Residual stress relaxation in shot peened high strength low alloy steel
| Autor: | A. Turnbull, J. D. Lord, J. J. Pitts |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
High-strength low-alloy steel
Yield (engineering) Materials science Mechanical Engineering Metallurgy Peening engineering.material Condensed Matter Physics Shot peening Stress (mechanics) Mechanics of Materials Residual stress engineering Relaxation (physics) General Materials Science Compression (geology) |
| Zdroj: | Materials Science and Technology. 24:327-334 |
| ISSN: | 1743-2847 0267-0836 |
| Popis: | The relaxation of residual stress in a shot peened high strength low alloy steel in response to applied loads has been investigated for both single shot and cyclic loading. The near surface residual stress was measured predominantly by X-ray diffraction (first 10 μm) but supplemented for some conditions by measurements using high resolution, fine increment hole drilling to yield depth profiling. The compressive residual stress showed a peak at ∼50 μm below the surface. Under single shot compressive loading, relaxation became significant when the combined surface and applied compressive stresses exceeded the proportional limit of the unpeened surface. The steel showed good resistance to residual stress relaxation under cyclic loading conditions, with only a 13% decrease despite cyclic load amplitudes at 50% of the 0˙2% proof stress in compression. Significant relaxation did occur at applied stress amplitudes of ∼80% of the 0˙2% proof stress in compression. While large single shot or cyclic stresses... |
| Databáze: | OpenAIRE |
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