Transformation Induced Plasticity (Trip) in a Maraging Steel
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An extensive experimental program on a 9 % Ni, 12% Cr, 2% Mo steel maraging steel is introduced. For the specific purpose of studying the physical phenomenon of transformation induced plasticity this material exhibits some very desirable features: The martensite start temperature (M
) can be found around 150°C; the martensitic finish temperature (M
) is at ca. 80°C. The material has a yield stress of about 200 MPa at ca. 200°C (fully austenitic state) and of ca. 900 MPa at room temperature (fully martensitic state). Plastification is accompanied by rather small hardening up to a strain of roughly 8 %. Since the martensitic transformation takes place at a low temperature level upon cooling on air only, this material can be considered as an ideal testing material with practically no creep effects during and after transformation. First of all dilatation tests are demonstrated for two types of specimens: longitudinal, also called axial specimens with a fiber texture and radial specimens, as shown in Figure lb. A material characterization using M
lines, i.e. martensite start and finish temperature monitored for different loading conditions and stress levels reveals the influence of the type of loading (tension, shear, compression). Consequently two different loading histories are tested:
loading above M
and then cooling, accompanied by partial or full unloading, loading at a constant temperature in the transformation temperature interval.
loading above M s and then cooling, accompanied by partial or full unloading,
loading at a constant temperature in the transformation temperature interval.
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- Transformation Induced Plasticity (Trip) in a Maraging Steel
- Book Title
- IUTAM Symposium on Mechanics of Martensitic Phase Transformation in Solids
- Book Subtitle
- Proceedings of the IUTAM Symposium held in Hong Kong, China, 11–15 June 2001
- pp 87-94
- Print ISBN
- Online ISBN
- Series Title
- Solid Mechanics and Its Applications
- Series Volume
- Series ISSN
- Springer Netherlands
- Copyright Holder
- Springer Science+Business Media B.V.
- Additional Links
- eBook Packages
- Q. P. Sun (2) (3)
- Editor Affiliations
- 2. Department of Mechanical Engineering, The Hong Kong University of Science and Technology
- 3. Department of Engineering Mechanics, Tsinghua University
- Author Affiliations
- 4. Institute of Mechanics, Montanuniversität Leoben, Franz-Josef-Straße 18, A-8700, Leoben, Austria
- 5. Dept. of Aerospace Engineering, Tokyo Metropolitan Institute of Technology, Asahigaoka 6-6, J-191-0065, Hino/Tokyo, Japan
- 6. Centre des Matériaux, Ecole des Mines, B.P. 87, F-91003, Evry Cedex, France
- 7. Institute of Metal Physics, Montanuniversität Leoben, Jahnstraße 12, A-8700, Leoben, Austria
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