对比研究了不含Ru的USTB-F7及添加2.5 wt％ Ru的USTB-F8两种镍基单晶高温合金的组织稳定性和持久性能.标准热处理与1100℃长期热暴露组织研究表明:合金USTB-F7中γ′相形貌介于球形和立方形之间,属中间态形貌；热暴露2000 h后,其形貌仍保持稳定,仅发生粗化而未发生筏排化.Ru的添加使Re元素在γ/γ′中的分配比增大,提高了合金USTB-F8的γ/γ′点阵错配度和γ'相的立方度,从而加速了长期热暴露过程中的筏排化进程,经2000 h热暴露发生了明显的筏排化现象.同时,合金USTB-F7热暴露700 h后在枝晶干处析出了富集Re、W和Cr元素的TCP相,Ru的加入有效地抑制了TCP相的析出,合金USTB-F8直至2000 h仍未析出TCP相.1100℃/140MPa持久性能测试表明,Ru显著提高合金的持久寿命,这与Ru增加合金中的y相体积分数和γ/γ′点阵错配度,促进筏排组织的形成,并减小时效组织中的γ通道宽度有关.
参考文献
| [1] | 胡壮麒,刘丽荣,金涛,孙晓峰.镍基单晶高温合金的发展[J].航空发动机,2005(03):1-7. |
| [2] | Tresa M.Pollock;Sammy Tin .Nickel-Based Superalloys for Advanced Turbine Engines:Chemistry,Microstructure,and Properties[J].Journal of Propulsion & Power,2006(2):361-374. |
| [3] | Feng Q;Nandy T K;Tin S et al.[J].Acta Materialia,2003,51(01):269. |
| [4] | O'Hara K S;Walston W S;Ross E W et al.[P].US Patent:5482789,1996. |
| [5] | Walston S;Cetel A;MacKay R;Green K A.Superalloys 2004[M].Champion,PA:TMS,2004:15. |
| [6] | Sato A;Harada H;Yokokawa T;Murakumo T;Koizumi Y;Kobayashi T;Imai H .The effects of ruthenium on the phase stability of fourth generation Ni-base single crystal superalloys[J].Scripta materialia,2006(9):1679-1684. |
| [7] | Hobbs R A;Zhang L;Rae C M F et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2008,39(05):1014. |
| [8] | Superalloys 2004[M].Champion,PA:TMS,2004:677. |
| [9] | Zhang J X;Murakumo T;Harada H;Green K A.Superalloys 2004[M].Champion,PA:TMS,2004:189. |
| [10] | Tin S;Zhang L;Hobbs R;Reed R C.Superalloys 2008[M].Champion,PA:TMS,2008:81. |
| [11] | Zheng L;Li S;Xiao C et al.[J].Key Engineering Materials,2007,353-358:507. |
| [12] | R. C. Reed;A. C. Yeh;S. Tin;S. S. Babu;M. K. Miller .Identification of the partitioning characteristics of ruthenium in single crystal superalloys using atom probe tomography[J].Scripta materialia,2004(4):327-331. |
| [13] | A. Volek;F. Pyczak;R. F. Singer .Partitioning of Re Between gamma and gamma' Phase in Nickel-Base Superalloys[J].Scripta materialia,2005(2):141-145. |
| [14] | Feng Q;Carroll L J;Pollock T M .[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2006,37(06):1949. |
| [15] | Harada H;Zhao J-C eds.Materials Design Approaches and Experiences[M].Warrendale,PA:TMS,2001:29. |
| [16] | Feng Q;Nandy T K;Pollock T M .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2004,373(1-2):239. |
| [17] | Feng Q;Nandy T K;Rowland L J;Green K A.Superalloys 2004[M].Champion,PA:TMS,2004:769. |
| [18] | 陈晶阳,赵宾,冯强,曹腊梅,孙祖庆.Ru和Cr对镍基单晶高温合金γ/γ'热处理组织演变的影响[J].金属学报,2010(08):897-906. |
| [19] | M. FAEHRMANN;P. FRATZL;O. PARIS;E. FAEHRMANN;WILLIAM C. JOHNSON .INFLUENCE OF COHERENCY STRESS ON MICROSTRUCTURAL EVOLUTION IN MODEL Ni-Al-Mo ALLOYS[J].Acta Metallurgica et Materialia,1995(3):1007-1022. |
| [20] | 刘丽荣,金涛,孙晓峰,管恒荣,胡壮麒.Al、Ti和Ta含量对镍基单晶高温合金时效组织的影响[J].稀有金属材料与工程,2008(07):1253-1256. |
| [21] | 任英磊,金涛,管恒荣,胡壮麒.高温长期时效对镍基单晶高温合金γ′相形貌的影响[J].机械工程材料,2004(03):10-12,15. |
| [22] | 胡聘聘,陈晶阳,冯强,陈艳辉,曹腊梅,李相辉.Mo对镍基单晶高温合金组织及持久性能的影响[J].中国有色金属学报,2011(02):332-340. |
| [23] | T. Murakumo;T. Kobayashi;Y. Koizumi .Creep behaviour of Ni-base single-crystal superalloys with various gamma'volume fraction[J].Acta materialia,2004(12):3737-3744. |
| [24] | Carroll L J;Feng Q;Pollock T M .[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2008,39(06):1290. |
| [25] | Carroll L J;Feng Q;Mansfield J F et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2006,37(10):2927. |
| [26] | Rowland L J;Feng Q;Pollock T M;Green K A.Superalloys 2004[M].Champion,PA:TMS,2004:697. |
| [27] | Chen J Y;Zhao B;Feng Q.[A].San Francisco,CA:TMS |
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：
-
10%
-
20%
-
30%
-
40%
-
50%