Mechanisms in Joining of Dissimilar Materials using Friction Stir Welding

使用搅拌摩擦焊连接异种材料的机理

• 批准号: 227616987
• 负责人: Professor Dr. Ferdinand Haider
• 金额: --
• 依托单位: Lehrstuhl für Betriebswissenschaften und Montagetechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/227616987?language=en
• 关键词: Mechanisms; Joining; Dissimilar; Materials; using

Friction Stir Welding (FSW) is an innovative joining technology. The process, which is driven by plas-tic deformation, can be divided into three phases: local plastification, mixture, and consolidation of the material. For this purpose, wear resistant tools are used. Due to the moderate temperatures of the weld seam, which are below the melting temperature of the joining partners, dissimilar materials can be joined. The general proof of principal is already supplied in the literature. Yet, fundamental knowledge about the mechanisms of the joining process as well as the influencing parameters on the joint quality is missing. These missing fundamentals prohibit a stress-related de-sign of a weld seam in FSW. The planned research project aims at the fundamental understanding of the metallographical process-es at the interface layer of FSW-joints of dissimilar materials. Analyses of the joining mechanisms of aluminum-titanium and aluminum-copper joints, which were welded in overlap- and butt-joint configura-tion, were carried out. Therefore, a fundamental knowledge of the joining mechanisms of friction stir welded dissimilar materials can be derived. This is the basis for modeling the (joining)processes at the interface layer of friction stir welded dissimilar joints. The effective joining mechanisms as well as the joint properties should now be made predictable using the gathered knowledge. By implementing a temperature control for the FSW of dissimilar joints, a stationary process behavior can be main-tained. Hence, the formation of the interface layer and the topography can be controlled for the first time. This directly influences the effective joining mechanisms and as a consequence the joint proper-ties. Furthermore, the numerical models of the second project phase have to be adapted and im-proved concerning the changed conditions of the temperature controlled FSW. Hereby, the limits for a robust FSW process for dissimilar materials can be defined. In addition, methods for non-destructive testing are analyzed regarding their ability to detect and quantify the shape of the interface area (interface layer, topography). This allows to verify the desired joint properties without destroying the welds.

搅拌摩擦焊（FSW）是一种创新的连接技术。该过程由塑性变形驱动，可分为三个阶段：材料的局部塑化、混合和固结。为此，使用耐磨工具。由于焊缝的温度适中，低于连接伙伴的熔化温度，因此可以连接不同的材料。在文献中已经提供了原理的一般证明。然而，关于连接过程的机制以及对接头质量的影响参数的基本知识是缺失的。这些缺失的基本原理禁止了FSW中焊缝的应力相关设计。计划中的研究项目旨在对异种材料FSW接头界面层的金相过程有基本的了解。对铝-钛和铝-铜搭接和对接接头的连接机理进行了分析。因此，可以得出一个基本的知识，搅拌摩擦焊接异种材料的连接机制。这是模拟搅拌摩擦焊异种接头界面层连接过程的基础。有效的连接机制，以及联合属性，现在应该是可预测的使用收集的知识。通过对异种接头的搅拌摩擦焊实施温度控制，可以保持稳定的工艺行为。因此，界面层的形成和形貌可以第一次被控制。这直接影响有效的连接机制，并因此连接性能。此外，第二个项目阶段的数值模型必须适应和改进有关的温控搅拌摩擦焊条件的变化。据此，可以定义用于不同材料的稳健FSW工艺的极限。此外，无损检测的方法进行了分析，关于他们的能力，检测和量化的界面区域（界面层，地形）的形状。这允许在不破坏焊缝的情况下验证所需的接头特性。

项目成果

Gaussian process regression to predict the morphology of friction-stir-welded aluminum/copper lap joints

• DOI: 10.1007/s00170-018-03229-1
• 发表时间: 2019-01
• 期刊: The International Journal of Advanced Manufacturing Technology
• 作者: M. Krutzlinger;E. Meltzer;M. Muehlegg;M. F. Zaeh

Friction stir welding of dissimilar metal joints

异种金属接头搅拌摩擦焊

• DOI: 10.1002/mawe.201900023
• 发表时间: 2019
• 期刊: Materialwissenschaft und Werkstofftechnik
• 影响因子: 1.1
• 作者: A. Zens;M. F. Zaeh;R. Marstatt;F. Haider
• 通讯作者: F. Haider

Formation of Joining Mechanisms in Friction Stir Welded Dissimilar Al-Ti Lap Joints

搅拌摩擦焊异种材料铝钛搭接接头机理的形成

• DOI: 10.4028/www.scientific.net/amr.966-967.510
• 发表时间: 2014
• 期刊: Advanced Materials Research
• 作者: M. Krutzlinger;R. Marstatt;S Suenger;J. Luderschmid;M. F. Zaeh;F. Haider
• 通讯作者: F. Haider

Intermetallic layers in temperature controlled Friction Stir Welding of dissimilar Al-Cu-joints

• DOI: 10.1088/1757-899x/373/1/012017
• 发表时间: 2018-06
• 期刊: IOP Conference Series: Materials Science and Engineering
• 作者: R. Marstatt;M. Krutzlinger;J. Luderschmid;G. Constanzi;J. J. Mueller-J.;F. Haider;M. F. Zaeh

Temperature-controlled friction stir welding process of Al-Cu joints with complex geometries

• DOI: 10.1063/1.5112568
• 发表时间: 2019-07
• 期刊: PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2019
• 作者: Sophie Grabmann;A. Zens;R. Marstatt;F. Haider;M. Zaeh