Abstract
This article presents a model to describe the constitutive behaviour of corrosion-resistant Sandvik steel NanoflexTM [1] during metal forming and hardening. This material is characterised by different phenomena. The material is metastable, which causes strain-induced transformation to take place during metal forming. Depending on the annealing conditions, the material also transforms isothermally [2, 3] (as opposed to a-thermal martensite). This transformation can also take place immediately after forming, as a result of the residual stresses present in the material. The martensite phase of this material can be aged [4]. Results of the various measurements on Sandvik NanoflexTM are shown. The measurements mainly involved tensile tests and upsetting tests, during which both isothermal transformation and strain-induced transformation were measured by inductive sensors[5] and they were afterwards examined. The hardening of the material and the increase in hardness during ageing was also examined.
Finally, a constitutive model based on literature and the measurement are presented. This model describes the isothermal,
stress-assisted transformation, strain-induced transformation, work hardening and ageing. The model has been set up in such
a way that it can be simply implemented in a FEM code
Original language | English |
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Title of host publication | Materials processing and design : modeling, simulation and applications |
Subtitle of host publication | NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes |
Editors | Somnath Chosh, Jose M. Castro, June K. Lee |
Place of Publication | Melville, NY |
Publisher | American Institute of Physics |
Pages | 1670-1675 |
ISBN (Electronic) | 0-7354-0189-6 |
ISBN (Print) | 0-7354-0188-8 |
DOIs | |
Publication status | Published - 13 Jun 2004 |
Event | 8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004 - Columbus, United States Duration: 13 Jun 2004 → 17 Jun 2004 Conference number: 8 |
Publication series
Name | AIP Conference Proceedings |
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Publisher | AIP |
Volume | 712 |
ISSN (Print) | 0094-243X |
Conference
Conference | 8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004 |
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Abbreviated title | NUMIFORM |
Country/Territory | United States |
City | Columbus |
Period | 13/06/04 → 17/06/04 |
Keywords
- Materials forming
- Educational assessment
- Alloys
- Metallurgy
- Corrosion
- Materials heat treatment Phase transitions