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Hybrid ultrafine grained materials produced by high pressure torsion extrusion

高压扭转挤压生产的混合超细晶材料

基本信息

批准号：
353142053
负责人：
Professor Dr.-Ing. Horst Hahn
金额：
--
依托单位：
Department of Materials Science and Engineering
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/353142053?language=en
关键词：
Hybrid ultrafine grained materials produced

项目摘要

We propose to develop a scientific approach for the synthesis of new hybrid ultrafine-grained materials with high strength and ductility on the base of a newly developed severe plastic deformation (SPD) processing technique, referred to as High Pressure Torsion Extrusion (HPTE). Such hybrid materials are metal-based composites comprised of two or more constituents. Their properties are crucially determined by the inner architecture, achieved by HPTE processing along with concurrent nanostructuring. Architecturing means processing of gradient materials, i.e. materials with modified microstructure (and sometimes, phase composition) in particular areas of the sample, and/or introduction of structural elements (reinforcements) with specially designed shape. There is every reason to expect that these materials will possess outstanding mechanical, physical and functional properties, which is of crucial relevance for engineering applications in terms of reliability and lifetime issues. As model materials pure copper, Cu-Ag and Al alloys as well as plain carbon steel will be used to demonstrate various kinds of inner specimen architectures. The experimental work on the processing, structure and mechanical properties will be complemented by numerical simulations. Besides the measurements of mechanical properties of hybrid materials, the details of their structure will be determined by using XRD, EBSD/SEM, as well as conventional and analytic TEM. As a result of the project innovative processing techniques can be expected. Further close cooperation with universities in Melbourne (Australia, theory of nanostructured hybrid materials), Metz (France, microstructure simulations) und Donetsk (Ukraine, mechanical properties simulations) round up the proposed work.

我们提出了一种基于最新发展的大塑性变形(SPD)加工技术--高压扭转挤压(HPTE)的科学方法，以合成高强度和高塑性的新型混杂超细晶材料。这种混杂材料是由两种或两种以上成分组成的金属基复合材料。它们的性能关键是由内部结构决定的，这是通过HPTE工艺和并行纳米结构实现的。建筑是指处理梯度材料，即在样品的特定区域具有修改的微观结构(有时，相组成)的材料，和/或引入具有特殊设计形状的结构元素(增强体)。我们完全有理由期待这些材料将具有突出的机械、物理和功能特性，这在可靠性和寿命问题上对工程应用具有至关重要的意义。作为模型材料，将使用纯铜、铜-银和铝合金以及普通碳钢来演示各种内部试件结构。在工艺、组织和力学性能方面的实验工作将得到数值模拟的补充。除了测试杂化材料的力学性能外，还将通过X射线衍射仪、EBSD/SEM以及常规和分析电子显微镜来确定其结构细节。作为该项目的结果，创新的加工技术是可以预期的。与墨尔本(澳大利亚，纳米结构混合材料理论)、梅茨(法国，微观结构模拟)和顿涅茨克(乌克兰，机械性能模拟)的大学进一步密切合作，完成了拟议的工作。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Evolution of microstructure and hardness in aluminum processed by High Pressure Torsion Extrusion

DOI：
10.1016/j.msea.2019.138074
发表时间：
2019-08-05
期刊：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
影响因子：
6.4
作者：
Omranpour, Babak;Ivanisenko, Yulia;Gubicza, Jeno
通讯作者：
Gubicza, Jeno

Modelling of High Pressure Torsion using FEM