Influence of orientation-dependent grain boundary oxidation on fatigue cracking behaviour in an advanced Ni-based superalloy
Influence of orientation-dependent grain boundary oxidation on fatigue cracking behaviour in an advanced Ni-based superalloy
复制标题
取向相关晶界氧化对先进镍基高温合金疲劳裂纹行为的影响
DOI：
10.1007/s10853-015-8992-2
复制
发表时间：
2015
影响因子：
4.5
通讯作者：
Jiang R
中科院分区：
文献类型：
--
作者：
Jiang R
在 650°C 空气中、三点弯曲载荷下对先进盘式镍基高温合金 [低固溶度、高耐火 (LSHR) 合金] 进行了疲劳测试，以研究取向相关晶界 (GB) 氧化在裂纹萌生和早期扩展中的作用。研究发现裂纹萌生主要发生在凸出的晶界氧化物上，并且裂纹主要沿着氧化晶界扩展。这些凸出的氧化物富含 Co，并且优先在高施密德因子晶粒和低施密德因子晶粒之间的边界处形成，这些晶粒垂直于所施加的拉伸应力方向倾斜。同时，相对平坦/薄的富镍/钛/富铝氧化物复合物也在其他晶界处形成，但与凸出的GB富钴氧化物复合物相比，它们对疲劳裂纹萌生和扩展的危害似乎要小得多。
Fatigue tests have been conducted on an advanced disc Ni-based superalloy [low solvus, high refractory (LSHR) alloy] at 650 °C in air under three-point bend loading to investigate the role of orientation-dependent grain boundary (GB) oxidation in crack initiation and early propagation. It is found that crack initiation occurs mainly from bulged GB oxides, and cracks then predominantly propagate along the oxidised grain boundaries. These bulged oxides are extremely enriched in Co and preferentially form at the boundaries between high and low Schmid factor grains which are inclined normal to the applied tensile stress direction. Meanwhile, relatively flat/thin Ni/Ti/Al-rich oxide complexes also form at other grain boundaries, but they appear to be much less detrimental in fatigue crack initiation and propagation compared with the bulged GB Co-rich oxide complexes.
影响因子：
6
作者：
Jiang, R.;Everitt, S.;Reed, P. A. S.
通讯作者：
Reed, P. A. S.
影响因子：
9.4
作者：
R. Molins;G. Hochstetter;J. Chassaigne;E. Andrieu
通讯作者：
R. Molins;G. Hochstetter;J. Chassaigne;E. Andrieu
通过晶界工程型加工提高高温下的抗晶间裂纹和腐蚀能力
影响因子：
4.5
作者：
U. Krupp
通讯作者：
U. Krupp