Effect of Phosphorus on Stress Rupture Properties of GH4133 Ni-Base Superalloy

查看全文 作　　者：Wenru SUN+, Shouren GUO, Baiyun TONG, Dezhong LU, Yan XU, Xiaona MENG, Na LI and Zhuangqi HUDepartment of Superallovs, Institute of Metai Research, Chinese Academy of Sciences, Shenyang 110016, China

出　　处：《Journal of Materials Science & Technology》索引2003年第19卷第4期,共5页

基　　金：supported by the National Natural Science Foundation of China(Grant No.50171054);the Natural Science Foundation of Shanxi Province(Grant No.20021002). 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 GH4133alloy. 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. 关键词：镍基合金超耐热合金磷应力疲劳断裂力学性质

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Effect of Phosphorus on Stress Rupture Properties of GH4133 Ni-Base Superalloy

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