Influence of irradiation temperature on void swelling in NiCoFeCrMn and NiCoFeCrPd

SCRIPTA MATERIALIA

卷:158

Article

Yang, Tai-ni¹  Lu, Chenyang¹  Velisa, Gihan²  Jin, Ke²  Xiu, Pengyuan¹  Zhang, Yanwen^2,3  Bei, Hongbin²  Wang, Lumin^1,4 

[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2009, Oak Ridge, TN 37831 USA

[3] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[4] Univ Michigan, Dept Mat Sci Engn, Ann Arbor, MI 48109 USA

关键词: Ion irradiation;    Temperature dependent void swelling;    High-entropy alloys;    Transmission electron microscope (TEM);   

DOI  :  10.1016/j.scriptamat.2018.08.021

来源: Elsevier

【 摘 要 】

Using ion irradiation and transmission electron microscopy, temperature dependent void swelling and dislocation loop evolution in equiatomic NiCoFeCrMn and NiCoFeCrPd high entropy alloys were investigated. Voids were observed in all tested conditions. An order higher of swelling was observed in both HEM as temperature increased from 420 to 580 degrees C. Alloying with Pd was found to have a stronger suppression effect on void and dislocation loop growth than alloying with Mn. Possible contributions to the swelling resistance were explored, including localized lattice distortion and higher defect migration barrier in NiCoFeCrPd. Additionally, no phase decomposition was observed in either alloy. Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

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