TY - CHAP A1 - Eissel, A. A1 - Engelking, Lorenz A1 - Treutler, K. A1 - Schröpfer, Dirk A1 - Wesling, V. A1 - Kannengießer, Thomas ED - da Silva, L. F. M. ED - Martins, P. A. F. ED - Reisgen, U. T1 - Nickel-Iron-Alloy Modification to Enhance Additively Welded Microstructure for Subsequent Milling N2 - The aerospace industry uses nickel–iron alloys, e.g., FeNi36, to create moulding tools for composite materials, since these alloys have a low coefficient of thermal expansion. Nickel–iron alloys are hard-to-cut materials. The moulding tools are large in size and involve complex structures, making them cost-intensive and difficult to manufacture. Thus, the focus is set on additive manufacturing, which can additionally enable the repair of components in order to eliminate local defects. However, the process usually results in a heterogeneous microstructure and anisotropic mechanical properties. As there is a high demand for a precise and exact fit of the precision moulds and the surface quality, the welded components must be subsequently machined. Additionally, inhomogeneous microstructure may lead to unstable cutting forces and conditions. Consequently, a modification of the microstructure morphology is achieved through specific alloy modifications in order to stabilise and improve the subsequent machining process. Therefore, titanium and zirconium are chosen as modification elements with a maximum 1% weight percent and are added to nickel–iron alloy powder. The elements are alloyed, and build-up welded by plasma-transferred-arcwelding. The resulting microstructure morphology of the welded wall structure and the machining properties are then determined. It can be shown that titanium has a significant effect on the structural morphology of the welded layers, as well as on the machining. KW - Alloy modification KW - Alloy 36 KW - Plasma-transferred arc welding KW - Ultrasonic-assisted milling KW - Surface integrity PY - 2022 SN - 978-3-030-95463-5 DO - https://doi.org/10.1007/978-3-030-95463-5_6 SP - 85 EP - 99 PB - Springer CY - Cham AN - OPUS4-55484 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Kannengießer, Thomas A1 - Cross, C. E. A1 - Schobbert, H. ED - Düsseldorf, DVS T1 - Prüfung der Kalt- und Heißrisssicherheit gefügter Bauteile N2 - Kaltrisssicherheit, Kaltrissprüfverfahren nach DIN EN ISO 17642, TEKKEN-Test, CTS-Test, Implant-Test, Untersuchungen zur Kaltrisssicherheit hochfester Feinkornbaustähle, Heißrisssicherheit, MVT-Test, Einfluss des Einspannbedingungen auf die Heißrissbildung von Aluminiumlegierungen KW - Kaltrisssicherheit KW - Heißrisssicherheit KW - TEKKEN-Test KW - MVT-Test PY - 2006 SN - 0935-0292 VL - 2006 SP - 142 EP - 150 PB - DVS Verlag CY - Düsseldorf AN - OPUS4-39035 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Kannengießer, Thomas A1 - Gründer, Klaus-Peter ED - Czichos, Horst T1 - Stress and strain determinaion N2 - In Chap. 1 of this book, the term Technical Diagnostics has been introduced as the examination of symptoms and syndromes to determine the nature of faults or failures of technical objects. Their characteristics in different technological areas may be of very different nature. One of them is the reaction of technical objects to deform under loads. Those loads may be induced by external forces or thermal fields resulting in mechanical or thermal stresses, respectively. Another reason of deformation is the permanent presence of internal material forces mainly caused by material processing technologies at elevated temperatures such as welding, forging, rolling, or casting and referred to as residual stresses. PY - 2013 SN - 978-3-642-25849-7 SN - 978-3-642-25850-3 DO - https://doi.org/10.1007/978-3-642-25850-3_5 IS - Chapter 5 SP - 69 EP - 108 PB - Springer CY - Berlin Heidelberg AN - OPUS4-27773 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -