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The effect of homogenization temperature on the microstructure and high temperature mechanical performance of SLM-fabricated IN718 alloy

机译：均匀化温度对SLM制造的组织和高温机械性能的影响。

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摘要

Microstructure, mechanical performances at elevated temperature (650 °C) and their correlation of Inconel 718 manufactured by Selective Laser Melting (SLM) were investigated in this paper. Four kinds of heat treatment schemes including homogenization, solution treatment and conventional aging process were carried out to regulate the microstructure in order to obtain the optimum comprehensive mechanical performances at high temperature. The dimension and morphology of grains, subgrains, different precipitates including fi phase, strengthening phase, carbides and nitrides were investigated. In addition, their evolution mechanism was also analyzed in detail. Furthermore, for figuring out the effects of microstructures on the mechanical performance, creep rupture test and tensile test were carried out to compare the performance differences of heat-treated samples. The results demonstrated that the heat-treated samples show the better creep rupture performance and higher tensile strength at elevated temperature than that of the wrought. In addition, the sample under homogenization heat treatment in 1080 °C, solution treatment in 980 °C and conventional aging treatment shows the optimum mechanical properties at 650°C.
机译：本文研究了升高温度（650℃）的机械性能及其通过选择性激光熔化（SLM）制造的Inconel 718的相关性。进行了四种热处理方案，包括均质化，溶液处理和常规老化过程以调节微观结构，以便在高温下获得最佳的综合机械性能。研究了晶粒，亚甲，不同沉淀物的粒度和形态，包括固相，强化相，碳化物和氮化物。此外，还详细分析了它们的进化机制。此外，为了确定微观结构对机械性能的影响，进行了蠕变破裂测试和拉伸试验，以比较热处理样品的性能差异。结果表明，热处理的样品显示出比锻造的升高温度更好的蠕变破裂性能和更高的拉伸强度。另外，在1080℃下均化热处理的样品，980℃和常规老化处理中的溶液处理显示650℃的最佳机械性能。

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  • 来源
    《Materials Science and Engineering》 |2021年第13期|140427.1-140427.14|共14页
  • 作者

    Ming Cao; Dongyun Zhang; Yang Gao; Runping Chen; Guoliang Huang; Zhe Feng; Reinhart Poprawe; Johannes Henrich Schleifenbaum; Stephan Ziegler;

  • 作者单位

    Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Pingleyuan No. 100 Chaoyang Dist Beijing 100124 China Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing China;

    Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Pingleyuan No. 100 Chaoyang Dist Beijing 100124 China Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing China;

    Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Pingleyuan No. 100 Chaoyang Dist Beijing 100124 China Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing China;

    Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Pingleyuan No. 100 Chaoyang Dist Beijing 100124 China Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing China;

    Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Pingleyuan No. 100 Chaoyang Dist Beijing 100124 China Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing China;

    Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Pingleyuan No. 100 Chaoyang Dist Beijing 100124 China Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing China;

    Fraunhofer Institute for Laser Technology ILT Aachen Germany;

    Fraunhofer Institute for Laser Technology ILT Aachen Germany RWTH Aachen University - Digital Additive Production (DAP) Aachen Germany;

    RWTH Aachen University - Digital Additive Production (DAP) Aachen Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Selective laser melting; Inconel 718; High temperature mechanical performances; 8 phase; Strengthening phases;

    机译：选择性激光熔化;Inconel 718;高温机械性能;8阶段;加强阶段;

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