Morphologies,microstructures, and mechanical properties of samples produced using laser metal deposition with 316 L stainless steel wire |
| |
| Institution: | 1. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;1. The State Key Laboratory of Tribology, Beijing 100084, China;2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;1. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, China;2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, China;1. Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061, PR China;2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, Ministry of Education, PR China;3. Shandong Mining Machinery Group Co., Ltd., PR China |
| |
| Abstract: | Laser metal deposition (LMD) with a filler has been demonstrated to be an effective method for additive manufacturing because of its high material deposition efficiency, improved surface quality, reduced material wastage, and cleaner process environment without metal dust pollution. In this study, single beads and samples with ten layers were successfully deposited on a 316 L stainless steel surface under optimized conditions using a 4000 W continuous wave fibre laser and an arc welding machine. The results showed that satisfactory layered samples with a large deposition height and smooth side surface could be achieved under appropriate parameters. The uniform structures had fine cellular and network austenite grains with good metallurgical bonding between layers, showing an austenite solidification mode. Precipitated ferrite at the grain boundaries showed a subgrain structure with fine uniform grain size. A higher microhardness (205–226 HV) was detected in the middle of the deposition area, while the tensile strength of the 50 layer sample reached 669 MPa. In addition, ductile fracturing was proven by the emergence of obvious dimples at the fracture surface. |
| |
| Keywords: | Laser metal deposition Microstructure Mechanical properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
