The high entropy FeCoCrNiMn-(N,Si)alloy prepared by selective laser melting was first cold-rolled and then annealed at 500℃for a long time.The effect of long annealing on the phase stability and microstructure evolution was studied.The results indicate that three types of precipitates(Cr2N phase,BCC-Cr phase and L10-NiMn phase)form inside the alloy matrix after annealing at 500℃for 10-40 d.The existence of nitrogen atoms inhibits the formation of FeCo-rich phase.In addition,the size of precipitates increases obviously with the annealing time from 10 d to 20 d.While the annealing period further increases to 40 d,the size of precipitates particle remains the same.
关键词
高熵合金/氮掺杂/析出相/选区激光熔融/冷轧/退火处理
Key words
high entropy alloy/precipitation/selective laser melting/cold rolling/annealing treatment
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基金项目
国家重点研发计划项目(2022YFE0134400)
国家自然科学基金资助项目(51971247)
湖南省自然科学基金资助项目(2022JJ40588)
湖南省教育厅优秀青年项目(23B0009)
National Key Research and Development Program of China()