Details
| Original language | English |
|---|---|
| Article number | 143917 |
| Journal | Materials Science and Engineering: A |
| Volume | 855 |
| Early online date | 5 Sept 2022 |
| Publication status | Published - 10 Oct 2022 |
| Externally published | Yes |
Abstract
This study systematically investigated the effects of heat and thermomechanical treatments on the pseudo-elastic behavior of an Fe-based shape-memory alloy (Fe–17Mn–5Si–10Cr–4Ni-1(V, C) %wt.). First, samples were solution-annealed at 1000 °C for 2 h and aged at 760 °C for 6 h. A thermomechanical treatment was then applied to the heat-treated samples. The microstructure and mechanical properties (i.e., 0.1% yield stress and pseudo-elasticity) were characterized using X-ray diffraction, scanning and transmission electron microscopy, and uniaxial tensile tests. The results showed that decreasing the grain size and precipitation of VCs resulted in an improved pseudo-elasticity. The thermomechanical treatment decreased the number of thermal twins and developed a [111] texture in the austenite phase, which reduced the critical stress for inducing martensite. The presence of VC precipitates and texture formation in the thermomechanical-treated samples increased the pseudo-elastic strain more than twofold from 0.4 to 0.98%.
Keywords
- Iron-based shape memory alloy (Fe-SMA), Superelasticity, Thermomechanical treatment
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Materials Science and Engineering: A, Vol. 855, 143917, 10.10.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effect of thermomechanical treatment and microstructure on pseudo-elastic behavior of Fe–Mn–Si–Cr–Ni-(V, C) shape memory alloy
AU - Mohri, Maryam
AU - Ferretto, Irene
AU - Leinenbach, Christian
AU - Kim, Dohyung
AU - Lignos, Dimitrios G.
AU - Ghafoori, Elyas
N1 - Funding information: This study was funded by the EMPAPOSTDOCS-II program , which received funding from the European Union Horizon 2020 research and innovation program under the Marie Sk?odowska-Curie grant agreement number 754364 . The contribution of re-fer AG in providing the test materials is also acknowledged. Any opinion and findings in this paper are those of the authors and do not necessarily reflect the view of the sponsors.
PY - 2022/10/10
Y1 - 2022/10/10
N2 - This study systematically investigated the effects of heat and thermomechanical treatments on the pseudo-elastic behavior of an Fe-based shape-memory alloy (Fe–17Mn–5Si–10Cr–4Ni-1(V, C) %wt.). First, samples were solution-annealed at 1000 °C for 2 h and aged at 760 °C for 6 h. A thermomechanical treatment was then applied to the heat-treated samples. The microstructure and mechanical properties (i.e., 0.1% yield stress and pseudo-elasticity) were characterized using X-ray diffraction, scanning and transmission electron microscopy, and uniaxial tensile tests. The results showed that decreasing the grain size and precipitation of VCs resulted in an improved pseudo-elasticity. The thermomechanical treatment decreased the number of thermal twins and developed a [111] texture in the austenite phase, which reduced the critical stress for inducing martensite. The presence of VC precipitates and texture formation in the thermomechanical-treated samples increased the pseudo-elastic strain more than twofold from 0.4 to 0.98%.
AB - This study systematically investigated the effects of heat and thermomechanical treatments on the pseudo-elastic behavior of an Fe-based shape-memory alloy (Fe–17Mn–5Si–10Cr–4Ni-1(V, C) %wt.). First, samples were solution-annealed at 1000 °C for 2 h and aged at 760 °C for 6 h. A thermomechanical treatment was then applied to the heat-treated samples. The microstructure and mechanical properties (i.e., 0.1% yield stress and pseudo-elasticity) were characterized using X-ray diffraction, scanning and transmission electron microscopy, and uniaxial tensile tests. The results showed that decreasing the grain size and precipitation of VCs resulted in an improved pseudo-elasticity. The thermomechanical treatment decreased the number of thermal twins and developed a [111] texture in the austenite phase, which reduced the critical stress for inducing martensite. The presence of VC precipitates and texture formation in the thermomechanical-treated samples increased the pseudo-elastic strain more than twofold from 0.4 to 0.98%.
KW - Iron-based shape memory alloy (Fe-SMA)
KW - Superelasticity
KW - Thermomechanical treatment
UR - http://www.scopus.com/inward/record.url?scp=85137270434&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2022.143917
DO - 10.1016/j.msea.2022.143917
M3 - Article
VL - 855
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
M1 - 143917
ER -