioning

confidence: 99%

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Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy

Edalati

Sajjadi

Babakhani

2017

Metals

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Metal-matrix foams are used widely for structural applications such as impact energy absorption, vibration resistance and weight reduction. In this study titanium nanocomposite foams with different porosity percentages were produced using TiH 2 , as foaming agent, by powder metallurgy technique. At first, raw materials including titanium powder and different weight percentages of SiC nanoparticles were mixed and then different amounts of TiH 2 were added to the mixture. The mixture was compacted at 200 MPa. The samples were heat treated in two stages, first at 400 • C for 1 h, as a partial sintering, and then at 1050 • C for 2 h, as foaming treatment. Mechanical and structural properties such as compressive strength, energy absorption, porosity percentage and relative density of samples were measured and compared together. Thermo gravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and X-ray diffraction (XRD) were performed on foaming agent and samples. The results showed uniform distribution of SiC nanoparticles in titanium matrix and also homogenous pore structure. It was concluded that with increasing SiC weight percent, relative density is increased to 0.43 in the sample with 1.5 wt % SiC. Besides, the measured compressive strength of samples was in the range of 14.4-32.3 MPa. Moreover, it was concluded that the energy absorption of samples increases with increasing SiC nano particles up to 33.09 MJ/m 3 .

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Section: Compressive Properties and Energy Absorption Of Produced Foamssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy

Edalati

Sajjadi

Babakhani

2017

Metals

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“…Of these stable ceramics, the main representative is titanium carbide (we use TiC in the following, but TiC 1(x would be more accurate, given the large stoichiometric range [1,2]): TiC has been used in titanium and titanium alloys as particulate reinforcement [2 Á/8] or formed in-situ during reaction with carbon [9], often as coating on SiC fibers [10]. TiB is another main phase thermodynamically stable with titanium, and can be formed in-situ following hightemperature dissolution of TiB 2 [7,8,11] or other Bcontaining materials [12]. Among metals, vanadium, molybdenum and tungsten stand out as potential reinforcements in titanium, because of their low solubility in a-Ti (3 wt.% for V and 0.8 wt.% for Mo and W) and the lack of any intermetallic compounds with titanium [1].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of Ti/W and Ti–6Al–4V/W composites fabricated by powder-metallurgy

Frary

Abkowitz²,

Dunand

2003

Materials Science and Engineering: A

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Tungsten-reinforced Ti and Ti Á/6Al Á/4V composites were fabricated by powder metallurgical techniques from Ti, W and Al Á/V powders. The microstructure of the composites consists of partially dissolved tungsten particles within an a/b titanium matrix containing tungsten in solid-solution. Yield and ultimate tensile strengths increase linearly with tungsten content in the range 0 Á/15 wt.% W and decrease near-linearly with temperature in the range 25 Á/540 8C. Ductility follows the opposite trend and is within technologically acceptable values, except for Ti/15W at 315 and 425 8C and Ti/10W at 540 8C which fractured near the ultimate stress value. The Ti Á/6Al Á/4V/10W composite shows the best combination of high strength and ductility at all temperatures. At ambient temperatures, Ti/10W exhibits a stress Á/strain curve very similar to Ti Á/6Al Á/4V (with a slight decrease in stiffness), while eliminating aluminum and vanadium alloy elements. Further improvements in mechanical properties of these non-equilibrium composites are likely to be achieved through optimized heat-treatments, which affect the matrix microstructure and the degree of dissolution of tungsten and thus the relative importance of matrix solid-solution strengthening and composite strengthening. # 2002 Published by Elsevier Science B.V.

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“…24) For preparing the TiB/Ti6Al4V composite, spherical Ti6Al4V powder with an average particle size of 11 µm, irregular Ti powder with an average particle size of 39 µm and TiB 2 powder with an average particle size of 3.8 µm were used. The particle sizes of these powders are uneven in order to stack densely and gain high density during SPS process.…”

Section: Starting Powdersmentioning

confidence: 99%

<i>In Situ</i> Synthesis of TiB/Ti6Al4V Composites Reinforced with Nano TiB through SPS

Cao

Zeng²,

Lu³

et al. 2015

Mater. Trans.

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Titanium matrix composites reinforced with TiB whiskers were in situ synthesized by spark plasma sintering (SPS) at a temperature range of 11731473 K, using a mixture of 6.2 mass% TiB 2 , 4.1 mass% Ti, and 89.7 mass% Ti6Al4V powders. The in-situ synthesis mechanism and the effect of sintering temperature on the sintering microstructure were investigated. The results show that an increase of the sintering temperature causes the relative densities of the composites to increase and the reaction between Ti and TiB 2 to be more complete. Nano-sized TiB reinforcements with a diameter of around 80 nm and fine-grained matrix with an average grain size of 12 µm are obtained after SPSed at 1373 K. Clean and perfect TiB/matrix interfaces without debonding or cracks are obtained during SPS process. Low sintering temperature and short sintering time are believed to be the main reasons for the improved fine-grained microstructure.

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Microstructure and tensile properties of mechanically alloyed Ti–6A1–4V with boron additions

Cited by 117 publications

References 4 publications

Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy

Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy

Microstructure and mechanical properties of Ti/W and Ti–6Al–4V/W composites fabricated by powder-metallurgy

<i>In Situ</i> Synthesis of TiB/Ti6Al4V Composites Reinforced with Nano TiB through SPS

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