Strain rate effect on cyclic deformation behaviour of advanced ultra-super critical boiler grade wrought Ni-based superalloy IN740H at 760 °C
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
View Archive Info| Field | Value | |
| Title |
Strain rate effect on cyclic deformation behaviour of advanced ultra-super critical boiler grade wrought Ni-based superalloy IN740H at 760 °C
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| Creator |
Singh, R K
Sahu, J K Tarafder, S |
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| Subject |
Materials Charcterization
Structural Properties |
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| Description |
In order to understand the simultaneous operation of fatigue and creep mechanisms, strain rate (ε ̇) effect on low cycle fatigue (LCF) behaviour of recently developed power plant grade wrought Ni-based superalloy IN740H was studied. Fatigue experiments were conducted in air, at 760oC at ε ̇ values 10-2, 10-3 and 10-4 s-1. The fatigue life significantly decreased at lower ε ̇ values. Bilinear Coffin-Manson slopes were obtained for all ε ̇ values. Through microstructural studies, it was ascertained that decrease in fatigue life at lower ε ̇ value can be attributed to ingress of oxygen by grain boundary diffusion and intergranular crack initiation and growth.
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| Publisher |
Elsevier
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| Date |
2016
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://eprints.nmlindia.org/7424/1/MSEA.pdf
Singh, R K and Sahu, J K and Tarafder, S (2016) Strain rate effect on cyclic deformation behaviour of advanced ultra-super critical boiler grade wrought Ni-based superalloy IN740H at 760 °C. Materials Science and Engineering A, 658 (IF-3.094). pp. 272-279. |
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| Relation |
http://dx.doi.org/10.1016/j.msea.2016.02.007
http://eprints.nmlindia.org/7424/ |
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