High deposition rate wire-arc directed energy deposition of 316L and 316LSi: Process exploration and modelling
High deposition rate wire-arc directed energy deposition of 316L and 316LSi: Process exploration and modelling
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316L 和 316LSi 的高沉积速率线弧定向能量沉积：工艺探索和建模
DOI：
10.1016/j.msea.2023.145044
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Klemm-Toole, Jonah
中科院分区：
文献类型：
--
作者：
Hagen, Luc;Yu, Zhenzhen;Clarke, Amy;Clarke, Kester;Tate, Stephen;Petrella, Anthony;Klemm-Toole, Jonah
采用参数设计的方法，研究了焊丝中硅含量、焊接速度和层间温度对316L不锈钢高速焊丝电弧定向能沉积(WA-DED)组织和性能的影响。使用高沉积速率脉冲喷雾传输模式构建了小规模、具有代表性的建筑。在各种条件下，WA-DED 316L构件超过了美国机械工程师协会(ASME)SA-240在室温下的屈服强度、伸长率和拉伸强度的最小值，并进行了平行和垂直于构建方向的测试。结果表明，316LSi(高硅版本316L)的强度和塑性显著高于316L的样品，而焊接速度和层间温度的影响不大。建立了WA-DED过程的传热模型，以支持微观组织预测。利用红外热像仪对多层膜沉积过程中的定点温度进行测量，对模型进行了标定。开发了凝固模型，以预测竣工条件下的微观结构特征。对枝晶间距和生长形态的预测与实验结果吻合较好，证明了模拟WA-DED参数对工艺优化的影响的潜力。根据金相组织分析，316LSi与316L相比，强度和塑性的提高是由于成分对固溶强化和层错能的影响，这为开发新的用于WA-DED的不锈钢合金提供了机会。
A parameter design of experiments was undertaken to study the impact of Si content in the wire feedstock, weld speed, and interpass temperature on the microstructure and mechanical properties of high deposition rate Wire-Arc Directed Energy Deposition (WA-DED) of 316L stainless steel. Small-scale, representative builds were constructed using a high deposition rate pulsed spray transfer mode. Across conditions, WA-DED 316L builds exceeded American Society of Mechanical Engineers (ASME) SA-240 minimum values for yield strength, elongation, and tensile strength at room temperature, tested both parallel and perpendicular to the build direction. It was found that 316LSi samples (higher Si content version of 316L) displayed significantly higher strengths and ductilities than samples produced with 316L, while the impact of weld speed and interpass temperature were less significant. A heat transfer model of the WA-DED process was created to allow for microstructure predictions. An infrared thermal camera system was used to calibrate this model by taking temperature measurements at fixed points during the deposition of several layers. Solidification models were developed to allow for predictions of microstructural features in the as-built condition. Predictions of dendrite spacings and growth morphologies show good agreement with experiments, demonstrating the potential for modeling the influences of the WA-DED parameters for process optimization. Based on microstructural analysis, it was concluded that the increase in strength and ductility in 316LSi compared to 316L is due to effects of composition on solid solution strengthening and stacking fault energy, suggesting opportunities for developing new stainless steel alloys for WA-DED with improved mechanical performance.
液氮在线冷却对电弧定向能量沉积316L不锈钢显微组织和力学性能的影响
影响因子：
3
作者：
Cunningham C
通讯作者：
Cunningham C