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| Effect of Secondary Orientation on Thermal Fatigue Behavior of a Nickel-base Single Crystal Superalloy DD33 |
Li WANG( ),Zhongjiao ZHOU,Weiguo JIANG,Di WANG,Jian SHEN,Langhong LOU |
| Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Cite this article:
Li WANG,Zhongjiao ZHOU,Weiguo JIANG,Di WANG,Jian SHEN,Langhong LOU. Effect of Secondary Orientation on Thermal Fatigue Behavior of a Nickel-base Single Crystal Superalloy DD33. Chinese Journal of Materials Research, 2014, 28(9): 663-667.
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Abstract The effect of secondary orientation on thermal fatigue behavior of a third generation nickel-based single crystal superalloy DD33 was investigated. Samples with different secondary orientations were machined along (100) and (110) plane, respectively, and thermal fatigue test was performed cyclicly between room temperature and 1100oC. It was found that different initiation sites and propagation orientations of the thermal fatigue cracks were observed in samples with different secondary orientations. In samples with secondary orientation of [100], thermal cracks initiated at the edge of the holes along a direction with 45o incline to the directional solidification (DS) direction and propagated along also the derection with 45o incline to the DS direction. While in samples with secondary orientation of [110], thermal cracks initiated at the edge of the holes vertical to the DS direction and propagated along the DS direction. In general, samples with secondary orientation of [100] exhibited better thermal fatigue properties than that of [110] samples.
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Received: 26 March 2014
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| Fund: *Supported by National Natural Science Foundation of China No.51201164, National Basic Research Program of China No.2010CB631201 and National High Technology Research and Development Program of China No. 2012AA03A511. |
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