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7256 |
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Thursday, May 05, 2022, Hall D 5:00 PM Cold Gas Spraying II |
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A novel method for additive manufacturing of 2195 aluminum-lithium alloy by solid-state cold spraying |
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Wenya Li / Northwestern Polytechnical University, P.R. China Dong Wu* / Northwestern Polytechnical University, P. R. China Kun Liu/ Northwestern Polytechnical University, P.R. China Wenpeng Wan/ Northwestern Polytechnical University, China Zhonggang Sun/ Nanjing Tech University, China Zhiwei Qi/ Northwestern Polytechnical University, China Xiawei Yang/ Northwestern Polytechnical University, China Yaxin Xu/ Northwestern Polytechnical University, China |
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In this study, solid-state cold spray additive manufacturing (CSAM) was used for the first time to deposit 2195 Al-Cu-Li alloy. The results showed that a dense deposit with a porosity of 0.25vol.% was obtained. The CSAM maintained the microstructure and mechanical property of the as-received Al-Cu-Li alloy powder. The size and content of the precipitates in the deposit were almost the same as those of the powder, and the grain size was also similar to the as-received powder except that the grains at the powder boundary were locally refined. The deposit exhibited high tensile strength (191.7MPa), but almost no plasticity. Annealing and aging were used to modify the microstructure and mechanical properties of the deposit. After 20hrs of aging treatment, the size and content of Guinier-Preston zones and ?'/?' precipitates reached the peak. All the results showed the excellent aluminum-lithium alloy bulk could be produced by the CSAM and the subsequent heat treatment. |