Nanosized precipitates and dislocation networks reinforced C-containing CoCrFeNi high-entropy alloy fabricated by selective laser melting
Nanosized precipitates and dislocation networks reinforced C-containing CoCrFeNi high-entropy alloy fabricated by selective laser melting
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选区激光熔化制备纳米析出物和位错网络增强含C CoCrFeNi高熵合金
DOI:
10.1016/j.matchar.2018.08.019
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发表时间:
2018-10
影响因子:
4.7
通讯作者:
Min Song
中科院分区:
文献类型:
--
作者:
Wenqian Wu;Rui Zhou;Bingqiang Wei;Song Ni;Yong Liu;Min Song
In this paper, we report a selective laser melted C-containing CoCrFeNi high-entropy alloy (HEA) with unique cellular and columnar subgrain structures. The subgrain boundaries are made of dislocation networks decorated by the segregation of Cr element and nanosized M23C6-type carbides. Structural characterization of dislocations and dislocation reactions in dislocation networks was conducted using high-resolution transmission electron microscopy. The high strength of the C-containing HEA is attributed to dislocation networks strengthening and nanosized carbides strengthening. These findings can provide a guidance for developing HEAs with superior mechanical properties, particularly high strength.
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DOI:
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发表时间:
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影响因子:
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