The role of δ phase for fatigue crack propagation behavior in a Ni base superalloy at room temperature
The role of δ phase for fatigue crack propagation behavior in a Ni base superalloy at room temperature
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δ 相对室温镍基高温合金疲劳裂纹扩展行为的作用
DOI:
10.1016/j.msea.2016.12.029
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发表时间:
2017-01
期刊:
影响因子:
--
通讯作者:
Xiu Song
中科院分区:
文献类型:
--
作者:
Jinlan An;Lei Wang;Yang Liu;Wenliang Cai;Xiu Song
The fatigue crack propagation behavior of a Ni base superalloy at room temperature with various volume fractions of δ phase was investigated. The result shows that fatigue crack growth rate of the alloy increases as δ phase volume fraction increases, while both the fatigue crack propagation resistance and the strength of the alloy decrease. The characteristic of δ phase on crack propagation behavior is depended on the dislocations slipping blocked by granular δ phase with low length-diameter radio. On the other hand, dislocations easily piled up around long needle-like δ phase which leads to stress concentration. This stress concentration causes δ phase debonding from the matrix and helps the crack easy propagates along long needle-like δ phase surrounded by precipitates free zone (PFZ).
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影响因子:
5.4
作者:
S. Henkel;D. Holländer;M. Wünsche;H. Theilig-;P. Hübner;H. Biermann;S. Mehringer
通讯作者:
S. Henkel;D. Holländer;M. Wünsche;H. Theilig-;P. Hübner;H. Biermann;S. Mehringer
影响因子:
2.4
作者:
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影响因子:
6
作者:
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通讯作者:
Suresh, S
DOI:
10.1111/j.1460-2695.1987.tb01153.x
发表时间:
1987-02
影响因子:
3.7
作者:
K. Miller
通讯作者:
K. Miller
DOI:
10.1007/bf02646402
发表时间:
1978-04
期刊:
Metallurgical Transactions A
影响因子:
--
作者:
M. Clavel;André Pineau
通讯作者:
M. Clavel;André Pineau