V元素对高熵合金FeCrNiMnVx相结构的影响
Effect of V doping on the phase structure of FeCrNiMnVx
王俊 1余韵 1徐茂炎 1李强 2王江 2张毅3
作者信息
- 1. 攀枝花钢城集团有限公司,攀枝花 617000
- 2. 攀枝花学院钒钛学院,攀枝花 617000
- 3. 攀枝花学院生物与化学工程学院,攀枝花 617000
- 折叠
摘要
本文运用CALPHAD方法,建立了高熵合金FeCrNiMnVx(x=0.0～1.0)的热力学计算模型,对V掺杂的高熵合金FeCrNiMnVx相成分和强度进行了讨论分析.研究发现,当x=0.0时,室温下FeCrNiMn由FCC-A1和SIGMA两相组成.在800～890 K温度区域,该体系发生了有序-无序SIGMA->BCC-A2+FCC-A1转变.当x增加到0.2时,室温下体系由SIGMA和FCC#2两相组成,并在390～435 K发生FCC#2+SIGMA->FCC-A1转变.FeCrNiMnV0.4的相结构与FeCrNiMnV0.6类似,而FeCrNiMnV0.8在300 K时共有三个相,分别为SIGMA#2、SIGMA和FCC#2相.当V增加到1.0时,室温下FeCrNiMnV 由BCC-A2、SIGMA、CR3MN5和FCC#2四种相组成,并在390～400 K发生SIGMA+CR3MN5->BCC-A2和FCC#2+CR3MN5->FCC-A1转变.V元素的增加对于高熵合金FeCrNiMnVx的抗拉强度和屈服强度具有明显的促进作用,这归因于其导致的BCC相成分的增加和晶粒的细化作用.
Abstract
This study utilized the CALPHAD method to establish a thermodynamic calculation model for high-entropy alloy FeCrNiMnVx(x=0.0～1.0)and conducted in-depth discussions and analysis on the phase composition and strength of FeCrNiMnVx with V doping.The research findings revealed that when x=0.0,FeCrNiMn is primarily composed of face-centered cubic structure(FCC-A1)and SIGMA phase at room temperature.Within the temperature range of 800～890 K,the system undergoes a transition from or-dered to disordered phase,shifting from SIGMA phase to a state containing body-centered cubic(BCC-A2)and face-centered cubic(FCC-A1)phases.As x increases to 0.2,the FeCrNiMnVx system at room tempera-ture is mainly composed of SIGMA and FCC#2 phases,and experiences a phase transition from FCC#2+SIGMA to FCC-A1 in the temperature range of 390～435 K.Compared to this,the phase structure of Fe-CrNiMnV0.4 is similar to FeCrNiMnV0.6,while FeCrNiMnV0.8 exhibits three phases at 300 K:SIGMA#2,SIGMA,and FCC#2.When V element is increased to 1.0,FeCrNiMnVx at room temperature consists of four phases,namely BCC-A2,SIGMA,CR3MN5,and FCC#2,with phase transitions of SIGMA+CR3MN5 to BCC-A2 and FCC#2+CR3MN5 to FCC-A1 in the temperature range of 390～400 K.The addition of V element significantly enhances the tensile strength and yield strength of FeCrNiMnVx,primarily due to the increase in BCC phase composition and grain refinement.
关键词
CALPHAD/高熵合金/FeCrNiMnVKey words
CALPHAD/High entropy alloy/FeCrNiMnV引用本文复制引用
基金项目
四川省科技计划重点项目(2020YFS0512)
钢城集团-攀枝花学院科研协同创新平台技术研发项目(HX2023088)
出版年
2024
国家科技期刊平台
NSTL
万方数据