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| Description
| - The hot stamping process for manufacturing car body components was patented in 1977 [1]. Its main advantages include the precision of the product shape, reduced spring-back and the resulting high strength of steel parts upon hardening. Boron and manganese-alloyed steels have been specially developed for this process. The 22MnB5 grade is a typical representative of this group with strength up to 1500 MPa [2]. For the desired mechanical properties to be achieved, the final microstructure should consist primarily of martensite without any substantial amounts of other phases. Further development of press hardening therefore requires that all phenomena associated with phase transformations during cooling between dies be well-mapped. Significant parameters in this respect include phase transformation temperatures and data on a number of additional phenomena, including transformation-induced plasticity. Transformation-induced plasticity manifests itself when a part held between dies undergoes phase transformation, i.e. typically under stress. In the course of lattice rearrangement, this stress causes atoms to occupy more favourable positions in terms of energy. On the macro-level, this can be detected as a change in dimensions, which, at the same time, significantly relieves stress and therefore eliminates spring-back. Despite the profound importance of this phenomenon to the press hardening process, it has not been explored in depth up to now. For these reasons, the 22MnB5 steel grade was employed for the following experiment. The impacts of tensile and compressive stresses occurring during phase transformations upon changes in expansion of sheet specimens were explored using schedules that simulated real-world hot stamping and press-hardening processes.
- The hot stamping process for manufacturing car body components was patented in 1977 [1]. Its main advantages include the precision of the product shape, reduced spring-back and the resulting high strength of steel parts upon hardening. Boron and manganese-alloyed steels have been specially developed for this process. The 22MnB5 grade is a typical representative of this group with strength up to 1500 MPa [2]. For the desired mechanical properties to be achieved, the final microstructure should consist primarily of martensite without any substantial amounts of other phases. Further development of press hardening therefore requires that all phenomena associated with phase transformations during cooling between dies be well-mapped. Significant parameters in this respect include phase transformation temperatures and data on a number of additional phenomena, including transformation-induced plasticity. Transformation-induced plasticity manifests itself when a part held between dies undergoes phase transformation, i.e. typically under stress. In the course of lattice rearrangement, this stress causes atoms to occupy more favourable positions in terms of energy. On the macro-level, this can be detected as a change in dimensions, which, at the same time, significantly relieves stress and therefore eliminates spring-back. Despite the profound importance of this phenomenon to the press hardening process, it has not been explored in depth up to now. For these reasons, the 22MnB5 steel grade was employed for the following experiment. The impacts of tensile and compressive stresses occurring during phase transformations upon changes in expansion of sheet specimens were explored using schedules that simulated real-world hot stamping and press-hardening processes. (en)
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| Title
| - Transformation-Induced Plasticity in Steel for Hot Stamping
- Transformation-Induced Plasticity in Steel for Hot Stamping (en)
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| skos:prefLabel
| - Transformation-Induced Plasticity in Steel for Hot Stamping
- Transformation-Induced Plasticity in Steel for Hot Stamping (en)
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| skos:notation
| - RIV/49777513:23210/14:43917284!RIV15-MSM-23210___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/49777513:23210/14:43917284
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - transformation-induced plasticity; 22MnB5; spring-back effect; hot stamping; press hardening (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Jirková, Hana
- Mašek, Bohuslav
- Štádler, Ctibor
- Feuser, Peter
- Selig, Mike
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| http://linked.open...ain/vavai/riv/wos
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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