Excellent superelasticity in a Co-Ni-Ga high-temperature shape memory alloy processed by directed energy deposition
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In: Materials Research Letters Volume 8 / Issue 8 (2020-04-30) , S. 314-320; eissn:2166-3831
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A Co-Ni-Ga high-temperature shape memory alloy has been additively manufactured by directed energy deposition. Due to the highly anisotropic microstructure, i.e. columnar grains featuring a strong near-⟨001⟩ texture in build direction, the as-built material is characterized by a very low degree of constraints and, thus, shows excellent superelasticity without conducting a post-process heat treatment. As characterized by in situ deformation testing and post-mortem microstructural analysis, additive manufacturing employing directed energy deposition seems to be highly promising for processing of shape memory alloys, which often suffer difficult workability. The present work establishes a new pathway towards realization of high performance shape memory alloys by additive manufacturing and, thus, will stimulate further research in this field directed towards application.
@article{doi:10.17170/kobra-202305097984,
author ={Lauhoff, Christian and Sommer, Niklas and Vollmer, Malte and Mienert, Gabriel and Krooß, Philipp and Böhm, Stefan and Niendorf, Thomas},
title ={Excellent superelasticity in a Co-Ni-Ga high-temperature shape memory alloy processed by directed energy deposition},
keywords ={620 and 660 and Memory-Legierung and Rapid Prototyping and Laserschmelzen and Pseudoelastizität and Mikrostruktur and Cobaltlegierung and Nickellegierung and Galliumlegierung},
copyright ={http://creativecommons.org/licenses/by/4.0/},
language ={en},
journal ={Materials Research Letters},
year ={2020-04-30}
}