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）的主要重点是研究材料、材料复合材料和部件的制造过程、材料微观结构与宏观可测量的制造和使用性能之间的关系。主要关注粉末初级成形工艺，特别是增材制造技术的创新工艺，以及金属材料的热处理。就性能而言，IWM特别关注材料在环境和高温下的疲劳以及断裂力学。该模型在多尺度、过程和失效序列的数值模拟方面具有独特的能力。事实证明，我们开发或使用的变形和损伤模型的模型参数在很大程度上可以在我们自己的实验室实验确定，并且模拟结果可以在实验中得到验证，这是特别有利的。本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试样相结合的原理是独一无二的，在专业圈内简称为“Gleeble”。这样可以同时，独立和精确地控制温度和机械参数，如机械应力或应变。电阻加热可以实现非常高的加热速率（高达10,000 K/s），并且在截面上具有非常均匀的温度分布。空心试样从内部冷却，高冷却速率也是可能的。对熔融状态的测量是可能的。它们共同赋予了设备巨大的灵活性。所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不可能达到的领域，但需要覆盖未来的研究问题。在确保均匀温度分布的同时，具有极高的加热和冷却速率，可以模拟感应硬化、磨削和焊接等过程以及一些增材制造过程，并可以确定机械参数。所申请的设备将用于确定模拟的基本机械参数，并用于模拟结果的实验验证。ICME方法用于开发工艺、材料和组件的数字孪生和数字阴影。因此，整个工艺链被虚拟地描述，材料和组件的特性被非常详细地确定（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。