Research on fatigue behavior of welded joint spraying fused by low transformation temperature alloy powder |
| |
| Affiliation: | 1. Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun 130025, China;2. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;1. Department of Civil Engineering, South China University of Technology, Guangzhou, China;2. School of Engineering, The University of Edinburgh, Edinburgh, Scotland, UK;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China;2. School of Engineering, Institute for Infrastructure and Environment, The University of Edinburgh, Edinburgh, Scotland, UK;3. Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China;1. Department of Polymer Engineering, Golestan University, Gorgan, Iran;2. Iran Polymer and Petrochemical Institute, Tehran, Iran;3. Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran;4. Department of Chemistry, Golestan University, Gorgan, Iran |
| |
| Abstract: | Modification of spraying fused (MSF) of plasma arc as heat source was used to improve the fatigue performance of welded joint, which both fundamentally reduced stress concentration at weld toe and achieved metallurgical bond between spraying fused coating and welding. The low transformation temperature alloy powder was applied to the method of MSF. After spraying fusion, especially spraying fused joint by low transformation temperature alloy powder, the distribution of residual stress is more difficult to be obtained. Finite element (FE) simulation as an important tool was used to determine the stress field and temperature field of spraying fused joint. Simulated results show that as-welded joint and welded joint spraying fused by conventional nickel base alloy powder (Conventional-joint) present tensile stress. The stress of welded joint spraying fused by low transformation temperature alloy powder (LTT-joint) is compressive stress. Fatigue test results indicated that under the condition of 2 × 106 cycles, the fatigue strength of as-welded joint is 135 MPa, while that of Conventional-joint and LTT-joint is 218 MPa and 235 MPa, respectively. The fatigue strength of Conventional-joint increases by 61.48%, and fatigue strength of LTT-joint increases by 74.07%. |
| |
| Keywords: | D Welded joint C Modification of spraying fused E Fatigue strength |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
