研究目的
Investigating the effect of laser shock peening (LSP) on the fatigue behavior of 2205 duplex stainless steel (DSS) with different sample geometries (fillet and notched).
研究成果
The LSP treatment improves the fatigue life of notched samples but decreases it in fillet samples due to differences in residual stress distribution and fatigue crack growth direction influenced by sample geometry.
研究不足
The study is limited to the effects of LSP on 2205 DSS with specific geometries (fillet and notched) under certain conditions. The findings may not be generalizable to other materials or geometries.
1：Experimental Design and Method Selection:
The study involved treating two different stress raiser geometries (fillet and notched) with laser shock peening (LSP) using a Nd:YAG pulsed laser. The residual stress distribution was assessed both experimentally and through MEF simulation.
2：Sample Selection and Data Sources:
Samples were machined from a cold rolled plate of 2205 DSS with specific dimensions for fatigue tests.
3：List of Experimental Equipment and Materials:
Nd:YAG pulsed laser with 1064 nm wavelength, 10 Hz frequency, and 0.85 J/pulse; MTS-810 servo-hydraulic machine for fatigue tests; ABAQUS/EXPLICIT software for MEF simulation.
4：85 J/pulse; MTS-810 servo-hydraulic machine for fatigue tests; ABAQUS/EXPLICIT software for MEF simulation. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: LSP treatment was applied to both sides of the samples. Fatigue tests were conducted with a load ratio of R =
5：1 and a frequency of 20 Hz. Data Analysis Methods:
Residual stress measurements were performed using the hole drilling method. Fatigue crack growth was monitored using a high-speed CCD camera.
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