Details

Autor(en) / Beteiligte

• Qian, Ben Jiang
• Li, An An
• Liang, Fu Shun
• Tian, Su Gui
• Yu, Xing Fu

Titel

Creep Behaviors of a Single Crystal Nickel-Based Superalloy Containing 4.2%Re

Ist Teil von

• Materials science forum, 2011-01, Vol.689, p.276-281

Ort / Verlag

Trans Tech Publications Ltd

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• By the measurement of creep curves and microstructure observation, an investigation has been made into the creep behaviors and microstructure evolution of a single crystal nickel-based superalloy containing 4.2%Re. Results show that the superalloy displays an obvious sensibility on the applied temperatures and stresses in the range of the applied temperatures and stresses. During the initial creep, the cubical g¢ phase in the alloy is transformed into an N-type rafted structure along the direction vertical to the applied stress axis. After crept up to fracture, the rafted g¢ phase in the region near fracture is transformed into a twisted configuration. The dislocation climbing over the rafted g¢ phase is considered to be the main deformation mechanism of the alloy during the steady creep state, and dislocations shear into the rafted g¢ phase is the main deformation mechanism of the alloy in the later stage of creep.