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Fatigue-based model for the droplet impingement erosion incubation period of metallic surfaces
  • +1
  • Henk Slot,
  • Dave Matthews,
  • Dik Schipper,
  • Emile Heide
Henk Slot
TNO
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Dave Matthews
University of Twente
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Dik Schipper
University of Twente
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Emile Heide
University of Twente
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Abstract

Droplet impingement of metallic surfaces at high impact velocities results, after some time, in erosion of the surface due to fatigue. By extending our previously published analytical model to enable the use of experimental fatigue data (S-N curves), here, for the first time, a wide range of experimental liquid droplet erosion incubation period test states for both ferrous (stainless steel AISI 316) and non-ferrous (aluminium 6061-T6) engineering metals have been investigated. To achieve this, the developed model includes additional surface hardening and a residual compressive stress state at the surface due to a water drop peening effect. As such, the interrelation of the physical and mechanical properties that follows from the model has been used to identify how changes in selected metal properties might enhance droplet impingement erosion incubation life. Model predictions for both metals, using fatigue data from S-N curves from different literature sources, showed for the droplet impact velocity range of 140 to 400 m/s an excellent agreement with results from a multi-regression equation as determined from an ASTM interlaboratory test program.

Peer review status:ACCEPTED

18 Jun 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
19 Jun 2020Submission Checks Completed
19 Jun 2020Assigned to Editor
20 Jun 2020Reviewer(s) Assigned
17 Jul 2020Review(s) Completed, Editorial Evaluation Pending
18 Jul 2020Editorial Decision: Revise Major
19 Aug 20201st Revision Received
21 Aug 2020Submission Checks Completed
21 Aug 2020Assigned to Editor
21 Aug 2020Reviewer(s) Assigned
05 Sep 2020Review(s) Completed, Editorial Evaluation Pending
08 Sep 2020Editorial Decision: Accept