Evolution of microstructure and phases in<i>in situ</i>processed Ti–TiB composites containing high volume fractions of TiB whiskers

Sahay, Satyam S.; Ravichandran, K.; Atri, Revti; Chen, B.; Rubin, Jacob

doi:10.1557/jmr.1999.0571

Cited by 131 publications

(82 citation statements)

References 12 publications

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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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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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“…4, а-д). Следу-ет отметить, что характерным для TiB являет-ся ускоренный рост в осевом направлении 010 и медленный рост в поперечном направлении [36][37][38]. Длина кристаллов борида титана со-ставляет 120…400 мкм, а диаметр 5…30 мкм.…”

Section: результаты и обсуждениеunclassified

Structure and properties of TiB-TiC-Ti layers fabricated on cp-titanium substrates by electron beam cladding

Lenivtseva¹,

Drobyaz²,

Gontarenko³

et al. 2016

Metal Working and Material Science

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“…The TiB constituent, on the other hand, is not well understood and the limited available literature shows a wide range of estimated properties [Sahay et al 1999;Panda and Ravichandran 2003;Ravichandran et al 2004]. These properties with uncertain values are variables over which to optimize.…”

Section: B Mathematical Model For Plate Deflectionmentioning

confidence: 99%

“…the range of values it can assume, based on data from [Sahay et al 1999;Panda and Ravichandran 2003;Ravichandran et al 2004;Panda and Ravichandran 2006;Hill and Lin 2002]. The fourth design variable, the tup impact velocity, is also assumed to be limited to certain magnitudes based on the settings for the impact tests.…”

Section: B Mathematical Model For Plate Deflectionmentioning

confidence: 99%

Property estimation in FGM plates subject to low-velocity impact loading

Larson¹,

Palazotto²

2009

J. Mech. Solids Struct.

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A property estimation sequence is presented for determining local elastic properties of a two-phased, twoconstituent functionally graded material (FGM) plate subject to impact loading. The property estimation sequence combines the use of experimentally determined strain histories, finite element simulations of the experimental impact events, and an analytical model of the impact tests. The experimental, computational, and analytical models are incorporated into a parameter estimation framework, based on optimization theory, to solve for material properties of individual graded layers in the FGM plate specimens. The property estimation sequence was demonstrated using impact tests performed on a titanium-titanium boride (Ti-TiB) FGM plate system. The estimated material properties of the Ti-TiB FGM from the sequence were shown to correlate well with published material properties for the titaniumtitanium boride FGM system. The estimated properties were further input into a finite element model of the impact events and were shown to approximate the experimental strain histories well. This property estimation framework is formulated to apply to virtually any two-phase FGM system and is thus an invaluable tool for research engineers studying the response of FGMs under load.

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Evolution of microstructure and phases inin situprocessed Ti–TiB composites containing high volume fractions of TiB whiskers

Abstract: Jo u rn al of m a t e r i a l s r e s e a r c h W e lc o m e C o m m e n t s H e lp

Cited by 131 publications

References 12 publications

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

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

Structure and properties of TiB-TiC-Ti layers fabricated on cp-titanium substrates by electron beam cladding

Property estimation in FGM plates subject to low-velocity impact loading

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