التفاصيل البيبلوغرافية
| العنوان: |
Stress-rupture behavior of a Re-containing Ni-base single crystal superalloy at high temperatures. |
| المؤلفون: |
Wang, G.L., Qi, D.Q., Liu, J.L., Liu, J.D., Li, J.G., Zhou, Y.Z., Sun, X.F. |
| المصدر: |
Journal of Materials Science & Technology; Nov2023, Vol. 163, p237-244, 8p |
| مصطلحات موضوعية: |
SINGLE crystals, HIGH temperatures, HEAT resistant alloys, NICKEL alloys, MICROCRACKS |
| مستخلص: |
• The rupture behavior at 900 ℃ is mainly determined by the multiplication of dislocations within the widening γ channels, which is closely linked with the propagation of microcracks along the inherent γ/γʹ interfaces. • The rapid formation of lamella raft structure, along with the developed-well interfacial dislocation networks, and its elastic instability are primarily responsible for the rupture behavior at 1100 °C. • There is a clear curvature tendency in the Larson-Miller plot of stress-rupture lifetime in relation with stress at high temperatures. It indicates that the influence extent of γʹ rafting on stress-rupture behavior is sensitive to the acting conditions of temperature and stress. A Re-containing Ni-base single crystal superalloy was used to investigate the elementary processes associated with stress-rupture behavior at different temperatures where the γʹ rafting occurs. At 900 °C, the rupture behavior is mainly determined by the multiplication of dislocations within the widening γ channels, which is closely linked with the propagation of microcracks along the inherent γ/γʹ interfaces. The rapid formation of lamella γ/γʹ raft structure, along with the developed-well interfacial dislocation networks, and its elastic instability are primarily responsible for the rupture behavior at 1100 °C. There is a clear curvature tendency in the Larson-Miller plot of stress-rupture lifetime in relation to stress at high temperatures. It indicates that the influence extent of γʹ rafting on stress-rupture behavior is sensitive to the acting conditions of temperature and stress. [Display omitted] [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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