Irradiation-enhanced α′ precipitation in model FeCrAl alloys

SCRIPTA MATERIALIA

卷:116

Article

Edmondson, P. D.¹  Briggs, S. A.^1,2  Yamamoto, Y.¹  Howard, R. H.³  Sridharan, K.²  Terrani, K. A.³  Field, K. G.¹ 

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

[3] Oak Ridge Natl Lab, Nucl Sci & Engn Directorate, Oak Ridge, TN 37831 USA

关键词: APT;    FeCrAl;    Alpha prime;    Neutron irradiation;   

DOI  :  10.1016/j.scriptamat.2016.02.002

来源: Elsevier

【 摘 要 】

Model FeCrAl alloys with varying compositions (Fe(10-18)Cr(10-6)Al at.%) have been neutron irradiated at similar to 320 to damage levels of similar to 7 displacements per atom (dpa) to investigate the compositional influence on the formation of irradiation-induced Cr-rich alpha' precipitates using atom probe tomography. In all alloys, significant number densities of these precipitates were observed. Cluster compositions were investigated and it was found that the average cluster Cr content ranged between 51.1 and 62.5 at.% dependent on initial compositions. This is significantly lower than the Cr-content of alpha' in binary FeCr alloys. Significant partitioning of the Al from the alpha' precipitates was also observed. Published by Elsevier Ltd.

【 授权许可】

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