Arc Welding Processes for Repair of High-Performance Titanium-Alloy Components (B06)

子项目B6的重点是开发基于电弧工艺的钛合金压缩机叶片修复方法。质量保持再生是通过结合通量效应和播种剂的应用，以及通过控制结构的添加剂积累来实现的。为了提高再生和/或受到侵蚀的叶片区域的功能特性，使用等离子弧工艺进行局部表面氮化是研究的一部分。除了实际焊接试验外，工作方案还包括结构分析、硬度和残余应力测量、疲劳评估以及观察到的材料特性对再生叶片预期使用寿命的影响。

The focus of sub-project B6 is the development of repair methods for compressor blisks made from titanium alloys, based on arc processes. Quality maintaining regeneration is achieved by the combination of flux effects and application of seeding agents, as well as by the controlled additive build-up of structures. To enhance the functional properties of blade regions that were regenerated and/or are subject to erosion, a localized surface nitriding using a plasma arc process is part of the investigation. Besides practical welding tests, the work programme includes structural analysis, measurement of hardness and residual stresses, fatigue evaluation, and the implications of observed material properties on the expected service life of regenerated blisks.