摘要： Thermo-mechanical fatigue (TMF) behavior of a newly developed ferritic stainless steel (Crofer 22 H) for planar solid oxide fuel cell (pSOFC) interconnect is investigated. TMF tests under various combinations of cyclic mechanical and thermal loadings are conducted in air at a temperature range of 25oC–800 °C. Experimental results show the number of cycles to failure for non-hold-time TMF loading is decreased with an increase in the minimum stress applied at 800 °C. There is very little effect of maximum stress applied at 25 °C on the number of cycles to failure. The non-hold-time TMF life is dominated by a fatigue mechanism involving cyclic high-temperature softening plastic deformation. A hold-time of 100 h for the minimum stress applied at 800 °C causes a significant drop of number of cycles to failure due to a synergistic action of fatigue and creep. Creep and creep–fatigue interaction mechanisms are the two primary contributors to the hold-time TMF damage. The creep damage ratio in the hold-time TMF damage is increased with a decrease in applied stress at 800 °C and an increase in number of cycles to failure. ► A thermo-mechanical fatigue testing technique for SOFC interconnect is developed. ► A fatigue mechanism involving cyclic plasticity dominates non-hold-time TMF life. ► Non-hold-time TMF life is increased with a decrease in applied stress at 800 °C. ► A 100-h hold-time of applied stress at 800 °C significantly reduces TMF life. ► Both creep and creep–fatigue interaction contribute to the hold-time TMF damage. 出版者： Amsterdam: Elsevier B.V 出版日期： 2012-12-01 出處： Journal of power sources, 2012-12, Vol.219, p.112-119 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2012 Elsevier B.V. 版權： 2015 INIST-CNRS 識別號： ISSN: 0378-7753 識別號： EISSN: 1873-2755 識別號： DOI: 10.1016/j.jpowsour.2012.07.038 識別號： CODEN: JPSODZ
