In this study, a novel heterogeneous double-wire arc additive manufacturing method was used for the in-situ synthesis of a novel Ti-Ni-Al-V alloy wall. The results indicated that the synthesis wall was composed of the NiTi, B, and NiTi phases from the bottom to the top. With an increase in deposition layers, the Ti2Ni content decreased. The hardness at the bottom was ∼685.4 HV, while that of the middle and stable regions was 553 HV. The maximum compressive strength was 2100 MPa. The fracture morphology was brittle. After cyclic compression, the recoverable and unrecoverable strains were 4.79 % and 1.21 %, respectively, indicating excellent recovery characteristics.
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http://dx.doi.org/10.1016/j.heliyon.2024.e24347 | DOI Listing |
Materials (Basel)
December 2024
Joining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan.
Narrow-gap arc welding is an efficient method that significantly enhances industrial production efficiency and reduces costs. This study investigates the application of low-alloy steel wire EG70-G in narrow-gap gas metal arc welding (GMAW) on thick plates. Experimental observations were made to examine the arc behavior, droplet transition behavior, and weld formation characteristics of double-wire welding under various process parameters.
View Article and Find Full Text PDFToxicol Rep
December 2024
Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, United States.
Unlabelled: Thermal spray, in general, is a process that involves forcing a melted substance, such as metal or ceramic in the form of wire or powder, onto the surface of a targeted object to enhance its desired surface properties. In this paper, the melted substance is metal wire generated by an electric arc and forcibly coated on a rotary iron substrate using compressed air. This thermal process is referred to as double-wire arc thermal spray.
View Article and Find Full Text PDF3D Print Addit Manuf
June 2024
Advanced Materials Processing and Manufacturing Research Institute, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, China.
In this study, NiTi shape memory alloy was prepared by double-wire + arc additive manufacturing plus heat treatment using TA1 and ER-Ni welding wires as the raw materials. The results show that the microstructural evolution from the bottom to top is NiTi + NiTi → NiTi + NiTi + NiTi → NiTi + NiTi + NiTi + NiTi + α-Ti. Complex thermal cycles led to the precipitation of NiTi, which improves the hardness of the matrix (B2), and the average hardness value of the top region reaches 550.
View Article and Find Full Text PDFHeliyon
January 2024
School of Automobile Engineering, Changshu Institute of Technology, Suzhou 215506, China.
In this study, a novel heterogeneous double-wire arc additive manufacturing method was used for the in-situ synthesis of a novel Ti-Ni-Al-V alloy wall. The results indicated that the synthesis wall was composed of the NiTi, B, and NiTi phases from the bottom to the top. With an increase in deposition layers, the Ti2Ni content decreased.
View Article and Find Full Text PDF3D Print Addit Manuf
August 2023
Guangdong Polytechnic Normal University, Guangzhou, China.
Serious heat accumulation causes poor properties and anisotropy of products in wire and arc additive manufacturing, which restricts the further efficiency in application, especially in double-wire and double-arc depositions. Consequently, this study applied an auxiliary gas process in double-arc additive manufacturing and then compared two 50-layer depositions in morphology, microstructure, and properties to research the influence of the auxiliary process on the forming and performance. The results showed that the auxiliary gas process could improve the deposition morphology, and the efficiency was increased by 24%; moreover, the surface roughness was reduced.
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