激光合金化法制备高熵涂层

IF 1.1 Q3 METALLURGY & METALLURGICAL ENGINEERING
V. Girzhon, V. Yemelianchenko, O. Smolyakov
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引用次数: 0

摘要

采用XRD、EDX和金相分析研究了激光合金化工艺纯铝表层制备的Al-Co-Cr-Cu-Fe-Ni体系高熵合金的组织相态。结果表明,在激光合金化过程中,形成了高熵合金典型的基于BCC晶格的有序多组分取代固溶体。考虑熔体冷却速率,模拟了高熵合金AlCoCrCuFeNi和Al3CoCrCuFeNi的非均相结晶过程。结果表明,该组织的形成是熔体冷却速度快和激光合金化区铝含量高的结果。在平衡条件下获得的合金表面显微硬度高于该体系的高熵合金,达到6.59 GPa。分析了影响显微硬度高值的其他原因。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High entropy coating from AlCoCrCuFeNi alloy, obtained by laser alloying
The structural-phase state of the Al-Co-Cr-Cu-Fe-Ni system high-entropy alloy obtained by laser alloying of technically pure aluminium surface layers was investigated by XRD, EDX and metallographic analyses. It is shown that in the process of laser alloying the formation of an an ordered multicomponent substitution solid solution based on BCC lattice took place, which is typical for high-entropy alloys. The process of heterogeneous crystallization of high-entropy alloys AlCoCrCuFeNi and Al3CoCrCuFeNi was modeled taking into account cooling rates of the melt. It is established that the formation of the obtained structure is a consequence of high cooling rates of the melt and high content of aluminum in the laser alloying zone. The microhardness of the alloyed surface was higher compared to high-entropy alloys of this system obtained under equilibrium conditions and was equal to 6.59 GPa. Additional reasons that may affect the high values of microhardness are analysed.
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来源期刊
Acta Metallurgica Slovaca
Acta Metallurgica Slovaca METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
2.00
自引率
30.00%
发文量
22
审稿时长
12 weeks
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