Details
| Original language | English |
|---|---|
| Pages (from-to) | 84-94 |
| Number of pages | 11 |
| Journal | Shape Memory and Superelasticity |
| Volume | 5 |
| Issue number | 1 |
| Early online date | 18 Jan 2019 |
| Publication status | Published - 15 Mar 2019 |
| Event | 2nd International Conference on High Temperature Shape Memory Alloys - Irsee, Germany Duration: 15 May 2018 → 18 May 2018 |
Abstract
Co–Ni–Ga alloys represent a new class of promising high-temperature shape memory alloys allowing realization of functional components for applications at elevated temperatures. Single crystals show a fully reversible pseudoelastic response at temperatures up to 500 °C. However, for most industrial applications, the application of polycrystalline material is needed. Polycrystalline Co–Ni–Ga alloys suffer from the anisotropic properties inherent to shape memory alloys, i.e., a strong orientation dependence of transformation strains, and therefore, are prone to intergranular fracture. This drawback can be curtailed by using appropriately textured material with a favorable grain-boundary orientation distribution. The current study discusses the impact of a hot-extrusion process on microstructural evolution and functional properties of polycrystalline Co–Ni–Ga high-temperature shape memory alloys paving the way to their robust application.
Keywords
- Abnormal grain growth, High-temperature shape memory alloy, Hot extrusion, Pseudoelasticity
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
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In: Shape Memory and Superelasticity, Vol. 5, No. 1, 15.03.2019, p. 84-94.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Tailoring the Microstructure in Polycrystalline Co–Ni–Ga High-Temperature Shape Memory Alloys by Hot Extrusion
AU - Karsten, E.
AU - Gerstein, G.
AU - Golovko, O.
AU - Dalinger, A.
AU - Lauhoff, C.
AU - Krooss, P.
AU - Niendorf, T.
AU - Samsonenko, A.
AU - Maier, H. J.
N1 - Funding Information: Financial support by the Deutsche Forschungsgemeinschaft (DFG) within the Research Unit Program “Hochtemperatur-Formgedächtnislegierungen” (Project Number 200999873; Grant Nos. NI1327/3-2 and MA1175/34-2) is gratefully acknowledged.
PY - 2019/3/15
Y1 - 2019/3/15
N2 - Co–Ni–Ga alloys represent a new class of promising high-temperature shape memory alloys allowing realization of functional components for applications at elevated temperatures. Single crystals show a fully reversible pseudoelastic response at temperatures up to 500 °C. However, for most industrial applications, the application of polycrystalline material is needed. Polycrystalline Co–Ni–Ga alloys suffer from the anisotropic properties inherent to shape memory alloys, i.e., a strong orientation dependence of transformation strains, and therefore, are prone to intergranular fracture. This drawback can be curtailed by using appropriately textured material with a favorable grain-boundary orientation distribution. The current study discusses the impact of a hot-extrusion process on microstructural evolution and functional properties of polycrystalline Co–Ni–Ga high-temperature shape memory alloys paving the way to their robust application.
AB - Co–Ni–Ga alloys represent a new class of promising high-temperature shape memory alloys allowing realization of functional components for applications at elevated temperatures. Single crystals show a fully reversible pseudoelastic response at temperatures up to 500 °C. However, for most industrial applications, the application of polycrystalline material is needed. Polycrystalline Co–Ni–Ga alloys suffer from the anisotropic properties inherent to shape memory alloys, i.e., a strong orientation dependence of transformation strains, and therefore, are prone to intergranular fracture. This drawback can be curtailed by using appropriately textured material with a favorable grain-boundary orientation distribution. The current study discusses the impact of a hot-extrusion process on microstructural evolution and functional properties of polycrystalline Co–Ni–Ga high-temperature shape memory alloys paving the way to their robust application.
KW - Abnormal grain growth
KW - High-temperature shape memory alloy
KW - Hot extrusion
KW - Pseudoelasticity
UR - http://www.scopus.com/inward/record.url?scp=85070863320&partnerID=8YFLogxK
U2 - 10.1007/s40830-019-00208-7
DO - 10.1007/s40830-019-00208-7
M3 - Conference article
AN - SCOPUS:85070863320
VL - 5
SP - 84
EP - 94
JO - Shape Memory and Superelasticity
JF - Shape Memory and Superelasticity
SN - 2199-384X
IS - 1
T2 - 2nd International Conference on High Temperature Shape Memory Alloys
Y2 - 15 May 2018 through 18 May 2018
ER -