Details
| Original language | English |
|---|---|
| Title of host publication | 31st International Conference on Metallurgy and Materials, METAL 2022 |
| Pages | 250-255 |
| Number of pages | 6 |
| ISBN (electronic) | 9788088365068 |
| Publication status | Published - 30 Jun 2022 |
| Event | 31st International Conference on Metallurgy and Materials, METAL 2022 - Brno, Czech Republic Duration: 18 May 2022 → 19 May 2022 |
Publication series
| Name | METAL Conference Proeedings |
|---|---|
| ISSN (Print) | 2694-9296 |
Abstract
During cold forming of metastable austenitic steels, a strength-increasing phase transformation induced by externally superimposed stresses occurs in addition to strain hardening. The effect of deformation-induced martensite formation has so far not been utilized industrially in the area of bulk forming, but could be suitable for the production of highly-loaded components in oxidative atmospheres. The aim of this study is the analysis of local phase transformations in metastable austenitic steels in the boundary layer of bulk formed components. For this purpose, the relationship between the process conditions occurring during bulk metal forming and the resulting martensitic phase fraction was determined. Cylinder compression tests are carried out in which the influence of various process parameters can be investigated. These include forming temperature, true plastic strain and forming speed. In a quantitative measurement by means of a magnetic induction process, local martensite formation is determined and hardness measurements are carried out. The recorded flow stress curves are implemented in a numerical simulation. Furthermore, the influence of different tool surface topographies on the contact conditions of the workpiece-tool system is characterized by means of ring compression tests. With the numerical simulations and experimentally obtained results, a surface hardening process for bearing rings is designed. The relationship between local true plastic strain and deformation-induced martensite development is explained by material flow simulations, taking into account the process route for manufacturing the bearing ring and the varying friction factors.
Keywords
- Bulk metal forming, local martensite formation, phase transformation
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Surfaces, Coatings and Films
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31st International Conference on Metallurgy and Materials, METAL 2022. 2022. p. 250-255 (METAL Conference Proeedings).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Functionalisation of the Boundary Layer by Deformation-Induced Martensite on Bearing Rings by means of Bulk Metal Forming Processes
AU - Behrens, Bernd Arno
AU - Brunotte, Kai
AU - Wester, Hendrik
AU - Peddinghausen, Julius
AU - Till, Michael
N1 - Funding Information: The authors would like to thank the German Research Foundation (DFG) for the financial support of the project (Project-No. 423160066)
PY - 2022/6/30
Y1 - 2022/6/30
N2 - During cold forming of metastable austenitic steels, a strength-increasing phase transformation induced by externally superimposed stresses occurs in addition to strain hardening. The effect of deformation-induced martensite formation has so far not been utilized industrially in the area of bulk forming, but could be suitable for the production of highly-loaded components in oxidative atmospheres. The aim of this study is the analysis of local phase transformations in metastable austenitic steels in the boundary layer of bulk formed components. For this purpose, the relationship between the process conditions occurring during bulk metal forming and the resulting martensitic phase fraction was determined. Cylinder compression tests are carried out in which the influence of various process parameters can be investigated. These include forming temperature, true plastic strain and forming speed. In a quantitative measurement by means of a magnetic induction process, local martensite formation is determined and hardness measurements are carried out. The recorded flow stress curves are implemented in a numerical simulation. Furthermore, the influence of different tool surface topographies on the contact conditions of the workpiece-tool system is characterized by means of ring compression tests. With the numerical simulations and experimentally obtained results, a surface hardening process for bearing rings is designed. The relationship between local true plastic strain and deformation-induced martensite development is explained by material flow simulations, taking into account the process route for manufacturing the bearing ring and the varying friction factors.
AB - During cold forming of metastable austenitic steels, a strength-increasing phase transformation induced by externally superimposed stresses occurs in addition to strain hardening. The effect of deformation-induced martensite formation has so far not been utilized industrially in the area of bulk forming, but could be suitable for the production of highly-loaded components in oxidative atmospheres. The aim of this study is the analysis of local phase transformations in metastable austenitic steels in the boundary layer of bulk formed components. For this purpose, the relationship between the process conditions occurring during bulk metal forming and the resulting martensitic phase fraction was determined. Cylinder compression tests are carried out in which the influence of various process parameters can be investigated. These include forming temperature, true plastic strain and forming speed. In a quantitative measurement by means of a magnetic induction process, local martensite formation is determined and hardness measurements are carried out. The recorded flow stress curves are implemented in a numerical simulation. Furthermore, the influence of different tool surface topographies on the contact conditions of the workpiece-tool system is characterized by means of ring compression tests. With the numerical simulations and experimentally obtained results, a surface hardening process for bearing rings is designed. The relationship between local true plastic strain and deformation-induced martensite development is explained by material flow simulations, taking into account the process route for manufacturing the bearing ring and the varying friction factors.
KW - Bulk metal forming
KW - local martensite formation
KW - phase transformation
UR - http://www.scopus.com/inward/record.url?scp=85144144123&partnerID=8YFLogxK
U2 - 10.37904/metal.2022.4394
DO - 10.37904/metal.2022.4394
M3 - Conference contribution
AN - SCOPUS:85144144123
T3 - METAL Conference Proeedings
SP - 250
EP - 255
BT - 31st International Conference on Metallurgy and Materials, METAL 2022
T2 - 31st International Conference on Metallurgy and Materials, METAL 2022
Y2 - 18 May 2022 through 19 May 2022
ER -