电弧熔炼态NiAl-39V共晶合金的组织及力学性能
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摘要
采用真空非自耗电弧熔炼制备了Ni-30.5A1-39V (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合金的凝固组织由NiAl+V片层共晶组成。通过断裂韧性和高温压缩的测试表明:NiAl-39V合金的断裂韧性是NiAl合金的3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)]~(2.3)exp(-109.95×10~3/RT),其激活能为109.95 kJ·mol~(-1)。
Ni-30.5Al-39V(at%) alloy was prepared by vacuum non-consumabie arc melting. The phase composition and morpnoiogy of the alloy at different solidification positions were analysed by optical microscopy(OM), X-ray diffraction(XRD) and scanning electron microscopy(SEM). 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 higher than that of NiAl alloy, and crack deflection and crack bonding are the main toughening mechanisms. Finally, based on the Arrhenius model, the constitutive relationship of NiAl-39 V alloy is constructed as ε=5.398[sinh(0.037128σ)]~(2.3)exp(-109.95×10~3/RT)and the activation energy is 109.95 kJ·mol~(-1).
Ni-30.5Al-39V(at%) alloy was prepared by vacuum non-consumabie arc melting. The phase composition and morpnoiogy of the alloy at different solidification positions were analysed by optical microscopy(OM), X-ray diffraction(XRD) and scanning electron microscopy(SEM). 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 higher than that of NiAl alloy, and crack deflection and crack bonding are the main toughening mechanisms. Finally, based on the Arrhenius model, the constitutive relationship of NiAl-39 V alloy is constructed as ε=5.398[sinh(0.037128σ)]~(2.3)exp(-109.95×10~3/RT)and the activation energy is 109.95 kJ·mol~(-1).
引文
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[2]Wang L,Shen J,Zhang Y P et al.Mater Sci Eng[J],2016,A664:188
[3]Liu Youcheng(刘有成),Gao Lijie(高丽杰).Rare Metals and Cemented Carbides(稀有金属与硬质合金)[J],2013,6(41):33
[4]Guo J T,Wang Z S,Sheng L Y et al.Progress in Natural Science:Materials International[J],2012,5:414
[5]Munroe P R,George M,Baker I et al.Materials Science and Engineering A[J],2002,325(1-2):1
[6]Shang JianFei(张建飞),Shen Jun(沈军),Shang Zhao(商昭)et al.Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2013,42(2):263
[7]Wang L,Shen J.J Alloy Compd[J],2016,663:187
[8]Srdjan Milenkovic,Rubens Caram.Materials Letters[J],2002,55(1-2):126
[9]Srdjan Milenkovic,Rubens Caram.JMPT[J],2003,143-144:629
[10]Zhang J F,Shen J,Shang Z et al.Intermetallics[J],2012,21(1):18
[11]Ma Xuewei(马雪微),Zhang Jianfei(张建飞),Hao Wenwei(郝文纬)et al.Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2018,47(11):3528
[12]Johnson D R,Chen X F,Oliver B F et al.Intermetallics[J],1995,3(2):99
[13]Shang Zhao(商昭).Thesis for Doctorate(博士论文)[D].Xi’an:Northwestern Polytechnical University,2015
[14]Xiong Chuangxian(熊创贤),Zhang Xinming(张新明),Chen Jianmei(陈健美)et al.Transactions of Materials and Heat Treatment(材料热处理学报)[J],2007,28(3):47
[15]Li Runxia(李润霞),Zhang Lijun(张立军),Liu Lanji(刘兰吉)et al.Journal of Plasticity Engineering(塑性工程学报)[J],2015,22(4):133
[16]Long Yongqiang(龙永强),Liu Ping(刘平),Liu Yong(刘勇)et al.Materials Science and Technology(材料科学与工艺)[J],2009(5):713
[17]Ren Weili(任维丽),Guo Jianting(郭建亭),Zhou Jiyang(周继扬).Journal of The Chinese Rare Earth Society(中国稀土学报)[J],2002,20(2):146
[18]Ren Weili(任维丽),Guo Jianting(郭建亭),Zhou Jiyang(周继扬).Journal of Materials Engineering(材料工程)[J],2002,30(1):36
[19]Ren W L,Guo J T,Zhou J Y.Journal of Rare Earths[J],2002,20(4):295
[20]Ren W L,Guo J T,Zhou J Y.Materials Letters[J],2003,57(8):1374
[21]Ren W L,Guo J T,Zhou J Y.Journal of Material Scie nce and Technology[J],2003,19(3):253
[22]Ren W L,Guo J T,Zhou J Y.Mater Sci Technol[J],2004,20(2):163
[23]Chen Xiufan(陈修梵),Peng Xiaoyan(彭小燕),Zhang Huiying(张慧颖)et al.Special-cast and Non-ferrous Alloys(特种铸造及有色合金)[J],2015,35(12):1237
[24]Yu Hui(于辉),Liu Shuaishuai(刘帅帅),Liu Ligang(刘利刚)et al.Chinese Journal of Rare Metals(稀有金属)[J],2017,41(1):1
[25]Sellars C M,Tegart W J.Acta Metallurgica[J],1996,14(9):1136
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