A5101668103- Welding Techniques and Residual Stresses
- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- High Entropy Alloys Studies
- Advanced Welding Techniques Analysis
- Erosion and Abrasive Machining
- Organic Electronics and Photovoltaics
- Surface Treatment and Residual Stress
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
Guangdong Polytechnic Normal University
2021-2024
State Key Laboratory of Vehicle NVH and Safety Technology
2021-2022
South China University of Technology
2018-2020
State Key Laboratory on Integrated Optoelectronics
2020
Jilin University
2020
Wire and arc additive manufacturing (WAAM) produces thin-walled parts superior to other methods, because of its high efficiency, good compactability, low cost. However, the WAAM accuracy is limited by large heat input. Here, 0.8 mm 316L stainless steel welding wire deposited via speed cold form 30-layered samples, with 2 thickness, up 65 height. The effects three process parameters (the bottom current mode, scanning speed, cooling time) on deposition stability, macro morphology, structure,...
Wire and arc additive manufacturing (WAAM) has advantages of high efficiency low cost. However, different welding current processes lead to heat input repeated heating treatment during the deposition process, which an influence on forming performance. In this study, 30 layers reciprocating depositions for 316L stainless steel were carried out by speed cold processes, morphology, effective rate per power, microstructure, properties compared. The outcomes indicated that make shaping...
Adopting the cold metal transfer plus pulse (CMT + P) process, 316L stainless steel wire was treated with a single channel multi-layer deposition experiment under different linear energy. The microstructures of regions on deposited samples were observed by optical microscope and scanning electron microscope, element distribution in structure analyzed energy dispersive spectrometer. mechanical properties microhardness measured tensile test method tester, respectively, anisotropy strength...
Arc additive manufacturing based on gas metal arc welding (GMAW) can decrease the cost and increase efficiency of large-sized components. In this paper, a double-arc process for stainless steel 316L (SS316L) GMAW that does not use more power than single-arc is proposed. addition, study compared single- processes by analyzing morphology, microstructure, mechanical properties. The results indicate with same power, deposition rate was 1.25 times higher process. Further, increased number wires...
Serious heat accumulation limits the further efficiency and application in additive manufacturing (AM). This study accordingly proposed a double-wire SS316L stainless steel arc AM with two-direction auxiliary gas process to research effect of three parameters, such as nozzle angle, flow rate nozzle-to-substrate distance on depositions, then based Box–Behnken Design response surface, regression equation between parameters total score were established optimized by an evaluation system. The...
The widespread adoption of arc additive manufacturing techniques across various industries has advanced the field SS316L stainless steel manufacturing. It is crucial to acknowledge that different welding modes exert distinct influences on forming and mechanical performance. This study analyzed thermal input associated with four specific in LORCH MIG welding, clarifying transition dynamics molten droplets through waveform analysis examining resultant effects microstructure performance...
To avoid humping bead defects in high-speed welding, this paper proposes the method of an additional and compensatory gas jet blow molten pool. A pulsed metal inert welding test platform was constructed for total 304 stainless steel sheets were used as workpieces under equal heat inputs. Two butt processes conducted compared, which welded with without jets at 154 cm/min 167 cm/min, respectively. After blow, weld appearance straight, uniform, high-quality, no or undercut defects. The...
To achieve a better understanding of the effect droplet impingement on weld profile and grain morphology, welding with vertical inclined torches in double pulsed-gas metal arc aluminum alloy were compared. When using welding, grains along wall finger-like penetration (FLP) refined by more violent flow driven running confined space created FLP. sharp inflection point disappeared curved columnar emerged non-impact action side, which was attributed to gradually weakened at that location....
Wire and arc additive manufacturing (WAAM) is usually for fabricating components due to its low equipment cost, high material utilization rate cladding efficiency. However, applications are limited by the large heat input decided process parameters. Here, four 50-layer stainless steel parts with double-pulse single-pulse metal inert gas (MIG) welding modes were deposited, effect of different duty ratios current on morphology, microstructure, performance was analyzed. The results demonstrate...
Functionally graded materials (FGMs) are a new type of composite capable facilitating the dependable bonding dissimilar materials. A double‐wire plasma welding process is used to manufacture Stainless steel 316 L (SS316L)/Inconel 625 FGM. Subsequently, two thin‐walled structures with 5% gradient and non‐gradient fabricated investigate morphology, microstructure, properties in different gradients, focusing on 67% SS316L region. In findings, it indicated that depositions exhibit well‐formed...
Serious heat accumulation causes poor properties and anisotropy of products in wire arc additive manufacturing, which restricts the further efficiency application, especially double-wire double-arc depositions. Consequently, this study applied an auxiliary gas process manufacturing then compared two 50-layer depositions morphology, microstructure, to research influence on forming performance. The results showed that could improve deposition was increased by 24%; moreover, surface roughness...
Double-wire arc additive manufacturing could manufacture large-sized components at low cost and high efficiency; however, serious heat input accumulation result in poor forming quality limit further efficiency application. An auxiliary gas process platform for double-wire is introduced this paper to explore the influence mechanism of on deposition during process. Monolayer multilayer test results showed that had a stirring effect liquid molten pool cooling layers, different parameters also...