褚楚、、,徐严谨、、,韩宝帅、、,孟宪宇,骆良顺,侯红亮、、,苏彦庆,郭景杰,傅恒志.Fe对Nb-16Si-22Ti-2Cr-2Al-2Hf合金组织与高温压缩性能影响研究[J].稀有金属材料与工程,2018,47(1):139~145.[Chu Chu,Xu Yanjin,Han Baoshuai,Meng Xianyu,Luo Liangshun,Hou Hongliang,Su Yaning,Guo Jingjie,Fu Hengzhi.Effects of Fe on Microstructures and High-Temperature Compressive Mechanical Properties of Nb-16Si-22Ti-2Cr-2Al-2Hf Based Alloy[J].Rare Metal Materials and Engineering,2018,47(1):139~145.]
Fe对Nb-16Si-22Ti-2Cr-2Al-2Hf合金组织与高温压缩性能影响研究
投稿时间:2016-11-07  修订日期:2016-12-14
中文关键词:  Nb-Si合金  Nbss  硅化物  高温压缩  力学性能
基金项目:国家自然科学基金资助(项目号5140051854, 51425402, 51331005)
中文摘要:
      采用真空非自耗电弧炉制备了不同Fe含量的Nb-16Si-22Ti-2Cr-2Al-2Hf-xFe(x=0,1,2,3,原子百分数)四种合金。采用XRD对合金相结构分析表明,制备的合金由Nbss相,Nb3Si相及Nb5Si3相组成。微观组织分析发现,随着Fe元素含量的增加,促进共析反应Nb3Si→Nbss+Nb5Si3的进行,合金相组成由Nbss+Nb3Si转变为Nbss+Nb5Si3。Nb3Si组织由连续变成分散的块状,体积分数减小,Nbss相由树枝晶状转变为等轴晶状,平均晶粒大小约5μm,体积分数有所增加。采用Gleeble-1500热模拟机对合金进行高温压缩实验,发现随着Fe元素含量的增加,压缩温度的升高及应变速率的降低,合金压缩开裂倾向减小,应力峰值降低,变形能力增加。Fe元素的添加令Nb-Si基超高温合金具有更好的高温塑性变形能力,对改善Nb-Si合金的热加工性能具有重要的意义。
Effects of Fe on Microstructures and High-Temperature Compressive Mechanical Properties of Nb-16Si-22Ti-2Cr-2Al-2Hf Based Alloy
英文关键词:Nb-Si  based alloy,Nbss,Silicide  phase,High  temperature compression,Mechanical  properties
英文摘要:
      Four kinds of multiphase refractory Nb-16Si-22Ti-2Cr-2Al-2Hf-xFe(x=0,1,2,3)alloys were prepared by vacuum arc melting. XRD analysis reveals that the composites consist of Nb solid solution(Nbss), intermetallics Nb3Si and Nb5Si3 phase. The addition of Fe promotes the eutectic reaction L→Nbss+Nb5Si3, which changes the phases of alloy phases from Nbss + Nb3Si to Nbss + Nb5Si3.The volume fraction of ductile phase Nbss increases with increasing of Fe addition, leading to the reduction of compressive strength. Meanwhile, temperature and strain rate also have important influence on compressive strength of the alloys. The addition of Fe element makes Nb-Si based superalloy have better high temperature plastic deformation ability, which is of great significance to improve the hot workability of Nb-Si alloy.
作者单位E-mail
褚楚、、 北京航空制造工程研究所
塑性成形技术航空科技重点实验室 
hit100810107@163.com 
徐严谨、、 北京航空制造工程研究所
塑性成形技术航空科技重点实验室 
 
韩宝帅、、 北京航空制造工程研究所
塑性成形技术航空科技重点实验室 
 
孟宪宇 哈尔滨工业大学  
骆良顺 哈尔滨工业大学  
侯红亮、、 北京航空制造工程研究所
塑性成形技术航空科技重点实验室 
 
苏彦庆 哈尔滨工业大学  
郭景杰 哈尔滨工业大学  
傅恒志 哈尔滨工业大学  
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