Improvement of creep rupture strength of a liquid metal cooling directionally solidified nickel-base superalloy by carbides

Zhao, Kai; Ma, Yuanyuan; Lou, Liren

doi:10.1016/j.jallcom.2008.07.127

Cited by 32 publications

(14 citation statements)

References 17 publications

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“…Due to the excellent high temperature mechanical and thermal properties, Ni-base single-crystal superalloys have been widely used for manufacturing the turbine blades for aero-engines and industry gas turbine (IGT) [1][2][3]. To improve the high temperature performance, the total amount of refractory elements addition in modern Ni-base superalloys is gradually increased.…”

Section: Introductionmentioning

confidence: 99%

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Liu

et al. 2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Liu

et al. 2011

Journal of Alloys and Compounds

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“…Moreover, carbide size and morphology tended to exhibit smaller, blocky carbides compared to larger carbides of the conventional DZ125 superalloy. Researches [24][25][26][27] show that the carbides were important contributors to the improvement of the creep rupture strength in some superalloys. These benefits may explain the better properties of the LMC samples.…”

Section: Methodsmentioning

confidence: 99%

Effect of process parameters on microstructures and properties of DZ125 superalloy solidified by LMC

Zhang

Pei

et al. 2014

Materials Research Innovations

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High thermal gradient in the interface region of melting and solidified metal during the unidirectional solidification has significant impact on the microstructures and mechanical properties of the castings. In this paper, DZ125 superalloy was solidified by directional equipment associated with liquid metal cooling medium of Ga-In alloy. Several process parameters have been chosen in order to understand the effect of thermal gradient on the castings. Comparing with traditional high rate solidification prepared DZ125 superalloy, the results show that element segregation such as Al, Ti, W and Mo was decreased with high thermal gradients or high withdraw rates, the precipitation of low melting phase in the interdendritic region was suppressed and the sizes of eutectic and c9 phase were both refined. Stress-rupture test was carried out at 980uC/235 MPa after heat treatment. Obvious stress-rupture improvement has been observed, and the stress-rupture life decrease at high withdrawal rate due to the column grain discontinuity and deflection.

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“…6 The creep rupture strength of a new developed liquid metal cooling (LMC) directionally solidified (DS) nickel based superalloy was improved by minor carbon additions. 7 In the present paper, the creep rupture strength was further improved by optimising the solution heat treatment. It is the aim of the present work to elucidate the elimination of primary c9 and its role on the stress rupture life.…”

Section: Introductionmentioning

confidence: 93%

Dependence of creep rupture life on primaryγ′ of a liquid metal cooling directionally solidified nickel-based superalloy

Zhao

2013

International Journal of Cast Metals Research

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The dependence of the creep rupture strength on the microstructure of a liquid metal cooling directionally solidified nickel based superalloy was investigated over a wide range from 980 to 1100uC. The creep rupture lives were prolonged especially at 980uC/310 MPa as a result of the elimination of the blocky primary c9. The fractured specimens were sectioned and examined to reveal the deformation microstructures and active dislocation deformation mechanisms.

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Improvement of creep rupture strength of a liquid metal cooling directionally solidified nickel-base superalloy by carbides

Cited by 32 publications

References 17 publications

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Effect of process parameters on microstructures and properties of DZ125 superalloy solidified by LMC

Dependence of creep rupture life on primaryγ′ of a liquid metal cooling directionally solidified nickel-based superalloy

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