The influence of residual stress on fatigue crack growth rates of additively manufactured Type 304L stainless steel
•Fatigue crack growth rates in AM material are higher than wrought due to residual stress.•Residual stress of DED 304L is tensile at the edges and compressive at the center.•Tensile residual stress results in positive values of Kres for an edge crack.•Fatigue crack growth rates of DED 304L corrected...
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| Veröffentlicht in: | International journal of fatigue 2022-09, Vol.162 (C), p.106954, Article 106954 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
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| Online-Zugang: | Volltext |
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| Zusammenfassung: | •Fatigue crack growth rates in AM material are higher than wrought due to residual stress.•Residual stress of DED 304L is tensile at the edges and compressive at the center.•Tensile residual stress results in positive values of Kres for an edge crack.•Fatigue crack growth rates of DED 304L corrected for Kres are similar to wrought.
To examine the influence of residual stress on mechanical performance, specifically fatigue crack growth resistance, additively manufactured (AM) Type 304L stainless steel produced by directed energy deposition (DED) was evaluated and compared to conventional wrought Type 304/304L stainless steel. Increasing and decreasing alternating stress intensity factor (ΔK) tests were used to assess fatigue crack growth behavior over a range of crack growth rates in the near threshold regime ( |
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| ISSN: | 0142-1123 1879-3452 |
| DOI: | 10.1016/j.ijfatigue.2022.106954 |