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- W2912793326 abstract "The GH4738 alloy is widely applied in different industries due to excellent strength and toughness matching stability and a low crack propagation rate. There are several welding methods used in GH4738 alloy. In order to increase the demand for high speed and low distortion welding, electron beam welding is introduced into jointing engineering pieces. The purpose of this study was to evaluate the effect of electron beam welding parameters (welding speed and beam current) on macroscopic morphology, the room temperature tensile properties, microstructure and microhardness of GH4738 alloy. According to the macroscopic morphology, there is a very narrow heat-affected zone during electron beam welding process. By analyzing microstructure, it could be concluded that the great temperature gradient in the small weld zone provides favorable conditions for the growth of the columnar crystal. Furthermore, the value of microhardness in the weld area is far lower than the value of microhardness in the base metal, especially in heat-affected zone. Eventually, according to these results, optimum electron beam welding parameters is selected. When the welding speed is 20 mm/s and beam current is 33 mA, there is more compact macroscopic morphology and better mechanical properties in the weldment and the hot affecting zone is narrow. What’s more, the microhardness and the room tensile strength of weldments are excellent after heat treatment." @default.
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- W2912793326 date "2019-01-01" @default.
- W2912793326 modified "2023-09-28" @default.
- W2912793326 title "The Effects of Electron Beam Welding Parameters on Microstructure and Properties of GH4738 Alloy" @default.
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- W2912793326 doi "https://doi.org/10.1007/978-981-13-5944-6_13" @default.
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