Adhesion between ferrite iron-iron/cementite countersurfaces: A molecular dynamics study

AT AlMotasem and J Bergstrom and A Gaard and P Krakhmalev and LJ Holleboom, TRIBOLOGY INTERNATIONAL, 103, 113-120 (2016).

DOI: 10.1016/j.triboint.2016.06.027

The adhesive properties of Fe(110)/Fe(110) and Fe3C(001)/Fe(110) countersurfaces have been investigated by using classical molecular dynamics simulations. The simulation results show that Fe3C/Fe exhibits a relatively lower adhesion compared to the Fe/Fe. Additionally, the temperature dependence of the adhesive properties between 300-700 K has been examined. The results demonstrate that, with increasing the temperature, the values of the adhesion force and the work of adhesion continuously decrease in the case of Fe3C/Fe; they initially slightly increase up to 500 K then decrease in the case of Fe/Fe. Furthermore, the effect of lattice coherency between Fe/Fe has been examined and found to slightly reduce the adhesion. These results explain how carbides improve galling resistance of tool steel observed during dry sliding. (C) 2016 Elsevier Ltd. All rights reserved.

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