Segregation at stacking faults within the γ′ phase of two Ni-base superalloys following intermediate temperature creep
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چکیده
منابع مشابه
Temperature and Orientation Dependence of Creep Damage of Two Ni-base Superalloys
Both polycrystalline (PC) and directionally-solidified (DS) Ni-base superalloys are commonly applied as turbine materials to primarily withstand creep conditions manifested in either marine-, airor land-based gas turbines components. The thrust for increased efficiency of these systems, however, translates into the need for these materials to exhibit considerable strength and temperature resist...
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Mechanisms of creep deformation in polycrystalline Ni-base disk superalloys R.R. Unocic a,∗, G.B. Viswanathan a, P.M. Sarosi a, S. Karthikeyan b, J. Li a, M.J. Mills a a Department of Materials Science and Engineering, The Ohio State University, 477 Watts Hall, 2041 College Road, Columbus, OH 43210, USA b Department of Materials Engineering, Indian Institute of Science Bangalore, Karnataka 5600...
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Novel techniques for characterizing and assessing the properties of Ni-base superalloys are becoming increasingly important to the accelerated development of new structural alloys and the advancement of physics-based mechanical property models. Instrumented indentation techniques have long served as a useful approach for probing the mechanical response of a wide range of engineering materials. ...
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To understand the effects of alloying elements on the creep rate of Ni-base superalloys, factors entering into a secondary creep rate are calculated via first-principles calculations based on density functional theory for 26 Ni31X systems where X = Al, Co, Cr, Cu, Fe, Hf, Ir, Mn, Mo, Nb, Os, Pd, Pt, Re, Rh, Ru, Sc, Si, Ta, Tc, Ti, V, W, Y, Zr, and Zn. They are volume, elastic properties, stacki...
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This paper presents results from a research initiative aimed at investigating high temperature creep deformation mechanisms in Ni-base superalloys through a combination of creep experiments, TEM deformation mechanism characterization, and state of the art modeling techniques. The effect of microstructure on dictating creep rate controlling deformation mechanisms was revealed for specimens with ...
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ژورنال
عنوان ژورنال: Scripta Materialia
سال: 2015
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2014.06.032