Szczegóły publikacji
Opis bibliograficzny
Studies on the two-step aging process of Fe-based shape memory single crystals / Monika Czerny, Grzegorz CIOS, Wojciech Maziarz, Yuri Chumlyakov, Robert Chulist // Materials [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1996-1944. — 2020 — vol. 13 iss. 7 art. no. 1724, s. 1–10. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 8–10, Abstr. — Publikacja dostępna online od: 2020-04-07. — R. Chulist – afiliacja: Instytut Metalurgii i Inżynierii Materiałowej PAN, Kraków
Autorzy (5)
- Czerny Monika
- AGHCios Grzegorz
- Maziarz Wojciech
- Chumlyakov Yury
- Chulist Robert
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 128371 |
|---|---|
| Data dodania do BaDAP | 2020-04-21 |
| Tekst źródłowy | URL |
| DOI | 10.3390/ma13071724 |
| Rok publikacji | 2020 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Materials |
Abstract
Fe50Ni28Co17Al11.5Ta2.5 single crystals oriented along the [001] direction were investigated in order to establish the influence of two-step aging conditions on superelastic properties. The homogenized and quenched single crystalline material was subjected to a combination of high-temperature and low-temperature heat treatment at 973 K for 0.5 h and at 723 K for various aging times, respectively. As a result, fine and coherent γ’ precipitates were formed. Using diffraction of high energy synchrotron radiation, the volume fraction of γ’ precipitates was computed while their size was determined by high resolution TEM analysis. Compared with one-step heat treatment, the two-step aging process enables control of the precipitate size in a more accurate way. Moreover, it allows one to obtain a higher volume fraction of precipitates without increasing their size significantly. The obtained coherent γ’ precipitates ranged in size from 5 to 8 nm; that considerably improved mechanical properties. The highest superelastic response was obtained for single crystals aged at 973 K for 0.5 h followed by aging at 723 K for 3 h. The single crystals treated with such conditions exhibited a superelastic strain of 15% in which the mechanical martensite stabilization was substantially suppressed.
