Orientation Dependence of Stress Rupture Properties of a Ni-based Single Crystal Superalloy at 760℃

材料科学技术（英）, 2012, 28(3): 229-233.

Orientation Dependence of Stress Rupture Properties of a Ni-based Single Crystal Superalloy at 760℃

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1.Superalloys Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academyof Sciences, 72 Wenhua Road, Shenyang 110016, China

2.Superalloys Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academyof Sciences, 72 Wenhua Road, Shenyang 110016, China

3.Superalloys Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academyof Sciences, 72 Wenhua Road, Shenyang 110016, China

4.Superalloys Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academyof Sciences, 72 Wenhua Road, Shenyang 110016, China

基金项目: the National Natural Science Foundation of China(Grant . 50931004,51171193,50901079) sponsored by the National Basic Research Program of China(Grant 2010CB631201)

关键词：镍基单晶高温合金 , 取向依赖性 , 断裂性能 , 应力 , 堆垛层错 , 蠕变断裂 , 断裂寿命 , 变形控制

Orientation Dependence of Stress Rupture Properties of a Ni-based Single Crystal Superalloy at 760℃

Keywords： Single crystal superalloy Stress rupture Orientation ,

The orientation dependence of creep rupture lives of a single crystal superalloy at 760℃/760 MPa was investigated.The orientations of the specimens tested were about 30°away from [001].The results showed that specimens with orientations on the [001]-[011] boundary had the longest rupture life.The deformation of these specimen were controlled by a/2〈110〉 slip and a few stacking faults with two orientations were observed.On the other hand,specimens with orientations near the [001]-[011] boundary or on the [001]-[111] boundary showed short rupture lives,and stacking faults with single orientation were observed in these specimens.The rupture properties and the deformation mechanisms were discussed based on the dislocation pattern and the calculated Schmid factors for different specimens.

参考文献

[1]	S. S. K. Gunturi;D. W. MacLachlan;D. M. Knowles .Anisotropic creep in CMSX-4 in orientations distant from <001>[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):289-298.
[2]	N. MATAN;D.C. COX;P. CARTER .CREEP OF CMSX-4 SUPERALLOY SINGLE CRYSTALS: EFFECTS OF MISORIENTATION AND TEMPERATURE[J].Acta materialia,1999(5):1549-1563.

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Orientation Dependence of Stress Rupture Properties of a Ni-based Single Crystal Superalloy at 760℃

Orientation Dependence of Stress Rupture Properties of a Ni-based Single Crystal Superalloy at 760℃

参考文献