Cyclic hardening/softening experimental data in nano-clay-composite and aluminum alloy under high-temperature strain-controlled loading

Abstract

This article presents cyclic hardening/softening behaviors (experimental data) of the heat-treated aluminummatrix nano-clay-composite (AlSi_N_HT6), compared to those of the piston aluminum alloy (AlSi) under straincontrolled loading. For such an objective, standard samples were fabricated by gravity and stir-casting methods. Low-cycle fatigue experiments were carried out under different strain amplitudes (0.20% to 0.45%) and at various temperatures (25 ℃ to 300 ℃). Obtained results implied that no obvious change was observed on material properties of aluminum alloy by reinforcements, but a decrement was observed due to increasing the temperature. Results also indicated that the increase of the temperature from 25 ℃ to 200 ℃ has changed the cyclic behavior of both materials (AlSi_N_HT6 and AlSi) from hardening to softening. Moreover, the temperature effect was more significant than the total strain amplitude influences in cyclic behaviors.

Impacts of nano-clay particles and heat-treating on out-of-phase thermo-mechanical fatigue characteristics in piston aluminum-silicon alloys

“…omponents with high-temperature service conditions, such as cylinder heads and pistons, are subjected to heating and cooling transients during start and stop operations [1]. Repetition of these conditions led to thermal fatigue due to constrained thermal strains.…”