Phase stability of V- based multi-principal element alloys
dataset
posted on 2022-05-19, 12:20 authored by Paul J. Barron, Alexander W. Carruthers, Huw Dawson, Maxwell T. P. Rigby, Sarah Haigh, Nick G. Jones, Ed J. Pickering<p>The success of fusion power requires alloys with good mechanical properties and the ability to withstand extreme thermal and irradiation conditions without prohibitive levels of activation or structural degradation. Body-centred cubic multi-principal component alloys, V–Cr–Mn and Ti–V–Cr–Mn have shown promising high-temperature stability at <math><mn>1200</mn><mrow><mo>∘</mo></mrow><mrow><mi>C</mi></mrow></math>. For the alloys to be suitable for use in nuclear fusion reactors, they must be stable across a wide range of temperatures relevant to fusion applications. Here, we assess alloy microstructural stability in these systems following long-term heat treatments at various temperatures. Encouragingly, most of the alloys showed no significant change in microstructure across all temperatures. This contrasts with many other multi-principal component alloys, which develop complex microstructures after exposure to intermediate temperatures.</p>
Funding
The authors acknowledge funding from the EPSRC Centre for Doctoral Training in Fusion Energy [grant number EP/L01663X/1] as well as EPSRC grant EP/R021546/1. This work has been part-funded by the RCUK Energy Programme [grant number EP/T012250/1]. We also wish to acknowledge the support of the Henry Royce Institute for Advanced Materials for access to the FEI Talos electron microscope at Royce@Manchester, funded through EPSRC grants EP/R00661X/1, EP/S019367/1, EP/P025021/1 and EP/P025498/1. E. Pickering wishes to acknowledge the same funds for supporting his Research Lead role within Royce.
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