Corrosion Effects on High‐cycle Fatigue Lifetime and Fracture Behavior for Heat‐treated Aluminum‐matrix Nano‐clay‐composite Compared to Piston Aluminum Alloy

Abstract

In this research, the corrosion effect has been investigated on the high-cycle fatigue lifetime and the fracture behavior for the heat-treated aluminum-matrix nano-clay-composite and piston aluminum alloys. For this objective, after fabricating stir-casted nano-clay-composite, standard samples were machined and rotary bending fatigue tests were performed. To study the corrosion effect, some specimens were corroded in in the 0.00235% H 2 SO 4 solution after 200 hours and then, they were tested under cyclic bending loading. Due to increase in the hardness by adding nano-clay particles and the heat treatment, higher fatigue strength occurred, compared to the base material. Nano-clay particles shortened the fatigue lifetime; however, this effect was less in the corrosion-fatigue lifetime. Moreover, the failure mechanism was the brittle fracture behavior due to the observation of quasi-cleavage and cleavage marks.

Bending cyclic behavior and scatter-band analysis of aluminum alloys under beneficial and detrimental conditions through high-cycle fatigue regime

“…Under high-stress levels and through the low-cycle fatigue regime, the corrosion-fatigue lifetime of aluminum-silicon alloys (reinforced with nanoparticles and the heat treatment) increased, compared to that of aluminum-silicon alloys, as also claimed by Rezanezhad et al [10]. Considering obtained results for fatigue and corrosion-fatigue testing for comparison, the corrosion-fatigue lifetime was less than the fatigue lifetime in all cased, as also reported by Guerin et al [4], Chen et al [5], Rodriguez et al [6], and Azadi et al [1]. The main objective of this article was the sensitivity analysis of inputs on outputs.…”

“…These bending stress levels were 120, 150, 180, and 210 MPa. More details for the fabrication of the studied materials could be found in the literature by Aroo et al [1], Azadi et al [3], Rezanezhad et al [10], and Zolfaghari et al [11]. In addition, more details of fatigue testing and the geometry of standard cylindrical samples could be followed in the literature by Parast et al [12], Sharifi et al [13], and Khisheh et al [14].…”

“…One case study is the cylinder head in a diesel engine, which is arrested by the corrosive fuel environment besides cyclic mechanical loadings. Therefore, knowing the corrosion-fatigue behavior of the material could be useful for designer engineers [1][2]. Moreover, the improvement in the corrosion-fatigue lifetime of components is to be noticed in the automotive industry.…”