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| CREEP BEHAVIOUR OF ZrO_2-DISPERSED FeCrAl ALLOY AT 600℃ IN CORROSIVE ENVIRONMENT |
| Duan Xuezhang; Bai Linxiang (Corrosion Science Laboratory; Chinese Academy of Sciences) |
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Abstract Creep behaviour of FeCrAl and FeCrAl-ZrO_2 alloys have been investigated at 600℃ under the stress of 115.2 MPa in corrosive environment. The corrosive environments under study include air, gas mixture of N_2-10％O_2-1％SO_2 and surface salt coating (75％Na_2SO_4+25％ NaCl) of 2mg·cm~(-2) in the gas mixture. With the dispersion of ZrO_2 partitles, creep rates of the alloy remarkably decrease and creep lifes remarkably increase and sensibility of creep fracture in the corrosive environments decrease. The corrosion process facilitates crack initiation and crack extension during the creep at 600℃ for FeCrAl and FeCrAl-ZrO_2 alloy.
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Received: 25 June 1992
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