Fe对Nb-16Si-22Ti-2Cr-2Al-2Hf合金组织与高温压缩性能影响研究
|
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,原子分数)4种合金。采用XRD对合金相结构分析表明,制备的合金由Nbss相,Nb_3Si相及Nb_5Si_3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Nb_3Si→Nbss+Nb_5Si_3的进行,合金相组成由Nbss+Nb_3Si转变为Nbss+Nb_5Si_3。Nb_3Si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。
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 Nb_3Si and Nb_5Si_3 phase.The addition of Fe promotes the eutectic reaction L→Nbss+Nb_5Si_3,which changes the phases of alloy phases from Nbss+Nb_3Si to Nbss+Nb_5Si_3.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.
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 Nb_3Si and Nb_5Si_3 phase.The addition of Fe promotes the eutectic reaction L→Nbss+Nb_5Si_3,which changes the phases of alloy phases from Nbss+Nb_3Si to Nbss+Nb_5Si_3.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.
引文
[1]Zhao J C,Westbrook J H.MRS Bulletin[J],2003,9:622
[2]Yu J L,Zhang K F,Li Z K.Scripta Materialia[J],2009,61:620
[3]Perepezko J H.Science[J],2009,326:1068
[4]Qu Shiyu(曲士昱).Thesis for Doctorate(博士论文)[D].Beijing:AVIC Beijing Institute of Aeronautical Materials,2002
[5]Bewlay B,Jackson M,Zhao J C et al.Metallurgical and Material Transaction A[J],2003,34A:2044
[6]Bewlay B,Jackson M,Lipsitt H.Journal of Phase Equilibria and Diffusion[J],1997,18(3):264
[7]Bewlay B,Jackson M,Bishop R.Journal of Phase Equilibria and Diffusion[J],1998,19(6):577
[8]Bewlay B P,Jackson M R,Zhao J C.MRS Bulletin[J],2003,28(9):646
[9]Gao Limei(高丽梅),Guo Xiping(郭喜平).Thesis for Master Degree(硕士论文)[D].Xi’an:Northwestern Polytechnical University,2005
[10]Gai Jingru(盖京茹),Jia Lina(贾丽娜),Li Xiaojian(李小溅).Acta Materiae Compositae Sinica(复合材料学报)[J],2011,28(4):117
[11]Zelenitsas K,Tsakiropoulos P.Materials Science&Engineering A[J],2006,416:269
[12]Kashyap S,Tiwary C S,Chattopadhyay K.Intermetallics[J],2011,19:1943
[13]Chen Y,Shang J X,Zhang Y.Journal of Physics:Condensed Matter[J],2007,19(1):016 215
[14]Li Wei(李伟),Yang Haibo(杨海波),Shan Aidang(单爱党)et al.Journal of Materials Engineering(材料工程)[J],2004,4:31
[15]Zheng Peng(郑鹏),Sha Jiangbo(沙江波),Liu Dongming(刘东明)et al.Acta Aeronautica et Astronautica Sinica(航空学报)[J],2008,29(1):227
[16]Chan K S.Materials Science&Engineering A[J],2002,329-331A:513
[17]Tang Liang,Ma Chaoli,Zhao Xinqing.Rare Metal Materials and Engineering[J],2009,38(S3):8
[18]Kim W Y,Yeo I D,Ra T Y.Journal of Alloys and Compounds[J],2004,364:186
[19]Velliow N,Tsakiropoulos P.Intermetallics[J],2010,18:1729
[20]Velliow N,Tsakiropoulos P.Intermetallics[J],2007,15:1529
[21]Velliow N,Tsakiropoulos P.Intermetallics[J],2007,15:1518
[22]Yu Jiliang(喻吉良),Li Zhongkun(李中奎),Zhang Kaifeng(张凯锋).Acta Metallurgica Sinica(金属学报)[J],2008,44(8):933
[23]Yu Jiliang(喻吉良),Zhang Kaifeng(张凯锋).Thesis for Doctorate(博士论文)[D].Harbin:Harbin Institute of Technology,2008
[24]Yu Jiliang(喻吉良),Li Zhongkun(李中奎),Zhang Kaifeng(张凯锋).Failure Analysis and Prevention(失效分析与预防)[J],2010,5(4):231
[25]Yu Jiliang(喻吉良),Zhang Kaifeng(张凯锋),Li Zhongkun(李中奎).Materials Science and Engineering[J],2010,527:5230
[26]Yu J L,Zhang K F.Scripta Materialia[J],2008,59:714
[27]Jia Lina(贾丽娜),Li Xiaojian(李小溅),Sha Jiangbo(沙江波).Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2010,39(8):1475
[28]Jia Lina(贾丽娜),Guo Xiping(郭喜平).Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2008,37(5):878
[29]Jia Lina(贾丽娜),Gai Jingru(盖京茹),Zheng Lijing(郑立静)Acta Materiae Compositae Sinica(复合材料学报)[J],2011,28(5):133
[30]Jia Lina(贾丽娜),Gao Ming(高明).Acta Metallurgica Sinica(金属学报)[J],2011,47(1):88
[2]Yu J L,Zhang K F,Li Z K.Scripta Materialia[J],2009,61:620
[3]Perepezko J H.Science[J],2009,326:1068
[4]Qu Shiyu(曲士昱).Thesis for Doctorate(博士论文)[D].Beijing:AVIC Beijing Institute of Aeronautical Materials,2002
[5]Bewlay B,Jackson M,Zhao J C et al.Metallurgical and Material Transaction A[J],2003,34A:2044
[6]Bewlay B,Jackson M,Lipsitt H.Journal of Phase Equilibria and Diffusion[J],1997,18(3):264
[7]Bewlay B,Jackson M,Bishop R.Journal of Phase Equilibria and Diffusion[J],1998,19(6):577
[8]Bewlay B P,Jackson M R,Zhao J C.MRS Bulletin[J],2003,28(9):646
[9]Gao Limei(高丽梅),Guo Xiping(郭喜平).Thesis for Master Degree(硕士论文)[D].Xi’an:Northwestern Polytechnical University,2005
[10]Gai Jingru(盖京茹),Jia Lina(贾丽娜),Li Xiaojian(李小溅).Acta Materiae Compositae Sinica(复合材料学报)[J],2011,28(4):117
[11]Zelenitsas K,Tsakiropoulos P.Materials Science&Engineering A[J],2006,416:269
[12]Kashyap S,Tiwary C S,Chattopadhyay K.Intermetallics[J],2011,19:1943
[13]Chen Y,Shang J X,Zhang Y.Journal of Physics:Condensed Matter[J],2007,19(1):016 215
[14]Li Wei(李伟),Yang Haibo(杨海波),Shan Aidang(单爱党)et al.Journal of Materials Engineering(材料工程)[J],2004,4:31
[15]Zheng Peng(郑鹏),Sha Jiangbo(沙江波),Liu Dongming(刘东明)et al.Acta Aeronautica et Astronautica Sinica(航空学报)[J],2008,29(1):227
[16]Chan K S.Materials Science&Engineering A[J],2002,329-331A:513
[17]Tang Liang,Ma Chaoli,Zhao Xinqing.Rare Metal Materials and Engineering[J],2009,38(S3):8
[18]Kim W Y,Yeo I D,Ra T Y.Journal of Alloys and Compounds[J],2004,364:186
[19]Velliow N,Tsakiropoulos P.Intermetallics[J],2010,18:1729
[20]Velliow N,Tsakiropoulos P.Intermetallics[J],2007,15:1529
[21]Velliow N,Tsakiropoulos P.Intermetallics[J],2007,15:1518
[22]Yu Jiliang(喻吉良),Li Zhongkun(李中奎),Zhang Kaifeng(张凯锋).Acta Metallurgica Sinica(金属学报)[J],2008,44(8):933
[23]Yu Jiliang(喻吉良),Zhang Kaifeng(张凯锋).Thesis for Doctorate(博士论文)[D].Harbin:Harbin Institute of Technology,2008
[24]Yu Jiliang(喻吉良),Li Zhongkun(李中奎),Zhang Kaifeng(张凯锋).Failure Analysis and Prevention(失效分析与预防)[J],2010,5(4):231
[25]Yu Jiliang(喻吉良),Zhang Kaifeng(张凯锋),Li Zhongkun(李中奎).Materials Science and Engineering[J],2010,527:5230
[26]Yu J L,Zhang K F.Scripta Materialia[J],2008,59:714
[27]Jia Lina(贾丽娜),Li Xiaojian(李小溅),Sha Jiangbo(沙江波).Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2010,39(8):1475
[28]Jia Lina(贾丽娜),Guo Xiping(郭喜平).Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2008,37(5):878
[29]Jia Lina(贾丽娜),Gai Jingru(盖京茹),Zheng Lijing(郑立静)Acta Materiae Compositae Sinica(复合材料学报)[J],2011,28(5):133
[30]Jia Lina(贾丽娜),Gao Ming(高明).Acta Metallurgica Sinica(金属学报)[J],2011,47(1):88