Details
| Original language | English |
|---|---|
| Pages (from-to) | 271-283 |
| Number of pages | 13 |
| Journal | Production Engineering |
| Volume | 15 |
| Issue number | 2 |
| Early online date | 10 Feb 2021 |
| Publication status | Published - Apr 2021 |
Abstract
Metal forming of shape memory alloys (SMA) can be challenging since these are very often brittle due to their intermetallic character. However, formability is often needed not only for realising the desired geometry but also for tailoring the microstructure and the functional properties. To investigate whether the encapsulation in a steel shell can improve the formability of shape memory alloys, Co49Ni21Ga30 and Ni49.5Fe14.5Mn4.0Ga26.0Co6.0 samples were subjected to tensile tests, upsetting, rolling and extrusion. A ferritic steel (1.0503) was used as the shell material. The shell was employed to curtail the formation of tensile stresses in the core, to maintain high temperatures during processing and to prevent oxidation. With this approach, not only forming of the SMA in the steel shell was possible but also an intensive metallurgical bond between the SMA and the steel shell can be achieved during hot rolling or extrusion.
Keywords
- Extrusion, Hot deformation, Hot tensile tests, Metallurgical bonding, Rolling, SMA, Steel shell, Upsetting
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Production Engineering, Vol. 15, No. 2, 04.2021, p. 271-283.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Hot forming of shape memory alloys in steel shells
T2 - formability, interface, bonding quality
AU - Gerstein, Gregory
AU - Kahra, Christoph
AU - Golovko, Oleksandr
AU - Schäfke, Florian
AU - Klose, Christian
AU - Herbst, Sebastian
AU - Nürnberger, Florian
AU - Maier, Hans-Jürgen
N1 - Funding Information: Financial support by Deutsche Forschungsgemeinschaft (German Research Foundation) under project no. 252662854 is gratefully acknowledged. The authors also thank Dr. M. Rodman for help with the experiments. The Xradia 520 Versa used for the x-ray imaging was also funded by the DFG (Project No. 316923185).
PY - 2021/4
Y1 - 2021/4
N2 - Metal forming of shape memory alloys (SMA) can be challenging since these are very often brittle due to their intermetallic character. However, formability is often needed not only for realising the desired geometry but also for tailoring the microstructure and the functional properties. To investigate whether the encapsulation in a steel shell can improve the formability of shape memory alloys, Co49Ni21Ga30 and Ni49.5Fe14.5Mn4.0Ga26.0Co6.0 samples were subjected to tensile tests, upsetting, rolling and extrusion. A ferritic steel (1.0503) was used as the shell material. The shell was employed to curtail the formation of tensile stresses in the core, to maintain high temperatures during processing and to prevent oxidation. With this approach, not only forming of the SMA in the steel shell was possible but also an intensive metallurgical bond between the SMA and the steel shell can be achieved during hot rolling or extrusion.
AB - Metal forming of shape memory alloys (SMA) can be challenging since these are very often brittle due to their intermetallic character. However, formability is often needed not only for realising the desired geometry but also for tailoring the microstructure and the functional properties. To investigate whether the encapsulation in a steel shell can improve the formability of shape memory alloys, Co49Ni21Ga30 and Ni49.5Fe14.5Mn4.0Ga26.0Co6.0 samples were subjected to tensile tests, upsetting, rolling and extrusion. A ferritic steel (1.0503) was used as the shell material. The shell was employed to curtail the formation of tensile stresses in the core, to maintain high temperatures during processing and to prevent oxidation. With this approach, not only forming of the SMA in the steel shell was possible but also an intensive metallurgical bond between the SMA and the steel shell can be achieved during hot rolling or extrusion.
KW - Extrusion
KW - Hot deformation
KW - Hot tensile tests
KW - Metallurgical bonding
KW - Rolling
KW - SMA
KW - Steel shell
KW - Upsetting
UR - http://www.scopus.com/inward/record.url?scp=85100707351&partnerID=8YFLogxK
U2 - 10.1007/s11740-021-01024-8
DO - 10.1007/s11740-021-01024-8
M3 - Article
AN - SCOPUS:85100707351
VL - 15
SP - 271
EP - 283
JO - Production Engineering
JF - Production Engineering
SN - 0944-6524
IS - 2
ER -