Effect of Deposition Rate on Microstructure and Properties of GWZ932 Alloy Wire Arc Additive Manufactured Thin-Walled Components
Wire arc additive manufacturing(WAAM),as a novel rapid prototyping technology,can be applied to fabricate high-mechanical-property components with complex shape.Thin-walled components of GWZ932 alloy were fabricated by WAAM based on cold metal transfer(WAAM-CMT)with different deposition rates,and the microstructure evolution and mechanical properties were studied.The results show that as the deposition rate increases from 4.5 mm/s to 7.5 mm/s,the average height and width of deposition layers both decrease.The reduction of heat input also leads to significant grain refinement.At the deposition rate of 6 mm/s,the alloy shows the best mechanical properties,with the yield strength,tensile strength,and elongation of 161 MPa,236 MPa,and 4.5%,respectively.The mechanical properties exhibit isotropy,and the fracture surface shows obvious characteristics of brittle fracture.
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