Title of article :
Beneficial effects of yttrium on mechanical properties and high-temperature wear behavior of surface aluminized 1045 steel
Author/Authors :
Hojat Ahmadi، نويسنده , , D.Y Li، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2003
Pages :
10
From page :
933
To page :
942
Abstract :
It has been demonstrated that oxygen-active elements (OAE) such as yttrium and cerium are beneficial to the wear resistance of aluminized layers or surfaces in corrosive environments. In this research, effects of yttrium on the wear behavior of Y-containing and Y-free aluminized surfaces of 1045 steel at elevated temperatures were investigated using a high-temperature pin-on-disc tribometer. Composition and structure of the aluminized layers were analyzed using the energy-dispersive spectroscopy (EDS) and X-ray diffraction technique (XRD), respectively. Mechanical properties of the aluminized surface layers were investigated using a micro-mechanical probe. In order to better understand the wear behavior of the aluminized surfaces at elevated temperatures, mechanical properties and scratch resistance of oxide films on the aluminized surfaces formed at 600 °C were investigated using nano-indentation and micro-scratch techniques. Structure of the oxide films was also determined using the grazing incidence XRD technique. It was demonstrated that the oxide film on the Y-containing aluminized surface contained Y2O3 phase that could be the main factor to render the oxide film harder, more elastic, and more resistant to scratch failure than that on the Y-free aluminized surface. All the results demonstrated that yttrium significantly improved the aluminized surface and its oxide film, resulting in enhanced resistance to wear at both elevated and room temperatures.
Keywords :
Aluminizing , High-temperature wear , Oxide film , failure , Yttrium
Journal title :
Wear
Serial Year :
2003
Journal title :
Wear
Record number :
1086071
Link To Document :
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