H2020Индивидуална стипендия2018–2020

RESTREIG · Development of A Method for Analysis of Creep Behaviour of Welded Rotating Components of High Temperature Applications Based on Eigenstrain Theory

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-06-19 → 2020-06-18
Финансиране от ЕС: 183 455 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Деформациите при високи температури (пълзене) в заварени части от никелови суперсплави, използвани в газови турбини и реактори, се анализират чрез математически модели и изкуствен интелект. Това помага за по-точното определяне на експлоатационния живот на компонентите в авиацията и индустрията.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Development of A Method for Analysis of Creep Behaviour of Welded Rotating Components of High Temperature Applications Based on Eigenstrain Theory

Creep is a time dependent deformation that occurs in metals and alloys after prolonged exposure to stress, which is below or above yield strength, at elevated temperatures. Failures related to creep appears with the tertiary stage of this three-stage process, but they initiate and develop at the early stages. Creep beginning temperature depends on the material composition and operating stress. The service life of components of high temperature and pressure applications usually ends with a creep related failure. Creep behaviour is an important parameter for lifetime assessment of materials. ASME Boiler and Pressure Vessel Code determine allowable stresses formation to be 1% creep expansion, or deformation, in 100,000 hours of service life. This property of creep damage necessitates careful investigation of creep behaviour of materials that are used in the design of aerospace components and other industrial parts which are gas turbines, super-heaters, boilers and reactors. This summary presents a summary of recently developed computational and numerical tools to reconstruct residual stress fields and analyze creep in nickel superalloy welds used in aerospace engineering components. This approach combines experimental data with eigenstrain theory to reconstruct stress fields at the macroscopic scale and provided reliable means for numerical prediction of creep behavior of welded components under complex loading conditions. Experimental data in the form of profilometry scans was interpreted using a range of iterative eigenstrain methods that included the adaptation of the contour method and artificial intelligence models for eigenstrain-creep analysis. The integration of principles of artificial intelligence with eigenstrain models allowed highly accurate results to be obtained which were validated by comparison with experimental data obtained using independent techniques such as neutron diffraction. The use of artificial intelligence models is discussed for residual stress reconstruction and creep behavior prediction in annular aeroengine parts manufactured using inertia friction welding. To extend the range of experimental data included in consideration, the height Digital Image Correlation (hDIC) technique was introduced that utilizes information regarding triaxial displacements obtained from profilometry, allowing deeper and more reliable analysis to be conducted. The hDIC technique was validated using operando tensile testing data.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The need for high-quality joints in the aerospace industry has fostered the use of inertia friction welding for nickel-based super-alloy components. This technique provides improvements in the joint quality when compared to the fusion welding techniques, but understanding on the effect of residual stress on creep deformation of welded components is limited. The proposed research aims to develop new computational and numerical tools to reproduce the residual stress field in inertia welded components in the as-welded and post-weld heat treated conditions. This innovative approach will meet experimental data with the eigenstrain theory to reconstruct stress fields in large scales and provide a realistic model to understand creep behavior of materials under complex loading and high-temperature conditions. To achieve this target, the eigenstrain theory will be used with experimental measurements. This will allow modeling of complex geometries with high accuracy. The study will be composed of three stages which are data collection for eigenstrain reconstruction method, creating a model for eigenstrain reconstruction process and development of a visco-plastic model for investigating creep behavior of post weld heat treated samples. Results and data created in the first two stages will be used to create the visco-plastic model. Experiments will be performed using diffraction and contour methods and numerical models will be created using ABAQUS commercial finite element software. All research, management, training, dissemination, public engagement, and communication activities are scheduled into a 2 years work plan. The developed methodology is expected to provide a better understanding of creep behavior, to be used by other researcher and be beneficial for industry on the development of components with lower cost and longer service life. The success of this research will have a positive impact on the European Union and United Kingdom economies and societies.

Оригинален текст от CORDIS (на английски).

Участници

THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD · OxfordКоординаторОбединеното кралство