|
|
|
| Research on Mechanical Properties of Selective Laser Melting/Coaxial Powder Feeding Forming Connection |
| XUAN Minghao, ZHANG Rui, XING Bendong, WANG Xiangming |
| ( AVIC Shenyang Aircraft Design ＆ Research Institute, Shenyang 110035, China ) |
|
|
|
|
Abstract The tensile and fatigue properties of TC4 selective laser melting/coaxial powder feeding forming joints were studied. By comparing the tensile test data under different linear energy density parameters, the influence of linear energy density on the tensile properties of TC4 formed joints was obtained. By comparing the median fatigue life and fatigue limit of the formed joints and the base metal at the same stress level, the attenuation degree of the fatigue characteristics of the formed joints relative to the base metal is obtained. Equivalent Kt was used to characterize the fatigue properties of formed joints, and the equivalent stress concentration factor Kte of formed joints was obtained. Compared with the welding process, the forming connection process has better fatigue characteristics.
|
|
|
|
|
|
|
|
|
2021, 
