摘要
对选区激光熔融制备的FeCoCrNiMn-(N,Si)高熵合金先进行冷轧变形,然后在500℃进行长时间退火处理,研究长时间退火对其相稳定性及微观组织演变的影响。研究结果表明,在退火温度为500℃,退火时间为10~40 d时,合金基体内形成了3种类型的沉淀析出物(Cr_(2)N相、BCC-Cr相和L1_(0)-NiMn相),且氮原子的添加抑制了富FeCo相的形成;当退火时间从10 d增加到20 d时,沉淀物的尺寸显著增加。然而,当退火时间进一步增加到40 d时,沉淀物颗粒不长大,其尺寸保持不变。
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(Cr_(2)N phase,BCC-Cr phase and L1_(0)-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.
作者
张忠伦
顾及
宋旼
ZHANG Zhonglun;GU Ji;SONG Min(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;China National Building Material Group,Technology Innovation Academy,Zaozhuang 277100,China)
出处
《中南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2024年第8期3014-3021,共8页
Journal of Central South University:Science and Technology
基金
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)。
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
high entropy alloy
precipitation
selective laser melting
cold rolling
annealing treatment