The effect of frequency on both the debris and the development of the tribologically transformed structure during fretting wear of a high strength steel

Abstract

Confirmation of AuthorshipPlease save a copy of this MS Word file, complete and upload as the "Confirmation of Authorship" file.As corresponding author, I Adam Kirk, hereby confirm on behalf of all authors that:1) The authors have obtained the necessary authority for publication.2) The paper has not been published previously, that it is not under consideration for publication elsewhere, and that if accepted it will not be published elsewhere in the same form, in English or in any other language, without the written consent of the publisher.3) The paper does not contain material which has been published previously, by the current authors or by others, of which the source is not explicitly cited in the paper.Upon acceptance of an article by the journal, the author(s) will be asked to transfer the copyright of the article to the publisher. This transfer will ensure the widest possible dissemination of information. Confirmation of Authorship Ms. Ref. No.: WOM2019-D-18-00084Title: The effect of frequency on both the debris and the development of the tribologically transformed structure during fretting wear of a high strength steel Wear of Materials 2019Response to reviewer's comments We are grateful to the reviewer and editor for the input on this paper, and for giving us the opportunity to revise it. We have responded to the comments point-by-point (as outlined below), but in addition, would like to summarise the most significant change here.We acknowledge that the relationships between physical processes were not expressed as clearly as necessary in the discussion section which led to comments 4 and 5 from the reviewer. In response to these comments, we have developed an interaction diagram to illustrate the complexity of the relationships between the test parameters, their effect on the physical processes, and thus the outcomes in terms of material damage mechanisms. This new diagram has been included in Section 4, page 16.The original text from the reviewer is in standard font, whilst our responses are in italics. Revisions to the manuscript are highlighted. Reviewer commentsThis paper is interesting. However, there are some points requiring further explanation. Thus, it is necessary to revise the original manuscript accordingly to improve the quality for the journal before being finally accepted.1) The oxide debris bed, TTS, defomed layer should be clearly indicated in Figs. 9-12. Furthermore, where the crack run should be indicated in these figures. Response:The distinct regions have been marked on Fig. 9 (the low magnification view) given that it includes the whole areas shown in and that this approach minimises the obscuration of features of note shown at higher magnifications."The third body layer (TBL) and TTS layers have been marked for clarity" (Section 3.4, page 7).2) Were any repeat tests done for each condition? If repeat tests were carried out, please add this to the descriptions and results. The error bar should be used to clarify the difference in the data. Response:We have conducted repeat tests,...

Modelling adhesive wear extension in fretting interfaces: An advection-dispersion-reaction contact oxygenation approach

“…This very nice correlation involving a wide range of experiments confirms the stability of the model and comes in agreement with the contact oxygenation concept (COC) which suggests that the higher the Archard power density dissipated in the contact, the faster the consumption of di-oxygen molecules and consequently the smaller the oxygen distance. Similar tendency was observed in previous studies on titanium [9,10] and steel alloys [58]. The given results are established for the studied steel interface.…”

Debris development in fretting contacts – Debris particles and debris beds

“…Fretting is defined as small amplitude relative oscillatory motion between two contacting bodies that gives rise to both wear and fatigue in a wide range of industrial contexts, the understanding and mitigation of which have been the subject of extensive study. It is well known that fretting conditions can result in substantial subsurface damage [1,2], and in contrast to sliding wear, the small relative displacements that characterise fretting have a significant impact on the development of wear through the behaviour of wear debris in the contact itself; specifically, a proportion of wear debris is entrapped in the contact and thus modifies the nature of the contact, whilst the remaining debris is ejected from the contact and thus ceases to play a direct role in the subsequent wear process [3].…”

Torsional fretting wear experimental analysis of a R3 offshore steel against a PC/ABS blend

“…Another factor that seems to have a great influence in fretting wear mechanisms is the frequency. Kirk et al [29] conducted fretting wear experiments using high strength steels in the cylinder-on-flat configuration across a range of frequencies. They observed that, for higher frequencies, the wear damage was lower than for lower ones.…”