|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Improving weld formability by a novel dual-rotation bobbin tool friction stir welding显示文摘A novel dual-rotation bobbin tool friction stir welding(DBT-FSW) was developed, in which the upper shoulder(US) and lower shoulder(LS) have different rotational speeds. This process was tried to weld 3.2 mm thick aluminum-lithium alloy sheets. The metallographic analysis and torque measurement were carried out to characterize the weld formability. Experimental results show that compared to conventional bobbin tool friction stir welding, the DBT-FSW has an excellent process stability, and can produce the defect-free joints in a wider range of welding parameters. These can be attributed to the significant improvement of material flow caused by the formation of a staggered layer structure and the unbalanced force between the US and LS during the DBT-FSW process. | F.F.Wang W.Y.Li J.Shen Q.Wen J.F.dos Santos | 2018 | Journal of Materials Science & Technology2018，34，1： | 9 |
| 2 | Experimental and numerical investigations of bonding interface behavior in stationary shoulder friction stir lap welding显示文摘Stationary shoulder friction stir lap welding(SSFSLW) was employed to weld 2024 aluminum alloy. A coupled Eulerian-Lagrangian(CEL) model was developed to investigate the lap interface behavior during SSFSLW. Numerical results of material movement and equivalent plastic strain were in good agreement with the experimental work. With increasing welding speed, the distances from the hook tip to the top surface of the upper workpiece on the retreating side(RS) and the advancing side(AS) increase, while the distance between two wave-shaped alclads decreases. A symmetric interface bending is observed on the AS and the RS during plunging, while the interface bending on the AS is bigger than that on the RS during welding. The peak temperature of the interface on the AS is higher than that on the RS. The equivalent plastic strain gradually increases as the distance to the weld center decreases, and its peak value is obtained near the bottom of the weld. | Q.Wen W.Y.Li W.B.Wang F.F.Wang Y.J.Gao V.Patel | 2019 | Journal of Materials Science & Technology2019，35，1： | 4 |
| 3 | On the double-side probeless friction stir spot welding of AA2198 Al-Li alloy显示文摘Double-side probeless friction stir spot welding (DP-FSSW) of AA2198 alloy was conducted to investigate the microstructure and mechanical properties. Compared with common single-side probeless friction stir spot welding (P-FSSW), the plastic strain during DP-FSSW is nearly symmetrical with respect to the bondline to suppress the extension of hook defect, which is detrimental to the joint mechanical strength. With DP-FSSW, a fully metallurgically bonded region has formed due to severe plastic deformation at high temperatures. Tensile/shear tests show that the joint strength could exceed 8 kN, which is comparable to P-FSSW and refill FSSW, and all fractures happen in a shear failure mode as cracks extend along the in terface of two sheets. The microhard ness profile exhibits a uniform distribution along the thick ness direction, in which the hook defect shows the lowest value. | Q.Chu W.Y.Li H.L.Hou X.W.Yang A.Vairis C.Wang W.B.Wang | 2019 | Journal of Materials Science & Technology2019，35，5： | 3 |
| 4 | Tensile and cyclic deformation response of friction-stir-welded dissimilar aluminum alloy joints:Strain localization effect显示文摘Cyclic deformation behavior of friction-stir-welded dissimilar AA2024-T351 to AA7075-T65 aluminum alloy joints was evaluated via stepwise tests at different strain rates,along with transmission electron microscopy examinations to characterize the precipitates required to assess internal stresses.Electron backscatter diffraction was employed to observe the inhomogeneous microstructures of the FSWed joints.Strain localization appeared in the heat affected zone(HAZ)of AA2024 side.After cyclic deformation of 500 cycles at a total strain amplitude of 0.5%,the strength of the dissimilar joints resumed basically to that of AA2024 base material.And the AA2024 HAZ was obviously hardened,which should be attributed to the introduced dislocations during cyclic deformation process.Cyclic hardening capacity of the joints increased with decreasing strain rate. | P.L.Niu W.Y.Li D.L.Chen | 2021 | Journal of Materials Science & Technology2021，，14： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员