Surface Roughness Based Characterization of Slip Band for Damage Initiation in a Nickel Base Superalloy
This work presents a computational protocol, based on a variance analysis integrated with the bootstrap method, to investigate surface damage resulting from localization of plastic deformation in slip bands of a Ni-base superalloy. For assessment of fatigue crack initiation, surface roughness is int...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Kaunas University of Technology
2018-02-01
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| Series: | Medžiagotyra |
| Subjects: | |
| Online Access: | http://matsc.ktu.lt/index.php/MatSc/article/view/17684 |
| Summary: | This work presents a computational protocol, based on a variance analysis integrated with the bootstrap method, to investigate surface damage resulting from localization of plastic deformation in slip bands of a Ni-base superalloy. For assessment of fatigue crack initiation, surface roughness is introduced to quantify the degree of slip irreversibility. The contribution of this study is to provide a most relevant roughness parameter that can extract the salient features of slip bands within damaged grains, and thus enabling the discrimination of damaged and undamaged grains for description of fatigue-induced surface damage. Results suggest that the maximum peak height (<em>S<sub>p</sub></em>) is the most relevant parameter. And a very pronounced variability of <em>S<sub>p</sub></em> values is observed for damaged grains.<p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.24.1.17684">http://dx.doi.org/10.5755/j01.ms.24.1.17684</a></p> |
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| ISSN: | 1392-1320 2029-7289 |