Fatigue properties of friction stir welded butt joint and base metal of MB8 magnesium alloy
The fatigue properties of friction stir welded （FSW） butt joint and base metal of MB8 magnesium alloy were investigated. The comparative fatigue tests were carried out using EHF-EM2OOK2-070-IA fatigue testing machine for both FSW butt joint and base metal specimens. The fatigue fractures were observ...
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| Veröffentlicht in: | 中国焊接 2016-03, Vol.25 (1), p.1-7 |
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| container_title | 中国焊接 |
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| creator | 何柏林 熊磊 于影霞 吕宗敏 满华 江民华 |
| description | The fatigue properties of friction stir welded （FSW） butt joint and base metal of MB8 magnesium alloy were investigated. The comparative fatigue tests were carried out using EHF-EM2OOK2-070-IA fatigue testing machine for both FSW butt joint and base metal specimens. The fatigue fractures were observed and analyzed using a scanning electron microscope of JSM-6063LA type. The experimental results show that the fatigue performance of the FSW butt joint of MB8 magnesium alloy is sharply decreased. The conditional fatigue limit （2 x 106） of base metal and welded butt joint is about 77.44 MPa and 49. 91 MPa, respectively. The conditional fatigue limit （2 x 106 ） of the welded butt joint is 64.45% of that of base metal. The main reasons are that the welding can lead to stress concentration in the flash area, tensile welding residual stress in the welded joint（ The residual stress value was 30. 5 MPa）, as well as the grain size is not uniform in the heat-affected zone. The cleavage steps or quasi-cleavage patterns present on the fatigue fracture surface, the fracture type of the FSW butt joint belongs to a brittle fracture. |
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The comparative fatigue tests were carried out using EHF-EM2OOK2-070-IA fatigue testing machine for both FSW butt joint and base metal specimens. The fatigue fractures were observed and analyzed using a scanning electron microscope of JSM-6063LA type. The experimental results show that the fatigue performance of the FSW butt joint of MB8 magnesium alloy is sharply decreased. The conditional fatigue limit （2 x 106） of base metal and welded butt joint is about 77.44 MPa and 49. 91 MPa, respectively. The conditional fatigue limit （2 x 106 ） of the welded butt joint is 64.45% of that of base metal. The main reasons are that the welding can lead to stress concentration in the flash area, tensile welding residual stress in the welded joint（ The residual stress value was 30. 5 MPa）, as well as the grain size is not uniform in the heat-affected zone. The cleavage steps or quasi-cleavage patterns present on the fatigue fracture surface, the fracture type of the FSW butt joint belongs to a brittle fracture.</description><identifier>ISSN: 1004-5341</identifier><language>eng</language><publisher>Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang, 330013</publisher><subject>基体金属 ; 对接接头 ; 搅拌摩擦焊 ; 摩擦搅拌焊接 ; 摩擦焊接头 ; 疲劳性能 ; 疲劳试验机 ; 镁合金</subject><ispartof>中国焊接, 2016-03, Vol.25 (1), p.1-7</ispartof><rights>Copyright © Wanfang Data Co. Ltd. All Rights Reserved.</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85464X/85464X.jpg</thumbnail><link.rule.ids>314,777,781</link.rule.ids></links><search><creatorcontrib>何柏林 熊磊 于影霞 吕宗敏 满华 江民华</creatorcontrib><title>Fatigue properties of friction stir welded butt joint and base metal of MB8 magnesium alloy</title><title>中国焊接</title><addtitle>China Welding</addtitle><description>The fatigue properties of friction stir welded （FSW） butt joint and base metal of MB8 magnesium alloy were investigated. The comparative fatigue tests were carried out using EHF-EM2OOK2-070-IA fatigue testing machine for both FSW butt joint and base metal specimens. The fatigue fractures were observed and analyzed using a scanning electron microscope of JSM-6063LA type. The experimental results show that the fatigue performance of the FSW butt joint of MB8 magnesium alloy is sharply decreased. The conditional fatigue limit （2 x 106） of base metal and welded butt joint is about 77.44 MPa and 49. 91 MPa, respectively. The conditional fatigue limit （2 x 106 ） of the welded butt joint is 64.45% of that of base metal. The main reasons are that the welding can lead to stress concentration in the flash area, tensile welding residual stress in the welded joint（ The residual stress value was 30. 5 MPa）, as well as the grain size is not uniform in the heat-affected zone. The cleavage steps or quasi-cleavage patterns present on the fatigue fracture surface, the fracture type of the FSW butt joint belongs to a brittle fracture.</description><subject>基体金属</subject><subject>对接接头</subject><subject>搅拌摩擦焊</subject><subject>摩擦搅拌焊接</subject><subject>摩擦焊接头</subject><subject>疲劳性能</subject><subject>疲劳试验机</subject><subject>镁合金</subject><issn>1004-5341</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNotkMtOwzAQRbMAiVL4B4sNq0ieOM5jCRUFpCI2sGIRjR9JHSV2sR1V5esxKqurkc6c0dyLbAWUljlnJVxl1yGMlLK2pvUq-9piNMOiycG7g_bR6EBcT3pvZDTOkhCNJ0c9Ka2IWGIkozM2ErRpxKDJrCNOfxtvjw2ZcbA6mGUmOE3udJNd9jgFffuf6-xz-_Sxecl378-vm4ddLqFoIZcIsi8EVbWiTFYtrQUVlAkQIFlVNqXiknMGWDfQ9FXdKJUeEQnEBrjSbJ3dn71HtD3aoRvd4m262P0M-7HTBYWKpgIgkXdnUu6dHb5NYg_ezOhPXZV8JfCiYr9v-Voz</recordid><startdate>20160325</startdate><enddate>20160325</enddate><creator>何柏林 熊磊 于影霞 吕宗敏 满华 江民华</creator><general>Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang, 330013</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>20160325</creationdate><title>Fatigue properties of friction stir welded butt joint and base metal of MB8 magnesium alloy</title><author>何柏林 熊磊 于影霞 吕宗敏 满华 江民华</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1291-ca1cf2b0d7d03c6907b0b03b1b1c36484d5c5531a7818f678dd534b690a815de3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>基体金属</topic><topic>对接接头</topic><topic>搅拌摩擦焊</topic><topic>摩擦搅拌焊接</topic><topic>摩擦焊接头</topic><topic>疲劳性能</topic><topic>疲劳试验机</topic><topic>镁合金</topic><toplevel>online_resources</toplevel><creatorcontrib>何柏林 熊磊 于影霞 吕宗敏 满华 江民华</creatorcontrib><collection>维普_期刊</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>维普中文期刊数据库</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>中国焊接</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>何柏林 熊磊 于影霞 吕宗敏 满华 江民华</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fatigue properties of friction stir welded butt joint and base metal of MB8 magnesium alloy</atitle><jtitle>中国焊接</jtitle><addtitle>China Welding</addtitle><date>2016-03-25</date><risdate>2016</risdate><volume>25</volume><issue>1</issue><spage>1</spage><epage>7</epage><pages>1-7</pages><issn>1004-5341</issn><abstract>The fatigue properties of friction stir welded （FSW） butt joint and base metal of MB8 magnesium alloy were investigated. The comparative fatigue tests were carried out using EHF-EM2OOK2-070-IA fatigue testing machine for both FSW butt joint and base metal specimens. The fatigue fractures were observed and analyzed using a scanning electron microscope of JSM-6063LA type. The experimental results show that the fatigue performance of the FSW butt joint of MB8 magnesium alloy is sharply decreased. The conditional fatigue limit （2 x 106） of base metal and welded butt joint is about 77.44 MPa and 49. 91 MPa, respectively. The conditional fatigue limit （2 x 106 ） of the welded butt joint is 64.45% of that of base metal. The main reasons are that the welding can lead to stress concentration in the flash area, tensile welding residual stress in the welded joint（ The residual stress value was 30. 5 MPa）, as well as the grain size is not uniform in the heat-affected zone. The cleavage steps or quasi-cleavage patterns present on the fatigue fracture surface, the fracture type of the FSW butt joint belongs to a brittle fracture.</abstract><pub>Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang, 330013</pub><tpages>7</tpages></addata></record> |
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| ispartof | 中国焊接, 2016-03, Vol.25 (1), p.1-7 |
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| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | 基体金属 对接接头 搅拌摩擦焊 摩擦搅拌焊接 摩擦焊接头 疲劳性能 疲劳试验机 镁合金 |
| title | Fatigue properties of friction stir welded butt joint and base metal of MB8 magnesium alloy |
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