The Constant-Stress, Constant-Heating-Rate Behavior of an Additively Manufactured ODS Superalloy
摘要
The creep behavior of the oxide-dispersion-strengthened alloy GRX-810 fabricated by powder coating followed by laser-powder-bed fusion was evaluated via constant-stress, constant-heating-rate (CSCHR) tension testing using stresses of 69, 97, 121, and 173 MPa and a heating rate of 75 °C/min. Arrhenius plots derived from CSCHR strain-versus-temperature measurements revealed an apparent activation energy which increased with increasing stress. These findings were interpreted in terms of the effect of temperature on the threshold stress for creep deformation.