Alternative TitleCreep characteristics of a Ni base single crystal superalloy along 001 direction
水丽; 胡壮麒
Source Publication北京科技大学学报
Other AbstractAn investigation was conducted on the creep behavior and microstructure of a Ni base single crystal superalloy with 001 orientation during creep deformation.The results show that the test samples exhibited a lower steady creep rate and a longer creep life under the higher temperature and stress level.Under the condition of 700℃ and 720MPa TEM observations indicate that 1/2〈110〉 dislocations move in the matrix and react to form the Shockley segments of 1/3〈112〉 dislocations,which cut into the γ' phase and form stacking faults in the precipitates.Under the condition of 900℃ and 450MPa,the primary creep stage does not appear.The morphological evaluation of the γ' phase develops from original cubic to raft microstructure.Multiple slip operates and dislocations shearing the γ' phase is the main deformation mechanism during the creep acceleration stage.Under the condition of 1070℃ and 150MPa,it is found that the γ' phase gradually changes into raft microstructure,hexagonal dislocation networks appear on the γ/γ' interface,and the regular and dense dislocation networks can inhibit dislocations cutting into the γ' phase and enhance the creep resistance.In the later creep stage,the main deformation characteristic is that the γ' phase is sheared by dislocation pairs.
Keyword高温合金 镍合金 单晶体 蠕变 位错
Indexed ByCSCD
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Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
水丽,胡壮麒. 一种001取向镍基单晶高温合金蠕变特征[J]. 北京科技大学学报,2010,000(011):1459-1463.
APA 水丽,&胡壮麒.(2010).一种001取向镍基单晶高温合金蠕变特征.北京科技大学学报,000(011),1459-1463.
MLA 水丽,et al."一种001取向镍基单晶高温合金蠕变特征".北京科技大学学报 000.011(2010):1459-1463.
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