Effect of heat treatment on the white layer and its effect on the damping behavior of metal matrix composites

Dora, Siva Prasad; Shoba, Ch.

doi:10.1016/j.msea.2014.01.072

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…Thermo-elastic coupling is the linear expansion of the length of a material which can be achieved either by stretching it or by heating it. In the thermoelastic damping mechanism, the vibration energy is dissipated to the surroundings through irreversible heat which leads to stress-induced thermal gradient in the damping specimens [11]. The thermo-elastic coupling effect may become evident when a material undergoes a heterogeneous deformation such as beam bending in the Dynamic Mechanical Analyser equipment as reported in the literature [12].…”

Section: Aluminium Cumentioning

confidence: 99%

Damping properties of nickel-added modified zinc alloys

Male¹,

Annamalai²

2017

J. MECH. ENG. SCI.

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The objective of the present work is to investigate the effect of Ni content on the damping behaviour of zinc modified alloy using a dynamic mechanical analyser. The modified zinc alloys were prepared for different additions of Ni content using the liquid metallurgical technique. Damping properties such as storage modulus, loss modulus and specific damping capacity were studied for both zinc alloy and modified zinc alloy over a temperature range of 30 C to 300 C. The results showed that the specific damping capacity and loss modulus of both zinc and modified zinc alloys increased with increases in temperature, but storage modulus decreased with temperature. The addition of Ni into zinc alloys improves its specific damping capacity due to the thermal expansion mismatch which induced a dislocation density between the matrix and alloy. The specific damping capacity was found to be high at higher temperature (300 o C) due to the intrinsic damping of zinc alloy and thermo-elastic damping between the zinc alloy and Ni particulate. In the present work, it was also found that the contribution of thermoelastic damping is significant throughout the temperature range considered.

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Section: Aluminium Cumentioning

confidence: 99%

Damping properties of nickel-added modified zinc alloys

Male¹,

Annamalai²

2017

J. MECH. ENG. SCI.

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“…Part of this melt is removed by the dielectric fluid and the remaining part re-solidifies rapidly on the surface of the specimens which results in the formation of white layer. This white layer has a significant effect on the damping behaviour [7,8]. As, damping is the material's ability to dissipate elastic strain energy in the form of heat during cyclic loading to its surroundings, the white layer thus formed on the surface will act as a protective layer to dissipate energy to the surroundings resulting lower damping capacities.…”

Section: A N U S C R I P Tmentioning

confidence: 99%