Transient Scuffing of Candidate Diesel Engine Materials at Temperatures up to 600<sup>o</sup>C

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This milestone report summarizes the general characteristics of scuffing damage to solid surfaces, then describes transient effects on scuffing observed during oscillating sliding wear tests of candidate material pairs for high-temperature diesel engine applications, like waste-gate bushings in exhaust gas recirculation (EGR) systems. It is shown that oxidation and the formation of wear particle layers influence the friction of such components. In the case of metallic materials in cylindrical contacts where there is a generous clearance, debris layers can form which reduce the torque over time. For ceramic combinations, the opposite effect is observed. Here, the accumulation of wear debris ... continued below

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Blau, P. June 20, 2003.

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Description

This milestone report summarizes the general characteristics of scuffing damage to solid surfaces, then describes transient effects on scuffing observed during oscillating sliding wear tests of candidate material pairs for high-temperature diesel engine applications, like waste-gate bushings in exhaust gas recirculation (EGR) systems. It is shown that oxidation and the formation of wear particle layers influence the friction of such components. In the case of metallic materials in cylindrical contacts where there is a generous clearance, debris layers can form which reduce the torque over time. For ceramic combinations, the opposite effect is observed. Here, the accumulation of wear debris leads to an increase in the turning torque. High-temperature transient scuffing behavior is considered in terms of a series of stages in which the composition and morphology of the contact is changing. These changes are used to explain the behavior of 11 material pairs consisting of stainless steels, Ni-based alloys, Co-based alloys, and structural ceramics.

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  • Report No.: ORNL/TM-2003/142
  • Grant Number: DE-AC05-00OR22725
  • DOI: 10.2172/885740 | External Link
  • Office of Scientific & Technical Information Report Number: 885740
  • Archival Resource Key: ark:/67531/metadc892887

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Office of Scientific & Technical Information Technical Reports

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  • June 20, 2003

Added to The UNT Digital Library

  • Sept. 23, 2016, 2:42 p.m.

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  • Dec. 9, 2016, 10:29 p.m.

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Blau, P. Transient Scuffing of Candidate Diesel Engine Materials at Temperatures up to 600<sup>o</sup>C, report, June 20, 2003; [Tennessee]. (digital.library.unt.edu/ark:/67531/metadc892887/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.