Experimental and Numerical Analysis of High-Cycle Fatigue Behavior of Steel Matrix Nanocomposites Reinforced by TiC/hBN Nanoparticles

Autor: Ali Sadooghi, Amir H. Roohi, Mehdi Tajdari, Gholamhassan Payganeh
Rok vydání: 2019
Předmět:
Zdroj: Metals and Materials International. 27:802-814
ISSN: 2005-4149
1598-9623
DOI: 10.1007/s12540-019-00458-1
Popis: The majority of the product failure in industries is due to fatigue loadings. On the other hand, Nanocomposite materials are a new group of materials, which are developed because of their enhanced mechanical properties. In this manuscript, metal matrix nanocomposite samples (i.e. steel alloy 316L is considered as the matrix together with TiC and hBN nanoparticles as the reinforcing particles) are produced using the powder metallurgy process. The reinforcing nanoparticles in 3.5 wt% for each one are added to the matrix material. The samples are compacted in the pressure of 410 MPa and sintered in temperature of 1375 °C for 3.5 h. Tensile testing is carried out on the samples to find the mechanical properties of the material and to compare with the corresponding properties of the pure steel. High-cycle fatigue tests are performed to derive the Stress-Cycle curve of the nanocomposite material. Subsequently, estimation of the fatigue life of nanocomposite gear is done, using finite element numerical simulations, and then the results are compared with the AGMA standard results. Experimental and numerical results show improved mechanical properties of nanocomposite samples, compared to steel, as a result of the existence of reinforcement nanoparticles.
Databáze: OpenAIRE
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