Significant hardening due to the formation of a sigma phase matrix in a high entropy alloy
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Pages (from-to) | 81-86 |
| Journal / Publication | Intermetallics |
| Volume | 33 |
| Online published | 6 Nov 2012 |
| Publication status | Published - Feb 2013 |
| Externally published | Yes |
Link(s)
Abstract
The hardening in Al0.3CrFe1.5MnNi0.5 high-entropy alloy not only nearly triples the hardness of the alloy, but also shows a quick hardening response and the absence of overaging. However, the crystal structure, morphology, and composition of the hardening phase have not yet been confirmed. Here, such information regarding the hardening phase is investigated. It was found that the hardening phase is a Cr-Mn-Fe ternary sigma phase. Unlike in conventional engineering alloys, the sigma phase is not precipitated from the matrix, instead, the whole BCC matrix transforms to sigma phase almost without changing its composition. Therefore, the hardening phenomenon is not a precipitation hardening reaction as suggested before. © 2012 Elsevier Ltd. All rights reserved.
Research Area(s)
- B. Age-hardening, B. Precipitates, F. Electron microscopy, transmission
Citation Format(s)
Significant hardening due to the formation of a sigma phase matrix in a high entropy alloy. / Tsai, Ming-Hung; Yuan, Hao; Cheng, Guangming et al.
In: Intermetallics, Vol. 33, 02.2013, p. 81-86.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
