Investigation of Wear Anisotropy in a Severely Deformed Al-Al3Ti Composite

El‐Hadad, Shimaa; Sato, Hisashi; Watanabe, Yoshihiko

doi:10.1007/s11661-012-1127-3

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…And for HCP crystal like sapphire, wear rate on basal plane along [ 20] was lower than [10 0] 5 . After these pioneering works on anisotropic friction and wear properties, more efforts have been made in exploring directionality of tribological properties for various kind of materials 8 – 17 . As wurtzite single crystal material, the anisotropic properties of GaN also have been studied for decades, such as Young’s modulus, hardness, shear strength, etc 18 – 21 .…”

Section: Introductionmentioning

confidence: 99%

Crystal Orientation Dependence of Gallium Nitride Wear

Zeng¹,

Sun²,

Song³

et al. 2017

Sci Rep

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We explore how crystallographic order and orientation affect the tribological (friction and wear) performance of gallium nitride (GaN), through experiments and theory. Friction and wear were measured in every direction on the c-plane of GaN through rotary wear experiment. This revealed a strong crystallographic orientation dependence of the sliding properties of GaN; a 60° periodicity of wear rate and friction coefficient was observed. The origin of this periodicity is rooted in the symmetry presented in wurtzite hexagonal lattice structure of III-nitrides. The lowest wear rate was found as 0.6 × 10−7 mm3/Nm with <100>, while the wear rate associated with <110> had the highest wear rate of 1.4 × 10−7 mm3/Nm. On the contrary, higher friction coefficient can be observed along <100> while lower friction coefficient always appeared along <110>. We developed a simple molecular statics approach to understand energy barriers associated with sliding and material removal; this calculated change of free energy associated with sliding revealed that there were smaller energy barriers sliding along <110> as compared to the <100> direction.

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Section: Introductionmentioning

confidence: 99%

Crystal Orientation Dependence of Gallium Nitride Wear

Zeng¹,

Sun²,

Song³

et al. 2017

Sci Rep

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“…2 Therefore, aluminum matrix composites (AMCs) are interesting in automotive, aerospace and transport industries because of their light weight, high elastic modulus, improved strength and good wear resistance. [2][3][4][5] AMCs reinforced by intermetallic particles have been extensively investigated [6][7][8][9] as a result of strong bonding to matrix, 7,10 their low density, 11 high hardness, 7,11,12 high melting temperature, 7,12 high resistance to wear [11][12][13][14] and their closer thermal expansion coefficient to the aluminum matrix. 7,9,12,15 This smaller difference in thermal expansion coefficients lowers the residual stresses at the reinforcements/ matrix interfaces when the composite is exposed to thermal cycle and, hence, guarantees a lower degree of failure.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4][5] AMCs reinforced by intermetallic particles have been extensively investigated [6][7][8][9] as a result of strong bonding to matrix, 7,10 their low density, 11 high hardness, 7,11,12 high melting temperature, 7,12 high resistance to wear [11][12][13][14] and their closer thermal expansion coefficient to the aluminum matrix. 7,9,12,15 This smaller difference in thermal expansion coefficients lowers the residual stresses at the reinforcements/ matrix interfaces when the composite is exposed to thermal cycle and, hence, guarantees a lower degree of failure. 7,11,12 Al-Ti intermetallics are excellent candidates as reinforcements in AMCs where they provide low density, high resistance to corrosion and oxidation, high strength and elastic modulus at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…7,9,12,15 This smaller difference in thermal expansion coefficients lowers the residual stresses at the reinforcements/ matrix interfaces when the composite is exposed to thermal cycle and, hence, guarantees a lower degree of failure. 7,11,12 Al-Ti intermetallics are excellent candidates as reinforcements in AMCs where they provide low density, high resistance to corrosion and oxidation, high strength and elastic modulus at high temperatures. 15 Among different Al-Ti-based aluminides, tetragonal Al 3 Ti intermetallic has the lowest density, due to its higher aluminum content, and consists of the highest hardness.…”

Section: Introductionmentioning

confidence: 99%

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Dry friction and wear behavior of in-situ Al/Al3Ti composite

Habibolahzadeh

Hassani

Bagherpour

et al. 2013

Journal of Composite Materials

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Effects of different volume fractions of reinforcement and various loads applied in wear testing on dry tribological behavior of Al-Al 3 Ti in-situ composite were investigated. Mixture of aluminum and different amount of titanium powders has been compacted and combustion synthesized to obtain Al-Al 3 Ti composite with different percent of reinforcements. The results of pin-on-disk wear tests indicated that addition of Al 3 Ti to aluminum matrix increase wear resistance of the composite samples by 4 times compared to that of pure aluminum. In addition, presence of Al 3 Ti reinforcement reduced friction coefficient of the composites. Oxidation/abrasive mechanism was revealed to be dominant on wear behavior of Al-Al 3 Ti composites; adhesive wear decreased as volume fraction of the intermetallic increased in the composites.

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