欢迎登录材料期刊网

材料期刊网

高级检索

通过对不同Re含量镍基合金进行室温、高温X射线衍射谱线测定及持久性能测定,研究了Re含量及温度对镍基合金中γ、γ'两相晶格错配度及持久寿命的影响规律.结果表明:随Re含量增加,合金中γ、γ'两相的晶格常数增大,两相界面的晶格错配度及错配应力减小,致使蠕变期间合金中γ'相的筏形化速率降低,并可较大幅度地提高合金在高温区间的持久寿命.与γ'有序相比较,无序的γ相原子结合力较弱,且热容较大,致使其有较大的膨胀系数,故随温度提高,合金中两相的晶格错配度绝对值增大.合金中γ、γ'两相的晶格常数、热膨胀系数随温度变化服从指数规律;在试验的温度范围内,提出的数学表达式在高温区间,可较好地模拟γ、γ'两相的膨胀特性.

参考文献

[1] Glatzel U;Feller-Kniepmeier.Calculation of internal stresses in the γ、γ' microstructure of a nickel-base superalloy with high volume fraction of γ'-phase[J].Scripta Metallurgica,1989(23):1839-1844.
[2] Diologent F;Caron P;Jacques A et al.The γ'、γ mismatch in Ni based superalloys:In situ measurements during creep test[J].Nuclear Instruments and Methods in Physics Research B:Beam Interaction with Materials & Atoms,2002,200:346-351.
[3] Gilles R;Ukherji D;Tobbens D et al.Neutron X-ray and electron diffraction measurements for the determination of γ'、γ lattice misfit in Ni-base superalloys[J].Applied Physics A:Materials Science and Processing,2002,7:1446-1448.
[4] 李唐;田素贵;王明罡.Re对单晶镍基合金中γ'、γ两相晶格常数及错配度的影响[A].北京:冶金工业出版社,2007:478-481.
[5] 孟凡来,田素贵,王明罡,于兴福,杜洪强,水丽,胡壮麒.镍基单晶合金组织演化及对晶格错配度的影响[J].材料研究学报,2007(03):225-229.
[6] Erickson G L.The development of CMSX-10,a third generation SX casting superalloy[A].Korea,1995:18-22.
[7] 李嘉荣,唐定中,刘世忠,劳日玲,吴仲棠.Re对一种单晶高温合金蠕变断裂寿命的影响[J].材料工程,1999(03):3-7.
[8] 骆宇时,李嘉荣,刘世忠,孙凤礼,曹春晓.Re对单晶高温合金持久性能的强化作用[J].材料工程,2005(08):10-14.
[9] Gabb T P;Draper S L .The role of interfacial dislocation networks in high temperature creep of superalloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1989,118:59-69.
[10] S. G. Tian;C. R. Chen;J. H. Zhang;H. C. Yang;X. Wu;Y. B. Xu;Z. Q. Hu .Evolution and analysis of γ' rafting during creep of single crystal nickel base superalloy[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2001(6):736-744.
[11] Glatzel U M;Feller-Kniepmeier.Calculations of internal stresses in the γ/γ' microstruture of a nickel-base superalloy with high volume fraction of γ'-phase[J].Acripta Metallurgica,1989:1840-1844.
[12] Lu Chao;Zhou Tie;Zheng Rui-lun .The expansion coefficient and elastic modulus of crystal with FCC structure[J].Journal of Southwest China Normal University(Natual Science),2005,5:12-15.
[13] Blavette D .Role of the atom probe in the study of nickel-based superalloys[J].Materials Characterization,2000,44:133-137.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%