Effect of shot peening on fatigue properties of high strength Al alloy in high humidity
Fatigue properties of shot-peened high strength Al-Cu-Mg alloys, extruded and drawn 2017-T4 alloys, and effect of humidity on the properties were investigated in relative humidity environments of 25% and 85% under rotating bending. Fatigue strength was increased by shot-peening in each humidity. Alt...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2015-04-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/81/825/81_15-00001/_pdf/-char/en |
| _version_ | 1828192585451044864 |
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| author | Norio KAWAGOISHI Kohji KARIYA Takanori NAGANO Qiang CHEN Qingyuan WANG Yuji KOBAYASHI |
| author_facet | Norio KAWAGOISHI Kohji KARIYA Takanori NAGANO Qiang CHEN Qingyuan WANG Yuji KOBAYASHI |
| author_sort | Norio KAWAGOISHI |
| collection | DOAJ |
| description | Fatigue properties of shot-peened high strength Al-Cu-Mg alloys, extruded and drawn 2017-T4 alloys, and effect of humidity on the properties were investigated in relative humidity environments of 25% and 85% under rotating bending. Fatigue strength was increased by shot-peening in each humidity. Although fatigue strength was largely decreased by high humidity in the electro-polished specimen, the decrease in fatigue strength was very small in the shot-peened one. In the electro-polished extruded alloy, the crack propagation changed from a shear mode to a tensile one with decreasing in stress level in high humidity, while the propagation in the shot-peened one was in a tensile mode only in both humidity environments similar to the ones in both of the electro-polished and the shot-peened specimens in low humidity. The propagation mode in the drawn alloy was a tensile one irrespective of stress level and humidity. Most of fracture surface in low humidity was occupied by striations in both of the electro-polished and the shot-peened specimens in both alloys. On the other hand, those in high humidity were covered with slip planes in the shear mode crack in the electro-polished extruded alloy, while a few granular facets in the extruded alloy or brittle striations in the drawn one were observed at the fracture surface in high humidity in addition to striations in the tensile one irrespective of stress level and shot peening. |
| first_indexed | 2024-04-12T08:57:46Z |
| format | Article |
| id | doaj.art-fbfba52a53054917ad7a737becbd72e2 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-12T08:57:46Z |
| publishDate | 2015-04-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-fbfba52a53054917ad7a737becbd72e22022-12-22T03:39:21ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612015-04-018182515-0000115-0000110.1299/transjsme.15-00001transjsmeEffect of shot peening on fatigue properties of high strength Al alloy in high humidityNorio KAWAGOISHI0Kohji KARIYA1Takanori NAGANO2Qiang CHEN3Qingyuan WANG4Yuji KOBAYASHI5Department of Mechanical System Engineering, Dai-ichi Institute of TechnologyDepartment of Mechanical System Engineering, Dai-ichi Institute of TechnologyDepartment of Mechanical Engineering, Miyakonojo National College of TechnologyCenter for Globalization, Kumamoto UniversityDepartment of Civil Engineering and Mechanics, Sichuan UniversityShinto Kogo LTD.Fatigue properties of shot-peened high strength Al-Cu-Mg alloys, extruded and drawn 2017-T4 alloys, and effect of humidity on the properties were investigated in relative humidity environments of 25% and 85% under rotating bending. Fatigue strength was increased by shot-peening in each humidity. Although fatigue strength was largely decreased by high humidity in the electro-polished specimen, the decrease in fatigue strength was very small in the shot-peened one. In the electro-polished extruded alloy, the crack propagation changed from a shear mode to a tensile one with decreasing in stress level in high humidity, while the propagation in the shot-peened one was in a tensile mode only in both humidity environments similar to the ones in both of the electro-polished and the shot-peened specimens in low humidity. The propagation mode in the drawn alloy was a tensile one irrespective of stress level and humidity. Most of fracture surface in low humidity was occupied by striations in both of the electro-polished and the shot-peened specimens in both alloys. On the other hand, those in high humidity were covered with slip planes in the shear mode crack in the electro-polished extruded alloy, while a few granular facets in the extruded alloy or brittle striations in the drawn one were observed at the fracture surface in high humidity in addition to striations in the tensile one irrespective of stress level and shot peening.https://www.jstage.jst.go.jp/article/transjsme/81/825/81_15-00001/_pdf/-char/enfatigueshot peeninghigh strength al alloyhumiditytexturecrack growth mechanism |
| spellingShingle | Norio KAWAGOISHI Kohji KARIYA Takanori NAGANO Qiang CHEN Qingyuan WANG Yuji KOBAYASHI Effect of shot peening on fatigue properties of high strength Al alloy in high humidity Nihon Kikai Gakkai ronbunshu fatigue shot peening high strength al alloy humidity texture crack growth mechanism |
| title | Effect of shot peening on fatigue properties of high strength Al alloy in high humidity |
| title_full | Effect of shot peening on fatigue properties of high strength Al alloy in high humidity |
| title_fullStr | Effect of shot peening on fatigue properties of high strength Al alloy in high humidity |
| title_full_unstemmed | Effect of shot peening on fatigue properties of high strength Al alloy in high humidity |
| title_short | Effect of shot peening on fatigue properties of high strength Al alloy in high humidity |
| title_sort | effect of shot peening on fatigue properties of high strength al alloy in high humidity |
| topic | fatigue shot peening high strength al alloy humidity texture crack growth mechanism |
| url | https://www.jstage.jst.go.jp/article/transjsme/81/825/81_15-00001/_pdf/-char/en |
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