Creep strengthening of Ni3(Al, Si) intermetallic alloy by ductile precipitates

In the present work, compression creep tests were performed on the Ni78Al11Si11 alloy (in at.%) at temperatures and stresses near that of the flow stress peak observed at about 550 °C. The stress exponent and activation energy of creep were determined. First observations of the microscopic creep behaviour were made after a low strain by transmission electron microscopy.