摘要
Creep/fatigue accelerated failures of K403 superalloy turbine blades are inspected, and the damage behaviors are revealed and failure modes are determined in laboratory. It is concluded that: (1) significant discrepancies of fractographies and cross-sectional microstructures are interpreted by qualitative and quantitative investigations; (2) the observed morphologies are mainly attributed to the dendrite separation and γ' phase rafting behaviors, together with the development of ‘void migration mechanism’, i.e., grain interior → grain boundary → sub grain boundary; (3) the failure of turbine blade changes from the mixed to the intergranular mode, which is essentially controlled by the contribution proportion of creep damage and fatigue damage.
源语言 | 英语 |
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文章编号 | 106558 |
期刊 | International Journal of Fatigue |
卷 | 154 |
DOI | |
出版状态 | 已出版 - 1月 2022 |
已对外发布 | 是 |