|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Coal-Based Power
||C-8: The Effect of W and Mo Addition on the Microstructure and Mechanical Properties of GY200 Ni-based Alloy
||Zhihua Gong, Gang Yang
|On-Site Speaker (Planned)
In this investigation, six GY200 alloys with different tungsten and molybdenum contents were designed through composition optimization. SEM, TEM and chemical analysis method were carried out to illustrate the effect of W and Mo addition on the microstructure and mechanical properties of GY200 alloy. The results show that optimized W and Mo addition in GY200 alloy would lead to higher strength and a slight decrease of ductility. For alloys separately added W (Mo free), higher W content results in higher contents of MC and γ’ precipitates, while the peak value of M<sub>23</sub>C<sub>6</sub> content were found in alloy containing 4% W. Moreover, the addition of 2% Mo in GY200 alloys exerts favorable influence on to the precipitation behavior of MC and γ’. However, increased W addition from 2~4% brought about a sharp decrease of M<sub>23</sub>C<sub>6</sub> content, while the content raised again for alloy containing 8% W.
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