Surface topography evolution during long-run micro-stamping of bipolar plates (BPPs) and effects on corrosion and contact resistance characteristics

M. F. Peker, Ö N. Cora, Muammer Koç

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Micro-stamping, as a promising sheet metal forming process for mass production of small parts, can meet the expectations such as durability, strength, surface finish, and low cost for miniaturized metal products and features. The purpose of this research was set to investigate surface interactions during mass manufacturing of micro-stamped sheets, and its consequences; then establish correlations (if any) between surface interactions vs. corrosion and contact resistance of bipolar plates (BPPs) to be used in proton exchange membrane fuel cells (PEMFC). In experimental part of this study, 10,000 SS316L sheet blanks were micro-stamped using a stamping die set with 750 μm-deep micro-channels under 200 kN stamping force, and with a constant stamping speed of 1mm/s. Surface inspections (surface roughness and micro-channel height measurements), corrosion and contact resistance tests were carried out on BPPs. Analysis of variance (ANOVA) technique was utilized to investigate the significance of surface roughness, channel heights, corrosion and contact resistance variations for BPPs. Moreover, three-dimensional (3D) finite element models of micro-stamping process were established to approximate the stress and strain levels as well as coefficient of friction value experienced at contact interface. The results revealed that the roughness values for microstamping dies and BPPs followed similar trends during 10,000 micro-stampings. Since surface defects trigger corrosion, the correlation between surface roughness and corrosion resistance of BPPs was found to be direct. Increasing number of surface irregularities (asperities) lowered contact surface area that resulted in increased contact resistance. Finally, comparison of experimental and numerical channel height values showed that the coefficient of friction did not change considerably during the mass production of BPPs, at least within the 10,000 stamping cycle.

Original languageEnglish
Title of host publicationASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012
Pages3035-3039
Number of pages5
Volume7
EditionPARTS A, B, C, D
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012 - Houston, TX, United States
Duration: 9 Nov 201215 Nov 2012

Other

OtherASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012
CountryUnited States
CityHouston, TX
Period9/11/1215/11/12

Fingerprint

Stamping
Surface topography
Contact resistance
Corrosion resistance
Surface roughness
Friction
Metal forming
Surface defects
Proton exchange membrane fuel cells (PEMFC)
Sheet metal
Analysis of variance (ANOVA)
Durability
Inspection
Corrosion
Metals
Costs

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Peker, M. F., Cora, Ö. N., & Koç, M. (2012). Surface topography evolution during long-run micro-stamping of bipolar plates (BPPs) and effects on corrosion and contact resistance characteristics. In ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012 (PARTS A, B, C, D ed., Vol. 7, pp. 3035-3039) https://doi.org/10.1115/IMECE2012-85461

Surface topography evolution during long-run micro-stamping of bipolar plates (BPPs) and effects on corrosion and contact resistance characteristics. / Peker, M. F.; Cora, Ö N.; Koç, Muammer.

ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012. Vol. 7 PARTS A, B, C, D. ed. 2012. p. 3035-3039.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Peker, MF, Cora, ÖN & Koç, M 2012, Surface topography evolution during long-run micro-stamping of bipolar plates (BPPs) and effects on corrosion and contact resistance characteristics. in ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012. PARTS A, B, C, D edn, vol. 7, pp. 3035-3039, ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012, Houston, TX, United States, 9/11/12. https://doi.org/10.1115/IMECE2012-85461
Peker MF, Cora ÖN, Koç M. Surface topography evolution during long-run micro-stamping of bipolar plates (BPPs) and effects on corrosion and contact resistance characteristics. In ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012. PARTS A, B, C, D ed. Vol. 7. 2012. p. 3035-3039 https://doi.org/10.1115/IMECE2012-85461
Peker, M. F. ; Cora, Ö N. ; Koç, Muammer. / Surface topography evolution during long-run micro-stamping of bipolar plates (BPPs) and effects on corrosion and contact resistance characteristics. ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012. Vol. 7 PARTS A, B, C, D. ed. 2012. pp. 3035-3039
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