| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7915968 | Cryogenics | 2015 | 26 Pages |
Abstract
The part-through fracture toughness (KIe) and crack-tip opening displacement (CTOD, δm) of welded joints of aluminum alloy (AA) 20l4-T6, including the weld metal, the fusion zone (FZ), the heat-affected zone (HAZ), and the base material, were investigated at both liquid nitrogen temperature and liquid helium temperature with surface-crack tension (SCT) specimen and single-edge-notched bend (SENB) specimen respectively. Results indicate a conventional fusion welding process leads to formation of second-phase precipitations and inclusions, which cause significant reduction of fracture resistance at the weld metal and the FZ by fractographic analyses of fractured surface.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Qinyan Pan, Chuanjun Huang, Laifeng Li,