EFFECT OF FRCTION STIR PROCESSING ON THE TRIBOLOGICALPERFORMANCE OF STEEL/TiCNANO-COMPOSITE
سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 367
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شناسه ملی سند علمی:
UFGNSM03_265
تاریخ نمایه سازی: 10 تیر 1396
چکیده مقاله:
In this study, the almost new processing technique, friction stir processing (FSP) was employed to produce nano-composite surface layers on mild steel. Nano-sized TiC particulates were introduced to the stir Zone by means of a pre-made groove. A tungsten carbide tool was used to plasticize the mild steel substrate. The process transformed the original pearlite microstructure to acicular-type ferrite, resulting in significant increase in surface hardness. This surface hardening produced a significant benefit for fiction and wear behavior of the steel as measured by unidirectional sliding pin-on-disk testing. Under sliding, FSP reduced friction coefficient and wear rate and increase wear properties about four times more than that of the as-received mild steel. The surface nano-composite layer produced by four FSP passes showed superior wear resistance; this is attributed to its greater micro hardness value (due to presence of finer matrix grains and uniform dispersion nano-sized TiC particles).
کلیدواژه ها:
نویسندگان
A. GHLASEMI KAHRIZSANG
School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran, Tehran, Iran
S. F. KASHANT-BOZORG
School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran, Tehran, Iran, Tel: +۹۸۲۱۸۲۰۸۴۱۰۵ fax:+۹۸-۲۱-۸۸۰۰۶۰۷۶