The Deformation Behaviors and Mechanism of the High-Temperature Mechanical Properties of a Ni48W35Co17 Alloy

Investigations of the plastic deformation mechanisms Ni-W-based heavy alloys varying with increasing temperatures are very important for development hot forming processes and applications at elevated temperatures. In this study, continuous variation strength plasticity a novel alloy was investigated. The tensile Ni48W35Co17 sample 600 °C 471 MPa, which 47% lower than that 100 °C. A in an abnormal decrease elongations from 400 to 800 found alloy. elongation rate 19%, 73% microstructural analysis revealed number twins temperature higher increased considerably compared temperatures, indicating dislocation slips were suppressed during high-temperature stretching process. precipitates NiW phase sample, not clearly observed suggesting affected by formation these precipitates. Moreover, orientation relationship between matrix (200)Ni//(240)NiW [001]Ni//[001]NiW. tiny precipitated main reason increase.