The effect of trepanning speed of laser drilled acute angled cooling holes on the high temperature low cycle corrosion fatigue performance of CMSX-4 at 850 °C

Nicolau Morar, Rajkumar Roy, Jorn Mehnen, J.R. Nicholls, Simon Gray

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The effect of laser trepanning speed and, as a result, recast layer thickness on the high temperature corrosion fatigue behaviour of CMSX-4 superalloy acute angled holes was investigated. The experimental test results show that an increasing laser drilling speed caused a reduction in corrosion fatigue life by 35–50% at 850 °C, under low cycle fatigue regime. This reduction was found to correlate directly with the recast layer thickness and surface anomalies within the recast layer produced during the laser drilling process. Corrosion had a smaller effect on the overall life of the laser drilled specimens under the conditions tested. The results presented show that laser trepanning speed is influential in limiting the life performance of laser drilled components in service.
LanguageEnglish
Pages112–120
Number of pages9
JournalInternational Journal of Fatigue
Early online date4 May 2017
DOIs
Publication statusPublished - 30 Sep 2017

Fingerprint

Corrosion fatigue
Corrosion
Acute
Fatigue
Cooling
Laser
Cycle
Lasers
Drilling
Temperature
Fatigue of materials
Low Cycle Fatigue
Superalloy
Fatigue Life
Superalloys
Correlate
Anomaly
Limiting

Keywords

  • hot corrosion
  • low cycle fatigue
  • corrosion fatigue
  • laser drilling
  • recast layer
  • CMSX-4

Cite this

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abstract = "The effect of laser trepanning speed and, as a result, recast layer thickness on the high temperature corrosion fatigue behaviour of CMSX-4 superalloy acute angled holes was investigated. The experimental test results show that an increasing laser drilling speed caused a reduction in corrosion fatigue life by 35–50{\%} at 850 °C, under low cycle fatigue regime. This reduction was found to correlate directly with the recast layer thickness and surface anomalies within the recast layer produced during the laser drilling process. Corrosion had a smaller effect on the overall life of the laser drilled specimens under the conditions tested. The results presented show that laser trepanning speed is influential in limiting the life performance of laser drilled components in service.",
keywords = "hot corrosion, low cycle fatigue, corrosion fatigue, laser drilling, recast layer, CMSX-4",
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The effect of trepanning speed of laser drilled acute angled cooling holes on the high temperature low cycle corrosion fatigue performance of CMSX-4 at 850 °C. / Morar, Nicolau; Roy, Rajkumar ; Mehnen, Jorn; Nicholls, J.R.; Gray, Simon.

In: International Journal of Fatigue, 30.09.2017, p. 112–120.

Research output: Contribution to journalArticle

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T1 - The effect of trepanning speed of laser drilled acute angled cooling holes on the high temperature low cycle corrosion fatigue performance of CMSX-4 at 850 °C

AU - Morar, Nicolau

AU - Roy, Rajkumar

AU - Mehnen, Jorn

AU - Nicholls, J.R.

AU - Gray, Simon

PY - 2017/9/30

Y1 - 2017/9/30

N2 - The effect of laser trepanning speed and, as a result, recast layer thickness on the high temperature corrosion fatigue behaviour of CMSX-4 superalloy acute angled holes was investigated. The experimental test results show that an increasing laser drilling speed caused a reduction in corrosion fatigue life by 35–50% at 850 °C, under low cycle fatigue regime. This reduction was found to correlate directly with the recast layer thickness and surface anomalies within the recast layer produced during the laser drilling process. Corrosion had a smaller effect on the overall life of the laser drilled specimens under the conditions tested. The results presented show that laser trepanning speed is influential in limiting the life performance of laser drilled components in service.

AB - The effect of laser trepanning speed and, as a result, recast layer thickness on the high temperature corrosion fatigue behaviour of CMSX-4 superalloy acute angled holes was investigated. The experimental test results show that an increasing laser drilling speed caused a reduction in corrosion fatigue life by 35–50% at 850 °C, under low cycle fatigue regime. This reduction was found to correlate directly with the recast layer thickness and surface anomalies within the recast layer produced during the laser drilling process. Corrosion had a smaller effect on the overall life of the laser drilled specimens under the conditions tested. The results presented show that laser trepanning speed is influential in limiting the life performance of laser drilled components in service.

KW - hot corrosion

KW - low cycle fatigue

KW - corrosion fatigue

KW - laser drilling

KW - recast layer

KW - CMSX-4

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