thermomechanical material testing machine

材料热机械试验机

• 批准号: 468811222
• 金额: --
• 依托单位: Rheinisch-Westfälische Technische Hochschule Aachen
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2022
• 资助国家: 德国
• 起止时间: 2021-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/468811222?language=en
• 关键词: thermomechanical; material; testing; machine

The main focus of the Institute for Material Applications in Mechanical Engineering (IWM) is the research of the relationships between the manufacturing process, the material microstructure and the macroscopically measurable manufacturing and usage properties of materials, material composites and components. A main focus of interest is powder based primary forming processes, in particular innovative processes of additive manufacturing technology, as well as the heat treatment of metallic materials. In terms of properties, the IWM is particularly concerned with material fatigue at ambient and high temperatures and with fracture mechanics. The IWM has built up special competence with the multi-scale, numerical simulation of processes and failure sequences. It has proven to be particularly advantageous that the model parameters for the deformation and damage models developed or used can largely be determined experimentally in our own laboratory and that the simulation results can be verified experimentally.The device applied for is best classified as a thermomechanical material testing machine. The principle of combining a hydraulic material testing machine with direct heating of the sample by conducting electricity through it is unique and known simply as "Gleeble" in professional circles. This enables simultaneous, independent and precise control of temperature and mechanical parameters such as mechanical stress or strain. The resistive heating enables very high heating rates (up to 10,000 K/s) with a very homogeneous temperature distribution over the cross section. With hollow specimens cooled from the inside, high cooling rates are also possible. Measurements into the molten state are possible. Together, they give the device enormous flexibility.The device applied for would fill an important gap and enable thermomechanical material characterization in areas that were previously not possible to reach, but need to be covered for future research questions. With extremely high heating and cooling rates while ensuring a homogeneous temperature distribution, processes such as inductive hardening, grinding and welding as well as some additive manufacturing processes can be simulated and mechanical parameters can be determined. The device applied for will be used both for the determination of basic mechanical parameters for simulations and for the experimental verification of the results of the simulations. The ICME methodology is used to develop digital twins and digital shadows for processes, materials and components. As a result, the entire process chain is described virtually and the material and component properties are determined in great detail (digital twin). For additive manufacturing of metals, we hope to gain extensive knowledge about microstructure formation and damage mechanisms during the process.

机械工程材料应用研究所（IWM）的主要重点是研究制造工艺，材料微观结构和材料，材料复合材料和部件的宏观可测量制造和使用性能之间的关系。主要关注点是基于粉末的初步成型工艺，特别是增材制造技术的创新工艺，以及金属材料的热处理。在性能方面，IWM特别关注环境和高温下的材料疲劳以及断裂力学。IWM已经建立了多尺度的过程和故障序列的数值模拟的特殊能力。已经证明特别有利的是，所开发或使用的变形和损伤模型的模型参数可以在我们自己的实验室中通过实验确定，并且模拟结果可以通过实验验证。所申请的设备最好归类为热机械材料试验机。将液压材料试验机与通过其导电直接加热样品相结合的原理是独特的，在专业界被简称为“Gleeble”。这使得能够同时、独立和精确地控制温度和机械参数，例如机械应力或应变。电阻加热可实现非常高的加热速率（高达10，000 K/s），并在横截面上实现非常均匀的温度分布。对于从内部冷却的中空试样，也可以实现高冷却速率。测量熔融状态是可能的。这两项技术共同赋予了该设备巨大的灵活性。申请的设备将填补一个重要的空白，并使热机械材料表征在以前无法达到的领域成为可能，但需要在未来的研究问题中加以解决。通过极高的加热和冷却速率，同时确保均匀的温度分布，可以模拟感应淬火、磨削和焊接等工艺以及一些增材制造工艺，并确定机械参数。所申请的器械将用于确定模拟的基本机械参数和模拟结果的实验验证。ICME方法用于为工艺、材料和组件开发数字孪生和数字阴影。因此，整个工艺链都被虚拟化描述，材料和部件属性也被非常详细地确定（数字孪生）。对于金属的增材制造，我们希望获得有关过程中微观结构形成和损伤机制的广泛知识。