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Effect of a fourth alloying element on the microstructure and mechanical properties of Cu–Al–Ni shape memory alloys.
- Source :
- Journal of Materials Research; Jul2015, Vol. 30 Issue 14, p2258-2269, 12p
- Publication Year :
- 2015
-
Abstract
- The present investigation aims to enhance the mechanical properties and shape memory characteristics of Cu–Ni–Al shape memory alloys (SMAs) by alloying additional elements. These additions were found to control the phase morphology and grain size, along with the formation of different volume fractions, sizes, and distributions of precipitates. The features of the precipitates were mainly dependent on the type of alloying element. It was found that a Co (1.14 wt%) alloy gave the best overall improvement in terms of the transformation temperatures, ductility, and shape memory recovery. These improvements were mainly due to the exceptionally high presence of the γ2 phase in the microstructures of the modified alloy. The results of the current investigation were analyzed and compared to those of previous studies related to Cu–Al–Ni SMAs. [ABSTRACT FROM PUBLISHER]
- Subjects :
- SHAPE memory alloys
CRYSTAL morphology
GRAIN size
SMART materials
Subjects
Details
- Language :
- English
- ISSN :
- 08842914
- Volume :
- 30
- Issue :
- 14
- Database :
- Complementary Index
- Journal :
- Journal of Materials Research
- Publication Type :
- Academic Journal
- Accession number :
- 108608219
- Full Text :
- https://doi.org/10.1557/jmr.2015.196