| Issue |
Rev. Met. Paris
Volume 95, Number 10, Octobre 1998
|
|
|---|---|---|
| Page(s) | 1299 - 1310 | |
| DOI | https://doi.org/10.1051/metal/199895101299 | |
| Published online | 17 January 2017 | |
High strength TRIP/TWIP and superplastic steels : development, properties, application*
Fine grained high carbon superplastic steels and high manganese TRIP steels with amounts of aluminium of about 7 wt-% exhibit high strength and fracture toughness at room temperature. The duplex microstructure of these superplastic steels causes uniform elongations up to 1000 % at medium and higher temperature (up to 860 °C). The TRIP effect (transformation induced plasticity) causes large elongations of about 80 % and high work hardening rates at low temperature (- 100 to 20 °C). The unique properties of the superplastic and of the TRIP steels are used for near net shape forming of machine parts and for deep drawing operations of sheets to tailored blanks in the car body manufacturing.
© La Revue de Métallurgie 1998
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