Hee Soo Yun, Jaeyeong Park, Sang Koo Jeon, Van Hung Dao, Young-Kook Lee, Seung Hoon Nahm
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引用次数: 0
Abstract
The microstructural effect on the dwell time of the TMF test, which can describe a part of the gas turbine, was studied. In out-of-phase (OP) with dwell time on a single-crystal Ni-based superalloy, the TMF life was reduced by 61.5% compared to without dwell times. Due to the introduction of dwell time, the deformation behavior transitioned from hardening to softening. During exposure at maximum temperature, stress relaxation was occurred, which meant releasing the dislocation tangle. However, the dwell time led to the topologically close-packed (TCP) phase formation and growth. In conditions with the dwell time, TCP phase particles were increased by 241% and coarsened. Also, mechanical twins, which had resistance to crack propagation, were reduced. Therefore, the introduction of dwell time led to the promotion of cracks and the loss of resistance to crack propagation.
期刊介绍：
Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.
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