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

J Mater Sci Technol ›› 2012, Vol. 28 ›› Issue (3): 229-233.

• High Temperature Structural Materials • Previous Articles Next Articles

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

Shaohua Zhang, Dong Wang, Jian Zhang, Langhong Lou

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

Received:2011-02-22 Revised:2011-04-18 Online:2012-03-31 Published:2012-03-31
Contact: Shao-hua Zhang
Supported by:
the National Basic Research Program of China (Grant No. 2010CB631201) and the National Natural Science Foundation of China (Grant Nos. 50931004, 51171193, 50901079)

Abstract

Abstract: The orientation dependence of creep rupture lives of a single crystal superalloy at 760^oC/760 MPa was investigated. The orientations of the specimens tested were about 30^o 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]- [¹111] 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..

Key words: Single crystal superalloy, Stress rupture, Orientation

CLC Number:

TG146

Shaohua Zhang, Dong Wang, Jian Zhang, Langhong Lou. Orientation Dependence of Stress Rupture Properties of a Ni-based Single Crystal Superalloy at 760^oC[J]. J Mater Sci Technol, 2012, 28(3): 229-233.

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

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