An evaluation of shot peening, residual stress and stress relaxation on the fatigue life of AISI 4340 steel
Shot peening is a method widely used to improve the fatigue strength of materials, through the creation of a compressive residual stress field (CRSF) in their surface layers. In the present research the gain in fatigue life of AISI 4340 steel, used in landing gear, is evaluated under four shot peeni...
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| Veröffentlicht in: | International journal of fatigue 2002-08, Vol.24 (8), p.877-886 |
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| container_title | International journal of fatigue |
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| creator | Torres, M.A.S Voorwald, H.J.C |
| description | Shot peening is a method widely used to improve the fatigue strength of materials, through the creation of a compressive residual stress field (CRSF) in their surface layers. In the present research the gain in fatigue life of AISI 4340 steel, used in landing gear, is evaluated under four shot peening conditions. Rotating bending fatigue tests were conducted and the CRSF was measured by an X-ray tensometry prior and during fatigue tests. It was observed that relaxation of the CRSF occurred due to the fatigue process. In addition, the fractured fatigue specimens were investigated using a scanning electron microscope in order to obtain information about the crack initiation points. The evaluation of fatigue life, relaxation of CRSF and crack sources are discussed. |
| doi_str_mv | 10.1016/S0142-1123(01)00205-5 |
| format | Article |
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In the present research the gain in fatigue life of AISI 4340 steel, used in landing gear, is evaluated under four shot peening conditions. Rotating bending fatigue tests were conducted and the CRSF was measured by an X-ray tensometry prior and during fatigue tests. It was observed that relaxation of the CRSF occurred due to the fatigue process. In addition, the fractured fatigue specimens were investigated using a scanning electron microscope in order to obtain information about the crack initiation points. The evaluation of fatigue life, relaxation of CRSF and crack sources are discussed.</description><identifier>ISSN: 0142-1123</identifier><identifier>EISSN: 1879-3452</identifier><identifier>DOI: 10.1016/S0142-1123(01)00205-5</identifier><identifier>CODEN: IJFADB</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>4340 Steel ; Applied sciences ; Condensed matter: structure, mechanical and thermal properties ; Exact sciences and technology ; Fatigue ; Fatigue, brittleness, fracture, and cracks ; Mechanical and acoustical properties of condensed matter ; Mechanical properties of solids ; Metals. 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The evaluation of fatigue life, relaxation of CRSF and crack sources are discussed.</description><subject>4340 Steel</subject><subject>Applied sciences</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Exact sciences and technology</subject><subject>Fatigue</subject><subject>Fatigue, brittleness, fracture, and cracks</subject><subject>Mechanical and acoustical properties of condensed matter</subject><subject>Mechanical properties of solids</subject><subject>Metals. 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| ispartof | International journal of fatigue, 2002-08, Vol.24 (8), p.877-886 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | 4340 Steel Applied sciences Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Fatigue Fatigue, brittleness, fracture, and cracks Mechanical and acoustical properties of condensed matter Mechanical properties of solids Metals. Metallurgy Physics Residual stress Shot peening |
| title | An evaluation of shot peening, residual stress and stress relaxation on the fatigue life of AISI 4340 steel |
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