Szczegóły publikacji
Opis bibliograficzny
The influence of cooling rate on the damping characteristics of the ZnAl4Cu1 alloy / Grzegorz PIWOWARSKI, Beata GRACZ // Journal of Casting & Materials Engineering [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2543-9901. — 2022 — vol. 6 iss. 3, s. 58–63. — Bibliogr. s. 62–63, Abstr. — Publikacja dostępna online od: 2022-08-08
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 143085 |
|---|---|
| Data dodania do BaDAP | 2022-10-14 |
| Tekst źródłowy | URL |
| DOI | 10.7494/jcme.2022.6.3.58 |
| Rok publikacji | 2022 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Journal of Casting & Materials Engineering |
Abstract
The paper presents the results of damping coefficient tests in the ZnAl4Cu1 alloy (ZL5). The damping coefficient has been calculated on the basis of specimen measurements obtained with the use of the signal echo method. The method consists in passing the ultrasonic wave through the tested material. The ultrasonic wave from a transmitting and receiving head passes through a specimen, bounces off its bottom surface and comes back to the measuring head in the form of a signal echo. Difference in the signal strength between the first and the second echo in relation to the distance travelled by the ultrasound wave is a measure of the material’s damping characteristics. The specimens were cast into three molds made of different materials, i.e. green sand, plaster and metal. Thermophysical properties of these materials are different what affecting the rate of heat absorption from the cast. Three series of specimens have been obtained which cooled at different rates. The specimens were then subjected to ultrasound and microscopic tests to assess the alloy structure. The internal alloy structure affects its damping properties to a great extent.