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Effect of retained austenite on adhesion-dominated wear of nanostructured carbide-free bainitic steel
Tribology International ( IF 3.517 ) Pub Date : 2020-04-07 , DOI: 10.1016/j.triboint.2020.106348
P. Valizadeh Moghaddam; J. Hardell; E. Vuorinen; B. Prakash

Sliding wear performance of carbide-free bainitic steel is significantly affected by microstructure. This investigation is an attempt to find a correlation between microstructure and wear resistance of carbide-free bainitic steel and compare the results with that of a conventional tempered martensitic microstructure. Under predominantly adhesive wear conditions, carbide-free bainitic microstructure with the highest amount of retained austenite offers the best wear resistance. This is mainly attributed to the more pronounced work hardening and TRIP-effect of carbide-free bainitic microstructure austempered at higher temperature. Therefore, higher initial bulk hardness is not the only indicator of wear resistance. Moreover, when both oxidation and adhesion are active, a microstructure with an optimum content of retained austenite and bainitic ferrite shows the highest wear resistance.
更新日期:2020-04-07

 

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