张建飞,郝文纬,徐鹏飞,董悦雷,张宇昊.电弧熔炼态NiAl-39V共晶合金的组织及力学性能[J].稀有金属材料与工程,2019,48(5):1523~1528.[ZHANG Jianfei,HAO Wenwei,XU Pengfei,Dong Yuelei,ZHANG Yuhao.Microstructure and performance of NiAl-39V Eutectic Alloy prepared by Arc melting[J].Rare Metal Materials and Engineering,2019,48(5):1523~1528.]
电弧熔炼态NiAl-39V共晶合金的组织及力学性能
投稿时间:2018-04-02  修订日期:2018-04-11
中文关键词:  共晶  断裂韧性  高温强度  本构方程
基金项目:国家自然科学(No.51564041);内蒙古自然科学(No.2014MS0518);内蒙古科技大学产学研培育(No.PY201509);内蒙古科技大学材冶学院青年人才项目(No.2014CY012)
中文摘要:
      本文采用真空非自耗电弧熔炼制备了Ni-30.5Al-39V(at%)合金,利用光学显微镜(OM),X射线衍射(XRD),扫描电镜(SEM)分析了合金不同凝固位置处的相组成和组织形态,结果表明Ni-30.5Al-39V(at%)的凝固组织由NiAl+V片层共晶组成。通过断裂韧性和高温压缩的测试,结果表明NiAl-39V合金的断裂韧性是NiAl合金的三倍,裂纹偏转和裂纹键合是其主要韧化机理。高温强度提升约2倍左右,复相强化和固溶强化是高温强度提升的主要原因。最后,基于Arrhenius模型构建NiAl-39V合金本构关系为ε = 5.398×[sinh(0.037128σ)]2.3exp(-109.95×103/RT),其激活能为109.95 kJ?mol-1
Microstructure and performance of NiAl-39V Eutectic Alloy prepared by Arc melting
英文关键词:Eutectics  Room temperature fracture toughness  High temperature strength  Constitutive equation
英文摘要:
      SNi-30.5Al-39V (at%) alloy is prepared by vacuum non-consumable arc meltingSin this paper.The phase composition and morphology of the alloy at different solidification positions were analyzed by optical microscopy (OM), X-ray diffraction (XRD) and scanning electron microscopy (SEM).And the results show that the solidification structure of Ni-30.5Al-39V(at%) is composed of NiAl+V sheet eutectic.Through the test of fracture toughness and high temperature compression, the results show that the fracture toughness of NiAl-39V alloy is three times that of NiAl alloy, and crack deflection and crack bonding are the main toughening mechanisms.Finally, based on the Arrhenius model, the constitutive relation of NiAl-39V alloy was constructed as ε = 5.398×[sinh(0.037128σ)]2.3exp(-109.95×103/RT) and the activation energy was 109.95 kJ?mol-1. Keywords: Eutectics; Room temperature fracture toughness; High temperature strength; Constitutive equation
作者单位E-mail
张建飞 内蒙古科技大学材料与冶金学院 zhangjianfei_vip@163.com 
郝文纬 内蒙古科技大学材料与冶金学院  
徐鹏飞 内蒙古科技大学材料与冶金学院  
董悦雷 内蒙古科技大学材料与冶金学院  
张宇昊 内蒙古科技大学材料与冶金学院  
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