Szczegóły publikacji
Opis bibliograficzny
Microstructure and mechanical properties of LENS manufactured NiTi shape memory alloy after ageing and during in-situ SEM tensile test / Jan Dutkiewicz, Łukasz Rogal, Damian Kalita, Katarzyna BERENT, Jakub KAWAŁKO, Anna Antolak-Dudka, Tomasz Durejko, Tomasz Czujko, Eduard Cesari // Journal of Material Science and Metallurgy [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2768-1912. — 2021 — vol. 2 iss. 1 art. no. 104, s. 1–17. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 15–17, Abstr.
Autorzy (9)
- Dutkiewicz Jan
- Rogal Łukasz
- Kalita Damian
- AGHBerent Katarzyna
- AGHKawałko Jakub
- Antolak-Dudka Anna
- Durejko Tomasz
- Czujko Tomasz
- Cesari Eduard
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 138173 |
|---|---|
| Data dodania do BaDAP | 2021-12-10 |
| Tekst źródłowy | URL |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Journal of Material Science and Metallurgy |
Abstract
The Laser Engineered Net Shaping additive manufacturing method was used to prepare NiTi samples. In the process spherical gas atomized powder with particle size in the range of 45 – 115 μm containing 50.08 at.% Ni was used. DSC studies showed additional peak after ageing due to R → B19’ phase formation during cooling and reverse transformation B19’ → R during heating. The martensitic transformation temperatures and the reverse transformation both increase with the ageing time. This was associated with the formation of Ni4Ti3 precipitates during the aging, as identified for the alloy aged for 2h. As-deposited sample showed diffused DSC peaks corresponding to martensitic transformation and a good superelastic properties at RT, however after 4% strain a residual strain of 0.7% was observed. In the case of aged sample strained at room temperature a deformation of martensite occured, whereas the super elastic properties were observed at 53oC. Samples prepared for the in-situ tensile experiment using LENS method showed a strong <001> texture parallel to the build direction. In-situ tensile deformation of LENS deposited sample caused nucleation of martensitic plates first at the surface of samples; then plates nucleate preferentially at grain boundaries and propagate across grains. From the PFs measurements a following crystallographic relationship was most frequently observed: (001)B19’ || (01 )B2 and [100] B19’ || [100]B2, however other variants were also observed. Existence of martensite twins was on (110) and (10 ) planes was observed. In-situ tensile deformation of samples aged 2h/500oC causes a decrease of plate thickness from 1.15 μm to 0.9 μm, what suggests partici- pation of strain field near Ni4Ti3 precipitates in more frequent nucleation of martensitic plates. Furthermore, more variety of crystallographic orientation relationships between cubic austenite phases like [010]B2 || [100]B19’ [001] TiNiB2|| [1 3]B19’ , [001]B2 || [011]B19’ , [100]B2 || [011]B19’ and others were observed. Some twin orientations were identified in martensite based on SEM microstructure and PF analysis, particularly at higher deformation of 8%.
