Effects of Deposition Strategy and Preheating Temperature on Thermo-Mechanical Characteristics of Inconel 718 Super-Alloy Deposited on AISI 1045 Substrate Using a DED Process.
Effects of Deposition Strategy and Preheating Temperature on Thermo-Mechanical Characteristics of Inconel 718 Super-Alloy Deposited on AISI 1045 Substrate Using a DED Process.
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DOI：
10.3390/ma14071794
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发表时间：
2021-04-05
期刊：
影响因子：
--
通讯作者：
Lee H
中科院分区：
文献类型：
--
作者：
Kim H;Lee KK;Ahn DG;Lee H
热机械特性高度依赖于定向能量沉积（DED）工艺的沉积策略，包括沉积路径、道次间时间、沉积体积等，以及衬底的预热条件。本文旨在研究沉积策略和预热温度对Inconel 718高温合金沉积在AISI 1045基底上的热机械特性的影响，通过有限元分析（FEAs）使用DED过程。不同的沉积策略和预热温度的有限元模型被创建来检查热机械行为。采用十六种沉积策略进行有限元分析。热沉系数估计从实验和有限元分析的温度历史的比较，以获得适当的有限元模型。在小体积沉积的设计模型上的残余应力分布的沉积策略的影响进行检查，以确定可行的沉积策略。此外，沉积策略和预热温度对大体积沉积设计的零件的残余应力分布的影响进行了研究，以预测一个合适的沉积策略的DED头和适当的基板预热温度。
Thermomechanical characteristics are highly dependent on the deposition strategy of the directed energy deposition (DED) process, including the deposition path, the interpass time, the deposition volume, etc., as well as the preheating condition of the substrate. This paper aims to investigate the effects of the deposition strategy and the preheating temperature on thermomechanical characteristics of Inconel 718 super-alloy deposited on an AISI 1045 substrate using a DED process via finite element analyses (FEAs). FE models for different deposition strategies and preheating temperatures are created to examine the thermomechanical behavior. Sixteen deposition strategies are adopted to perform FEAs. The heat sink coefficient is estimated from a comparison of temperature histories of experiments and those of FEAs to obtain appropriate FE models. The influence of deposition strategies on residual stress distributions in the designed model for a small volume deposition is examined to determine feasible deposition strategies. In addition, the effects of the deposition strategy and the preheating temperature on residual stress distributions of the designed part for large volume deposition are investigated to predict a suitable deposition strategy of the DED head and appropriate preheating temperature of the substrate.
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DOI：
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发表时间：
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影响因子：
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