Friction and Wear Characteristics of SUS304 and SUS630 after Ultrasonic Nanocrystal Surface Modification

Abstract

Owing to the superior properties of stainless steel it is pertinent to make use of it in various applications of automotive, aerospace, nuclear, chemical and cryogenic products. This paper describes a study of friction characteristics of SUS304 and SUS630 stainless steel disk specimens against silicon nitride Si3N4 ball in dry, grease-, and oil-lubricated conditions and wear characteristics in dry condition in sliding contact. The ultrasonic nanocrystal surface modification (UNSM) technology was applied to those disk specimens and its friction and wear properties were compared with polished one. The experiment was conducted with a pin-on-disk tribo tester using ball-on-disk contact geometry at room temperature. The experiment results show that in dry, greased- and oil-lubrication conditions the coefficient of friction of UNSM-treated specimens was lower and constant than polished specimens and in dry condition the wear rate was also smaller than polished one. Micro dimples made by UNSM treatment contribute those effects.

Effect of ultrasonic nanocrystal surface modification on residual stress and fatigue cracking in engineering alloys

“…The residual stress measurements were carried out with X‐ray diffraction and hole drilling methods. The details of the measurements are reported elsewhere . The residual stress measurement techniques use different areas to average the residual stress over that region.…”

“…The details of the measurements are reported elsewhere. [18][19][20][21] The residual stress measurement techniques use different areas to average the residual stress over that region. The minimum mesh size in the FE simulations was kept as 30 to 60 μm, which was different than the area used for averaging experimental stress measurements.…”

A Review of Low‐Plasticity Burnishing and Its Applications

“…Finally, Teimouri et al [ 140 ] developed an analytical model to predict the post‐UABB residual stress distribution and the depth of the plastically deformed layer. To validate the model, they carried out experiments on 6061‐T6 aluminum alloy and AISI 1045 steel and further used this model to verify the results of AISI 304 stainless steel, [ 141 ] Ti–6Al–4 V alloy, [ 142 ] and Inconel 718 alloy. [ 143 ] All these five materials showed consistency between the predicted and experimental results.…”