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Mechanical characterization of craters induced by impacting foreign objects on Inconel718.

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Title: Mechanical characterization of craters induced by impacting foreign objects on Inconel718.
Authors: Farahani, Hamed K.1 hamedfarahani91@gmail.com, Ketabchi, Mostafa1, Zangeneh, Shahab2
Source: International Journal of Damage Mechanics. Jun2018, Vol. 27 Issue 6, p937-949. 13p.
Subjects: Mechanical behavior of materials, Inconel, Heat resistant alloys, Scanning electron microscopy, Computer simulation, Microcracks, Fracture mechanics
Abstract: In this study, foreign object damage on aircraft high pressure compressor blades made of Inconel718 nickel-based superalloy was experimentally simulated at the working temperatures of the blades. Steel balls (as a foreign objects) with velocities of 292, 208, 133 m/s were impacted on the surface of Inconel718 flat specimens at various temperatures (400, 475, 550, and 625℃). In order to characterize induced craters, impact sites were studied by scanning electron microscopy to identify mechanical features such as microcracks and notches. Then, the specimens were 3D scanned to measure the depth of each crater. It was found that variation of stress concentration factors and induced damages (including microcracks and notches, loss of material, and shear bands) could occur as a result of steel ball impact with velocities of 292 and 133 m/s at temperatures of 625 and 400℃, respectively. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Damage Mechanics is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Mechanical characterization of craters induced by impacting foreign objects on Inconel718.
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  Data: <searchLink fieldCode="AR" term="%22Farahani%2C+Hamed+K%2E%22">Farahani, Hamed K.</searchLink><relatesTo>1</relatesTo><i> hamedfarahani91@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Ketabchi%2C+Mostafa%22">Ketabchi, Mostafa</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zangeneh%2C+Shahab%22">Zangeneh, Shahab</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Damage+Mechanics%22">International Journal of Damage Mechanics</searchLink>. Jun2018, Vol. 27 Issue 6, p937-949. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Inconel%22">Inconel</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+resistant+alloys%22">Heat resistant alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy%22">Scanning electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Microcracks%22">Microcracks</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+mechanics%22">Fracture mechanics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this study, foreign object damage on aircraft high pressure compressor blades made of Inconel718 nickel-based superalloy was experimentally simulated at the working temperatures of the blades. Steel balls (as a foreign objects) with velocities of 292, 208, 133 m/s were impacted on the surface of Inconel718 flat specimens at various temperatures (400, 475, 550, and 625℃). In order to characterize induced craters, impact sites were studied by scanning electron microscopy to identify mechanical features such as microcracks and notches. Then, the specimens were 3D scanned to measure the depth of each crater. It was found that variation of stress concentration factors and induced damages (including microcracks and notches, loss of material, and shear bands) could occur as a result of steel ball impact with velocities of 292 and 133 m/s at temperatures of 625 and 400℃, respectively. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Damage Mechanics is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1177/1056789517714604
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 937
    Subjects:
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Inconel
        Type: general
      – SubjectFull: Heat resistant alloys
        Type: general
      – SubjectFull: Scanning electron microscopy
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Microcracks
        Type: general
      – SubjectFull: Fracture mechanics
        Type: general
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      – TitleFull: Mechanical characterization of craters induced by impacting foreign objects on Inconel718.
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            NameFull: Farahani, Hamed K.
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            NameFull: Ketabchi, Mostafa
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            NameFull: Zangeneh, Shahab
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            – D: 01
              M: 06
              Text: Jun2018
              Type: published
              Y: 2018
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            – TitleFull: International Journal of Damage Mechanics
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