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Electron beam multi step and multi process technologies for local materials engineering of magnesium alloys for a load related modification of surface properties (EB-MeMaRa)

用于镁合金局部材料工程的电子束多步骤和多工艺技术，用于与负载相关的表面性能改性（EB-MeMaRa）

基本信息

批准号：
170232691
负责人：
Professorin Dr.-Ing. Anja Buchwalder
金额：
--
依托单位：
Institut für Werkstofftechnik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/170232691?language=en
关键词：
Electron beam multi step process

项目摘要

The custom-designed protection of Mg alloys against wear and corrosion is an urgent demand to extend the application fields of these advantageous light weight construction materials. Electron beam (EB) multi-step and multi-process technologies are excellently suitable for a local materials engineering regarding the load specific modification and optimization of surface properties. These effects in their entirety are realizable only by means of EB surface technologies using flexible process steps in connection with suitable thermal cycles and conditions of vacuum.The aim of the requested research project EB-MeMaRa is the establishment of scientific fundamentals for the generation of graded surface layers on Mg materials exhibiting increased stability against corrosion and wear. Basing on the positive results of the first project period within the scope of the follow-up application the interactions between EB and material will be extensively investigated using selected combinations of substrate and additional. The effects of process parameters on structure and properties will be researched to provide fundamental contributions for the process background.The reference material is the basic alloy AZ91 and as additive materials the alloys AlSi12 and AlSi30 are used for EB alloying (EBA), the combination of AlSi30+TiC is used for EB dispersion alloying (EBDA). For both technologies the additive materials are applied as wires and/or powders being deposited by means of arc plasma spraying (APS).The main point of interest are investigations into the wear and corrosion behavior of selected defect-free alloyed layers and dispersion alloyed layers showing novel structural features (e.g. supersaturated phases, intermetallic compounds, grain size and distribution of hard particles).Compared with the previous project the extended and new available measurement methods like a self-made hydrogen measuring probe as well as a new pin-on-disc tribometer contribute to an extended investigation of the acting wear and corrosion mechanism to define and generate optimal layer configurations.A successful realization of the requested project provides a contribution for the generation of significant requirements for a comprehensive industrial application of Mg light weight construction materials.

定制设计的镁合金抗磨损和腐蚀的保护是扩展这些有利的轻质建筑材料的应用领域的迫切需求。电子束（EB）多步骤和多工艺技术非常适合于局部材料工程，涉及负载特定的改性和表面性能的优化。这些效果只有通过电子束表面技术，使用灵活的工艺步骤，结合合适的热循环和真空条件才能实现。EB-MeMaRa研究项目的目的是建立在镁材料上生成梯度表面层的科学基础，从而提高耐腐蚀和磨损的稳定性。基于第一个项目周期在后续应用范围内的积极结果，将使用选定的基质和附加物组合广泛研究EB和材料之间的相互作用。本文以AZ 91合金为基础材料，以AlSi 12和AlSi 30合金为添加剂，采用EB合金化（EBA）工艺，以AlSi 30 +TiC合金为添加剂，研究了EB弥散合金化（EBDA）工艺参数对合金组织和性能的影响。这两种技术的添加剂材料都是通过电弧等离子喷涂（APS）以丝材和/或粉末的形式施加的，主要研究了所选无缺陷合金层和弥散合金层的磨损和腐蚀行为，这些合金层具有新颖的结构特征（例如过饱和相，金属间化合物，硬质颗粒的粒度和分布）。与以前的项目相比，扩展和新的可用测量方法，如自制造了氢测量探头，以及一种新的针-盘式摩擦磨损试验机的研制，有助于深入研究镁合金的磨损和腐蚀机理，确定并生成最佳的涂层结构，为镁合金的工业应用提供了重要的技术支持建筑材料。