Influence of Co, W and Ti on the Stress-rupture Lives of a Single Crystal Nickel-base Superalloy

材料科学技术（英文）, 2006, 22(2): 169-172.

^1, , ^2, , ^3, , ^4, , ^5, , ^6, , ^7,

1.Department of Superalloy, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

2.Department of Superalloy, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

3.Department of Superalloy, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

4.Department of Superalloy, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

5.Department of Superalloy, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

6.Department of Superalloy, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

7.Department of Superalloy, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

基金项目: the National Natural Science Foundation of China(50474058)

Influence of Co, W and Ti on the Stress-rupture Lives of a Single Crystal Nickel-base Superalloy

Keywords： Nickel-base single crystal superalloy

The influence of Co, W and Ti on stress-rupture lives of a Ni-Cr-Al-Mo-Ta-Co-W-Ti single crystal nickel-base superalloy has been investigated using a L9 (34) orthogonal array design (OAD) by statistical analysis. At a selected composition range, Ti content was the most important factor to the effect of the stress-rupture lives and then followed by Co content. W content had the minimum effect on stress-rupture lives. The optimal alloy should contain 10 wt pct Co, 8 wt pct W and zero Ti. The optimized alloy also had good microstructural stability during thermal exposure at 870℃ for 500 h.

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Influence of Co, W and Ti on the Stress-rupture Lives of a Single Crystal Nickel-base Superalloy

参考文献