| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1573550 | Materials Science and Engineering: A | 2016 | 10 Pages |
Abstract
Effect of residual stresses on creep behavior was investigated using designed compact tension specimens in 2.25Cr-1.6W steel before and after heat treatment. The heat treatment was carried out to obtain partial austenitization microstructure and to cause zigzag configuration of grain boundaries. Residual stresses were generated ahead of crack root by loading in compression beyond yield and then unloading. A three-dimensional finite element model was developed to predict the evolution of creep damage and residual stress within the specimens during creep time. The extent of creep crack has also been assessed through destructive examination, providing validation for the creep damage prediction model. Fractal analysis was applied to quantitative determinate the correlation between the grain boundary configuration and creep behavior.
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Authors
Mengjia Xu, Junmei Chen, Hao Lu, Jijin Xu, Chun Yu, Xiao Wei,