| Autor: |
Chi-Feng Lin, Tao-Hsing Chen, Yan-Wei Yang |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 20, Iss , Pp 4137-4147 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2022.08.145 |
| Popis: |
The compressive mechanical behavior and fracture characteristics of FeAl intermetallic alloys containing 0–9 at.% Nb were investigated over a wide strain rate range of 10−3 s−1 to 5 × 103 s−1. For all of the alloys, the flow stress and strain rate sensitivity increased with increasing strain rate; however, the fracture strain decreased. The addition of Nb improved both the compressive strength and the ductility of the alloys. Among the various alloys, the alloy containing 6 at.% Nb showed the highest yield stress and fracture strain. The optical microscopy observations and X-ray diffraction results showed that the change in mechanical behavior of the various FeAl–Nb alloys was due mainly to differences in the precipitation of (Fe,Al)2Nb Laves phase. Moreover, a higher level of Nb addition prompted a change in the fracture morphology from a brittle fracture mode to a ductile fracture mode. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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