Szczegóły publikacji
Opis bibliograficzny
Influence of heat treatment on the microstructure and corrosion behavior of thixo-cast $Mg-Y-Nd-Zr$ / Z. SZKLARZ, Ł. Rogal // Journal of Materials Engineering and Performance ; ISSN 1059-9495. — 2020 — vol. 29 iss. 9, s. 6181–6195. — Bibliogr. s. 6193–6195
Autorzy (2)
- AGHSzklarz Zbigniew
- Rogal Łukasz
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 130658 |
|---|---|
| Data dodania do BaDAP | 2020-10-15 |
| Tekst źródłowy | URL |
| DOI | 10.1007/s11665-020-05085-1 |
| Rok publikacji | 2020 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Journal of Materials Engineering and Performance |
Abstract
The influence of semisolid metal processing (SSM, also called thixoforming) and T6 heat treatment (HT) on the microstructure and corrosion behavior in chlorides of Mg-Y-Nd-Zr (WE43B) magnesium alloy was investigated. The as-cast microstructure is composed of alpha-Mg grains with the size of 52.8 +/- 1.9 mu m surrounded by eutectic precipitations enriched in rare-earth elements (Y, Nd). The thixo-cast microstructure contained alpha-Mg globular grains with the size of 65.5 +/- 2.1 mu m surrounded by a fine eutectic mixture in the volume of 26.6%. The T6 HT (heat treatment and saturation at 525 degrees C/5 h, cooling in H2O and aging at 190 degrees C/48 h) caused an increase of yield strength to 180 MPa and tensile strength to 280 MPa at the hardness 105 +/- 4 HV5. Next, the electrochemical response was investigated in 0.1 M NaCl using the global and local LSV (linear sweep voltammetry) and EIS (electrochemical impedance spectroscopy) methods. The EIS method suggests the same mechanism for the processes occurring at the electrode/electrolyte interface and shows higher values of the polarization resistances of treated samples after 24-h immersion tests. In particular, better corrosion resistance in chlorides is observed in the alloy after SSM compared to the SSM/HT specimen, which has also been confirmed by the LSV tests performed after 24-h immersion. By using a local technique, a higher susceptibility of the matrix of SSM and SSM/HT samples to pitting corrosion has been revealed.
