Mechanical behavior of damage tolerant TiB whisker-reinforced in situ titanium matrix composites

Soboyejo, W. O.; Lederich, R. J.; Sastry, Srikanth

doi:10.1016/0956-7151(94)90199-6

Cited by 118 publications

(44 citation statements)

References 10 publications

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“…Rapid solidification (RS) has been used by Fan et al [18,19] to produce melt spun ribbon and by Sastry et al [20] and Soboyejo et al [21] for the production of powder. RS of ribbon has been found to give a metastable product of supersaturated boron in a-Ti solid solution.…”

Section: Rapid Solidificationmentioning

confidence: 99%

Titanium Particulate Metal Matrix Composites - Reinforcement, Production Methods, and Mechanical Properties

Gofrey¹,

Goodwin²,

Ward‐Close³

2000

Adv. Eng. Mater.

114

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Section: Rapid Solidificationmentioning

confidence: 99%

Titanium Particulate Metal Matrix Composites - Reinforcement, Production Methods, and Mechanical Properties

Gofrey¹,

Goodwin²,

Ward‐Close³

2000

Adv. Eng. Mater.

114

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“…Compared with outside doping technique, in situ technique is very attractive for their properties such as isotropic behavior, easy to fabricate, economical and convenient to fabricate parts of complex shape. Powder metallurgy, 4,5) casting, 6,7) mechanical alloying 8) and rapid solidification 9,10) processing have been used to fabricate particle reinforced TMCs.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of <I>in situ</I> Synthesized Titanium Matrix Composites at Elevated Temperature

et al. 2003

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TiB and TiC reinforced titanium matrix composites were produced by common casting technique utilizing the self-propagation hightemperature synthesis between titanium and B 4 C. The mechanical properties and fracture mechanism of in situ synthesized titanium matrix composites have been investigated by means of uniaxial tension at elevated temperatures. As temperature increases, the ultimate tensile strength decreases and ductility increases. Compared with the matrix alloy, ultimate tensile strength of the composite was improved obviously because the in situ synthesized reinforcements are very stable at elevated temperatures and can strengthen the matrix alloy effectively. The fracture behavior was dependent on temperature. The composites fail at low strain at room temperature due to the fracture of the reinforcements. As temperature increases, voids are likely to initiate and grow at the interface between the reinforcement and the matrix alloy, and their coalescence eventually leads to the fracture of the composites. The debonding between the reinforcements and the matrix alloy becomes the main reason for the composites failure.

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“…It is necessary to fabricate model materials in order to discuss the accommodation processes, because conventional composites have the following problems: diffusionalaccommodation-controlled creep outside the measurable range, 18) the reinforcements being particles or whiskers of random orientation that have no effective load transfer, [14][15][16][17] debonding of the interface and/or breakage of whiskers, 26) and significant threshold stress covering the accommodation processes. [8][9][10][11][12][13] We selected Ti-TiB in situ composites 27,28) as the model material as they do not possess the above problems.…”

Section: Methodsmentioning

confidence: 99%

“…6,7) However, in many powder metallurgy Al matrix MMCs, [8][9][10][11][12][13] the threshold stress behavior produced by the interaction between the dislocations and the fine oxide dispersoids has been observed, and the load transfer behavior has been covered. The observation of the load transfer creep behavior has been reported only in Ti matrix MMCs [14][15][16][17] and Ag matrix MMC, 18) where the same stress exponent as that of the monolithic matrix material has been reported as the only evidence. In addition to these strengthening concepts, substructure strengthening effects of an increase in dislocation density during fabrication with reinforcements have also bee reported.…”

Section: Introductionmentioning

confidence: 99%

Volume Fraction Dependence of Plastic and Diffusional Accommodation in High-Temperature Deformation of Ti/TiB <I>In Situ</I> Composite: Appearance and Vanishing of Load Transfer Effect

2002

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The appearance and vanishing of the load transfer effect in the steady-state condition of composites' creep were analyzed via consideration of two accommodation processes, diffusion and plastic, which are inevitable for composites to continue creep deformation. Creep experiments were performed using model materials, Ti-5, 15 and 20 vol%TiB in situ composites, which have moderate diffusional-accommodationcontrolled creeps, good interfacial bonding and no fine dispersions. With higher strain rates than the diffusional-accommodation-controlled creep, the stress exponent of all composites was 4.5, similar to that of α-Ti, 4.3, and the strain rates decreased with increasing volume fraction of the reinforcements. Variations of the strain rate agreed with the prediction by the self-consistent potential method, and thus the load transfer effect was confirmed in this region. With strain rates near the diffusional-accommodation-controlled creep, the stress exponents of Ti-15 and 20 vol%TiB decreased to 2. With a strain rate lower than the diffusional-accommodation-controlled creep, the strain rates of the composites did not decrease with increasing volume fraction, and vanishing of the load transfer effect was observed.

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Mechanical behavior of damage tolerant TiB whisker-reinforced in situ titanium matrix composites

Cited by 118 publications

References 10 publications

Titanium Particulate Metal Matrix Composites - Reinforcement, Production Methods, and Mechanical Properties

Titanium Particulate Metal Matrix Composites - Reinforcement, Production Methods, and Mechanical Properties

Mechanical Properties of <I>in situ</I> Synthesized Titanium Matrix Composites at Elevated Temperature

Volume Fraction Dependence of Plastic and Diffusional Accommodation in High-Temperature Deformation of Ti/TiB <I>In Situ</I> Composite: Appearance and Vanishing of Load Transfer Effect

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