| Effect of Phosphorus on Stress Rupture Properties of GH4133 Ni—Base Superalloy |
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| 作者姓名： | WenruSUN ShourenGUO BaiyunTONG DezhongLU YanXU XiaonaMENG NaLI ZhuangqiHU |
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| 作者单位： | DepartmentofSuperalloys,InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016,China |
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| 摘 要： | The effect of phosphorus on the stress rupture property of GH4133 alloy has been investigated and is compared with that of IN718 alloy. The GH4133 alloy is crept by dislocation movement. Phosphorus has a tendency to prolong the rupture life of some wrought superalloys by inhibiting the dislocation movement. If the phosphorus addition is too high, its effect on impairing the grain boundary cohesion overwhelms that on inhibiting the dislocation movement,and the life of the GH4133 alloy can be shortened. The two functions of inhibiting the dislocation movement and impairing the grain boundary cohesion determine that the optimum phosphorus content in the GH4133 alloy is around 0.011 wt pct. Phosphorus exhibits a greater effect on prolonging the rupture life of IN718 alloy than that of GH4133 alloy. The two alloys are crept by different mechanisms. The intergranular phosphorus-bearing phase is precipitated in the IN718 alloy, while not in the GH4133 alloy. The precipitation of the phosphorus bearing phase can balance the phosphorus segregation at the grain boundaries and allows a more remarkable effect of phosphorus on extending the rupture life of IN718 alloy.
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| 关 键 词： | 镍基合金 超耐热合金 磷 应力 疲劳断裂 力学性质 |
Effect of Phosphorus on Stress Rupture Properties of GH4133 Ni-Base Superalloy |
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| WenruSUN ShourenGUO BaiyunTONG DezhongLU YanXU XiaonaMENG NaLI ZhuangqiHU.Effect of Phosphorus on Stress Rupture Properties of GH4133 Ni-Base Superalloy[J].Journal of Materials Science & Technology,2003,19(4):289-291. |
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| Authors: | Wenru SUN Shouren GUO Baiyun TONG Dezhong LU Yan XU Xiaona MENG Na LI Zhuangqi HU |
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| Affiliation: | Department of Superalloys, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The effect of phosphorus on the stress rupture property of GH4133 alloy has been investigated and is compared with that of IN718 alloy. The GH4133 alloy is crept by dislocation movement. Phosphorus has a tendency to prolong the rupture life of some wrought superalloys by inhibiting the dislocation movement. If the phosphorus addition is too high, its effect on impairing the grain boundary cohesion overwhelms that on inhibiting the dislocation movement, and the life of the GH4133 alloy can be shortened. The two functions of inhibiting the dislocation movement and impairing the grain boundary cohesion determine that the optimum phosphorus content in the GH4133 alloy is around 0.011 wt pet. Phosphorus exhibits a greater effect on prolonging the rupture life of IN718 alloy than that of GH4133 alloy. The two alloys are crept by different mechanisms. The intergranular phosphorus-bearing phase is precipitated in the IN718 alloy, while not in the GH4133 alloy. The precipitation of the phosphorus bearing phase can balance the phosphorus segregation at the grain boundaries and allows a more remarkable effect of phosphorus on extending the rupture life of IN718 alloy. |
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| Keywords: | Phosphorus Alloy GH4133 Stress Rupture property |
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