Mechanical behavior of the HfNbZrTi high entropy alloy after ion irradiation based on micro-pillar compression tests

Autor:	Zhaohui Dong, Xin Yi, Ying Liu, Yangyang Cheng, Xun Guo, Ke Jin, Nannan Jia, Huiling Duan, Shengyuan Peng, Jianming Xue
Rok vydání:	2022
Předmět:	Materials science Mechanical Engineering High entropy alloys Alloy Metals and Alloys Pillar engineering.material Compression (physics) Ion Metal Mechanics of Materials visual_art Materials Chemistry engineering visual_art.visual_art_medium Irradiation Composite material Saturation (magnetic)
Zdroj:	Journal of Alloys and Compounds. 892:162043
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2021.162043
Popis:	High entropy alloys (HEAs) have exhibited excellent irradiation resistance regarding structure stability. However, limited knowledge has been available on the tendency of mechanical properties of HEAs with body-centered cubic structures after ion irradiation. In this study, the evolution of mechanical properties of the HfNbZrTi irradiated with 3 MeV C ions is studied based on micropillar compression tests. The yield strength increases almost linearly from 974 to 2068 MPa with increasing irradiation doses up to 0.98 dpa. The correlation between the mechanical and microstructural changes agrees well with the prediction of Δ δ y = α M G b ( N D ) 1 2 , indicating a similar strengthening mechanism with conventional alloys. Nonetheless, the irradiation strengthening effect in this alloy is less pronounced in the low dose regime, and the saturation is postponed, compared with the stainless steel and the 3d metal high entropy alloys with face-centered cubic structures, exhibiting promising irradiation resistance regarding mechanical properties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c11aaa8ad8cfd91673f7f6dbb6bf2884 https://doi.org/10.1016/j.jallcom.2021.162043 Zobrazit plný text záznamu Full Text from ScienceDirect