采用光学显微镜、扫描电镜和透射电镜研究了固溶温度对定向凝固DZ951镍基高温合金组织和持久性能的影响.结果表明:合金经固溶处理后,枝晶偏析降低,合金强度增加.碳化物由铸态时的骨架状变成块状,呈不连续状分布在晶界,对裂纹的萌生和扩展都有抑制作用.γ′相经固溶处理后,尺寸变小,分布更加均匀.合金在1100℃/60MPa的持久性能得到提高.在1300℃固溶处理时,合金元素分布更加均匀,γ′相体积分数增加,使DZ951合金具有较高的持久寿命.
参考文献
| [1] | SIMS C T;STOLOFF N S;HAGREL W C.Superalloys Ⅱ[M].New York:John Wiley and Sons,Inc,1987:3-42. |
| [2] | SAFARI J;NATEGH S .On the heat treatment of Rene-80 nickel-base superalloy[J].Journal of Materials Processing Technology,2006,176:240-250. |
| [3] | MONAJATI H;JAHAZI M;BAHRAMI R et al.The influence of heat treatment conditions on γ′ characteristics in Udimet 720[J].Materials Science and Engineering A,2004,373(1-2):286-293. |
| [4] | BALADAN A .Review progress in Ostwald ripening theories and their applications to the γ′-precipitated in nickel-base superalloy[J].Journal of Materials Science,2002,37:2379-2405. |
| [5] | BARRY M;MARTIN J W .The control of slip distribution by duplex dispersions of γ′ phase in a nickel-based superalloy[J].Zeitschrift Fur Metallkunde,1981,72(08):538-542. |
| [6] | Suwardie JH.;Artiaga R.;Mier JL. .Thermal characterization of a Ni-based superalloy[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2002(special issue si):295-298. |
| [7] | MILLER M K;BABU S S;VITEK J M .Stability of γ′ precipitates in a PWA1480 alloy[J].INTERMETALLICS,2007,15:757-766. |
| [8] | P. C Xia;J. J. Yu;X. F. Sun;H. R. Guan;Z. Q. Hu .Influence of heat treatment on the microstructure and stress rupture property of DZ951 alloy[J].Journal of Materials Processing Technology,2007(1/3):315-322. |
| [9] | L.Z. He;Q. Zheng;X.F Sun;H.R. Guan;Z.Q. Hu;A.K. Tieu;C. Lu;H.T. Zhu .Effect of heat treatment on microstructures and tensile properties of Ni-base superalloy M963[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):128-136. |
| [10] | G. Appa Rao;Mahendra Kumara;M. Srinivas .Effect of standard heat treatment on the microstructure and mechanical properties of hot isostatically pressed superalloy inconel 718[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):114-125. |
| [11] | Jinjiang Yu;Xiaofeng Sun;Nairen Zhao;Tao Jin;Hengrong Guan;Zhuangqi Hu .Effect of heat treatment on microstructure and stress rupture life of DD32 single crystal Ni-base superalloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):420-427. |
| [12] | JACKSON J J;DONACHIE M J;HENRICKS R J et al.The effect of volume fraction of fine γ′ on creep in DS Mar-M200Hf[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1977,8A:1615-1620. |
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%