Understanding the high-temperature behavior of alloys designed for additive manufacturing

该项目旨在利用Gleeble 563热机械模拟器和定制的高温Split-Hopkinson压力棒（SHPB）机器，确定用于增材制造（AM）的新型商用铁基合金M789和Corrax不锈钢的准静态和动态力学行为。增材制造的钢样品具有优异的抗拉强度和耐腐蚀性，将由奥钢联增材制造中心（vAMC）提供。经过大量的高温实验，将使用定制的数据分析应用程序（Simu-Mat 1.0）来确定推荐的经验、半经验和机器学习本构模型。一旦定义了合适的模型（专注于经验和半经验），这些模型将被纳入有限元分析，使用ANSYS或ABAQUS来准确模拟M789和Corrax不锈钢在不同温度和应变速率下的机械响应。此外，还将进行显微组织分析，以建立这些新型商用合金的加工-显微组织-性能-性能关系。该项目的实验和模拟工作将有助于防止与在用增材制造组件相关的材料问题，确定其他行业应用，并使组件认证过程更容易实现。这项工作的成果将有助于vAMC在合金开发方面的研究和开发活动，以实现持续的可持续性。三名学生将接受增材制造技术、准静态和动态力学测试、微观结构分析和数值建模方面的培训，以解决金属增材制造领域高技能人才的短缺问题。

The proposed project aims to determine the quasi-static and dynamic mechanical behavior of new commercial iron-based alloys, M789 and Corrax stainless steels, designed for additive manufacturing (AM) using a Gleeble 563 thermomechanical simulator and a customized high-temperature Split-Hopkinson Pressure Bar (SHPB) machine. The additively manufactured steel samples, known to possess an excellent combination of tensile strength and corrosion resistance, will be supplied by voestalpine Additive Manufacturing Center (vAMC). After extensive high-temperature experiments, a custom-built data analysis application (Simu-Mat 1.0) will be employed to determine the recommended empirical, semi-empirical, and machine learning constitutive models. Once the suitable models have been defined (focusing on empirical and semi-empirical), these will be incorporated in finite element analysis using ANSYS or ABAQUS to accurately simulate M789 and Corrax stainless steels' mechanical response at various temperatures and strain rates. Microstructural analysis will also be conducted to establish the processing-microstructure-property-performance relationships in these new commercial alloys. The combined experimental and simulation work from this project will help prevent material issues associated with in-service AM components, identify additional industry applications, and make the component certification process more achievable. This work's output will assist the research and development activities of vAMC in alloy development for continuous sustainability. Three students will be trained in AM technology, quasi-static and dynamic mechanical testing, microstructural analysis, and numerical modeling to address the shortage of highly skilled talent in the metal additive manufacturing community.