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Nickel alloys. --- Nickel alloys --- Stress corrosion. --- Alloys
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This licentiate thesis by Frans Palmert focuses on the fatigue crack growth behavior of nickel-based single crystal superalloys, primarily used in gas turbine blades. These materials are critical due to their ability to withstand severe mechanical loading and high temperatures. The work aims to enhance understanding of crack growth under service conditions and improve testing methodologies. It explores the anisotropic mechanical properties of these alloys and the complexities of crack growth along crystal planes. The research includes isothermal and fatigue crack growth testing, examining the influence of crystal orientation and temperature. The study is significant for improving fatigue life predictions, essential for maximizing the efficiency and reliability of gas turbines.
Nickel alloys. --- Fatigue. --- Nickel alloys --- Fatigue
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This dissertation by Frans Palmert investigates the fatigue crack growth behavior of nickel-based single crystal superalloys, primarily used in gas turbine blades. The study aims to enhance the understanding of crack propagation under service-like conditions and improve testing methodologies. It focuses on the anisotropic mechanical properties of these alloys and their tendency for inelastic deformation along the crystal lattice planes. Various testing methods, including isothermal and fatigue, are utilized to analyze crack growth concerning crystal orientation and temperature. The research further explores deformation mechanisms and develops a compliance-based method for evaluating crack opening force. This work is crucial for predicting damage tolerance and ensuring the structural integrity of gas turbine components. Intended for engineers and researchers in materials science, the study emphasizes the importance of accurate crack growth predictions under varying loading conditions.
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This dissertation by Jinghao Xu explores the development and application of nickel-based superalloys in the context of additive manufacturing. It investigates the structural integrity and mechanical properties of these materials, which are crucial for high-temperature applications in industries like aerospace and energy. The research aims to improve manufacturing processes and enhance material performance. This work is intended for an academic audience, particularly those involved in materials science and engineering, and addresses the challenges and innovations in using superalloys for advanced manufacturing techniques.
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Nickel --- Nickel alloys --- Nickel.
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