摘要
在Cr_(20)Mn_(10)Fe_(30)Co_(30)Ni_(10)高熵合金熔炼过程中加入1%氮元素,结合均匀化热处理、室温冷轧和回复再结晶处理工艺来提高高熵合金的强度.研究结果表明:600℃1 h回复再结晶后,Cr_(20)Mn_(10)Fe_(30)Co_(30)Ni_(10)-1N高熵合金显微组织特征为异质结构,即由晶粒尺寸小、位错密度小的回复再结晶面心立方(FCC)晶粒和晶粒尺寸较大、有一定位错密度且发生回复的FCC晶粒,以及少量位错密度较高的轧制变形残余组织组成.与完全回复再结晶的Cr_(20)Mn_(10)Fe_(30)Co_(30)Ni_(10)高熵合金相比,屈服强度和抗拉强度分别提高了633 MPa和296 MPa.强化机理为固溶强化、细晶强化和位错强化共同作用.
1%nitrogen was added to Cr_(20)Mn_(10)Fe_(30)Co_(30)Ni_(10)high-entropy alloy during melting to improve the strength of high-entropy alloy in this study.The following processes were homogenization,cold rolling at room temperature and recrystallization.The results show that the heterogeneous microstructure of 600℃ as-annealed Cr_(20)Mn_(10)Fe_(30)Co_(30)Ni_(10)-1N consists of three parts.The first part is finer recrystallized face-centered cubic(FCC)grains with lower dislocation density.The second part is medium-sized recovered FCC grains with medium dislocation density,which have undergone a recovery process.The last part is residual unrecovered microstructure with higher dislocation density.The yield strength increases by 633 MPa,while the ultimate tensile strength increases by 296 MPa,compared to those of fully recrystallized Cr_(20)Mn_(10)Fe_(30)Co_(30)Ni_(10)high-entropy alloy.The strengthening mechanism is the combination of solid solution strengthening,grain refinement strengthening and dislocation strengthening.
作者
张静
成裕吉
杜阳
张艳
刘宁
ZHANG Jing;CHENG Yuji;DU Yang;ZHANG Yan;LIU Ning(Materials Science and Technology,Jiangsu University of Science and Technology,Zhenjiang 212100,China;Jiangsu Yonggang Group Co.Ltd.,Zhangjiagang 215628,China;School of Metallurgy Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,China)
出处
《江苏科技大学学报(自然科学版)》
2025年第4期43-47,共5页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
国家自然科学基金项目(51201072)。
关键词
高熵合金
氮
再结晶
显微组织
力学性能
high-entropy alloy
nitrogen
recrystallization
microstructure
mechanical properties
