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| 1 | Pinless Friction Stir Welding of AA2024-T3Joint and Its Failure Modes显示文摘The joining of aluminum alloy sheets with thickness less than 2.0 mm is difficult via conventional frictionstir welding owing to the defects in the joint, such as root flaw, keyhole and lazy S. In the present research, a newlydesigned pinless tool with involute grooves on its shoulder surface was applied to weld 1.5 mm thick AA2024-T3. Theeffects of the rotating speed and welding speed on the microstructure and mechanical properties of the joints were analyzed.The experimental results showed that the root flaw and keyhole were successfully eliminated. The lazy S wasalso eliminated under the optimized welding parameters. The maximum tensile strength of the joints was 326 MPa,which is about 74.1% that of the base material. Moreover, all the tensile samples fractured from the retreating side.Two fracture modes were observed during the tensile tests, which are related with the lazy S. | Li Wenya Li Jinfeng Zhang Zhihan Gao Dalu Wang Weibing Luan Guohong | 2014 | Transactions of Tianjin University2014，20，6： | 6 |
| 2 | Microstructure and mechanical properties of friction stirwelded joints in 2219-T6 aluminum alloy显示文摘 | XU Weifeng LIU Jinhe LUAN Guohong | 2009 | Materialsand Design2009，30，9： | 1 |
| 3 | Effect ofroot flaws on the fatigue property of friction stir welds in2024-T3 aluminum alloys显示文摘 | ZHOU Caizhi YANG Xinqi LUAN Guohong | 2006 | Materials Science andEngineering A2006，418，12： | 1 |
| 4 | Temperature evolution, microstructure and mechanical properties of friction stir welded thick 2219-O aluminum alloy joints 显示文摘 | Xu Weifeng Liu Jinhe Luan Guohong et ol | 2009 | Materials and Design2009，30，6： | 1 |
| 5 | Effect of root flaws on the fatigue property of friction stir welds in 2024-T3 aluminum alloys显示文摘 | Caizhi Zhou Xinqi Yang Guohong Luan | 2005 | Materials Science & Engineering A2005，，1： | 1 |
| 6 | Microstructure andmechanical properties of friction stir welded joints in 2219-T6 alu-minum alloy 显示文摘 | Weifeng Xu Jinhe Liu Guohong Luan | 2009 | Materials and Design2009，30，9： | 1 |
| 7 | Comparative study on fatigue prosperities between AA2024-T4 friction stir welds and base materials显示文摘 | Di Shusheng Yang Xinqi Luan Guohong | | 0，，： | 1 |
| 8 | Investigation of microstructures and fatigue properties of friction stir welded Al -Mg alloy 显示文摘 | Zhou Caizhi Yang Xinqi Luan Guohong | 2006 | Materials Chemistry and Physics2006，98，： | 1 |
| 9 | Effect of root flaws on the fatigue property of friction stir welds in 2024-T3 aluminum alloys显示文摘 | Zhou Caizhi Yang Xinqi Luan Guohong | 2006 | Materials Science and Engineering A2006，418，12： | 1 |
| 10 | Effect of rootflaws on the fatigue property of friction stir welds in 2024-T3 aluminum alloys显示文摘 | Zhou Caizhi Yang Xinqi Luan Guohong | 2006 | Materials Science and EngineeringA2006，418，12： | 1 |
| 11 | Effect of root flaws on the fatigue property of friction stir welds in 2024 - T3 aluminum alloys 显示文摘 | Zhou Caizhi Yang Xinqi Luan Guohong | 2006 | Materials Science and Engineering A2006，418，12： | 1 |
| 12 | Effect of kissing bond on fatigue behavior of friction stir welds on Al 5083 alloy显示文摘 | Zhou Caizhi Yan Xinqi Luan Guohong | 2006 | Journal of Materials Science2006，41，： | 1 |
| 13 | Microstructure and mechanical properties of friction stir welded joints in 2219-T6 aluminum alloy显示文摘 | Weifeng Xu Jinhe Liu Guohong Luan Chunlin Dong | 2009 | Materials and Design2009，，9： | 1 |
| 14 | Effect of Root Flaws on the Fatigue Property of Friction Stir Welds in 2024-T3 Aluminum Lloys显示文摘 | Zhou Caizhi Yang Xinqi Luan Guohong | 2006 | Materials Science and Engineering A2006，418，12： | 1 |
| 15 | Effect of kissing bond on fatigue behavior of friction stir welds on Al 5083 alloy显示文摘 | ZHOU CAIZHI YANG XINQI LUAN GUOHONG | 2006 | Journal of Materials Science2006，41，： | 1 |
| 16 | Investigation ofmicrostructures and fatigue properties of friction stir welded Al-Mgalloy显示文摘 | Zhou Caizhi Yang Xinqi Luan Guohong | 2006 | Materials Chemistry andPhysics2006，98，： | 1 |
| 17 | Friction Stir Welding of Al Alloy Thin Plate by Rotational Tool without Pin显示文摘For friction stir welding (FSW), a new idea is put forward in this paper to weld the thin plate of Al alloy by using the rotational tool without pin. The experiments of FSW are carried out by using the tools with inner-concave-flute shoulder, concentric-circles-flute shoulder and three-spiral-flute shoulder, respectively. The experimental results show that the grain size in weld nugget zone attained by the tool with three-spiral-flute shoulder is nearly the same while the grain sizes decrease with the decrease of welding velocity. The displacement of material flow in the heat-mechanical affected zone by the tool with three-spiral-flute shoulder is much larger than that by the tool with inner-concave-flute shoulder or concentric-circles-flute shoulder. The above-mentioned results are verified by numerical simulation. For the tool with three-spiral-flute shoulder, the tensile strength of FSW joint increases with the decrease of welding velocity while the value of tensile strength attained by the welding velocity of 20 mm/min and the rotation speed of 1800 r/min is about 398 MPa, which is 80% more than that of parent mental tensile strength. Those verify that the tool with three-spiral-flute shoulder can be used to join the thin plate of Al alloy. | Liguo Zhang Shude Ji Guohong Luan Chunlin Dong Li Fu | 2011 | Journal of Materials Science & Technology2011，27，7： | 0 |
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