326 Mechanical Behavior of Experimental Oxidation and Sulfidation Resistant Alloys at Elevated Temperatures

概要

論文の詳細を見る
Oxidation and sulfidation resistant alloys based on Fe-16Cr-Ni-2Mn-1Mo are currently being developed for use in power plants. The need for sulfidation-resistant alloys is driven by the presence of fireside corrosion in tubing applications and the increased development of power plants burning refuse derived fuels. The tensile behavior of the experimental oxidation and sulfidation resistant alloys has been investigated at 600℃, 700℃, and 800℃. The addition of strong carbide-and nitride-formers is shown to keep the ultimate tensile strength above 300 MPa and yield strength above 130 MPa at 700℃. Serrated flow accompanying a decrease in ductility is observed at 600℃ in all but the most highly alloyed material. Strain rate effects were found to be negligible at room temperature, but a factor of ten decrease in strain rate at 600℃ was found to decrease the tensile strength and reduction-in-area in solid solution alloys, and decrease the tensile strength and reduction-in-area and increase the yield strength in the alloys with precipitates. Creep and stress-rupture tests are underway to determine life as well as the stability of carbides and nitrides at elevated temperatures under applied stresses.
一般社団法人日本機械学会の論文