Effect of Re on the precipitation behavior of μ phase in several single crystal superalloys

Cheng, K. Y.; Jo, Chang-Yong; Jin, Tao; Hu, Zhuangqi

doi:10.1016/j.jallcom.2012.04.093

Cited by 47 publications

(7 citation statements)

References 15 publications

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“…The results obtained here can be readily compared with the literature. With a nominal stoichiometric composition A7B6, the µ-phase occurs in a wide range of chemical compositions incorporating the alloying elements within superalloys (Cheng et al, 2012;Krishna et al, 2013;Rae and Reed, 2001;Rehman et al, 2015;Yang et al, 2006) but also in a number of binary systems (Carvalho et al, 2000;Huhn et al, 2014;Wagner et al, 1995).…”

Section: Hardness and Indentation Modulusmentioning

confidence: 99%

“…Topologically close packed (TCP) phases, such as the μ-phase, form as precipitates in a wide range of materials. They are highly ordered phases both in terms of chemistry and stacking, although a wide range of compositions may be found (Cheng et al, 2012;Huhn et al, 2014). Their complex crystal structure usually results in pronounced brittleness of these phases (Sauthoff, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Room temperature deformation in the Fe7Mo6 μ-Phase

Schröders

Sandlöbes

Birke

et al. 2018

International Journal of Plasticity

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The role of topologically close packed (TCP) phases in deformation of superalloys and steels is still not fully resolved. In particular, the intrinsic deformation mechanisms of these phases are largely unknown including the active slip systems in most of these complex crystal structures. Here, we present a first detailed investigation of the mechanical properties of the Fe7Mo6 µ-phase at room temperature using microcompression and nanoindentation with statistical EBSD-assisted slip trace analysis and TEM imaging. Slip occurs predominantly on the basal and prismatic planes, resulting also in decohesion on prismatic planes with high defect density. The correlation of the deformation structures and measured hardness reveals pronounced hardening where interaction of slip planes occurs and prevalent deformation at pre-existing defects.

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Section: Hardness and Indentation Modulusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Room temperature deformation in the Fe7Mo6 μ-Phase

Schröders

Sandlöbes

Birke

et al. 2018

International Journal of Plasticity

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“…It seemed that the large fraction of phase did not degrade the creep properties of the present DS alloy at 760-1070 • C under a stress of 120-850 MPa. In view of the optimal growth temperature range of the phase, normally 950-1000 • C [14], a detailed investigation of creep microstructure at 975 • C under a stress of 255 MPa was carried out.…”

Section: Resultsmentioning

confidence: 99%

On the role of μ phase during high temperature creep of a second generation directionally solidified superalloy

Wang

Zhang

Lou

2010

Materials Science and Engineering: A

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“…The element segregations between the dendritic cores and interdendritic areas, the γ′ phase and γ matrix are of great significance to the precipitation of μ phase [17,21,26]. The different Re additions led to distinct elements segregation behaviors which thereby causing variations in the amount and morphology of the μ phase.…”

Section: Effect Of Re On Elements Segregationmentioning

confidence: 99%

“…They also pointed out the μ phase was enriched in Mo and they would transform into R phase which contained more Cr at elevated temperatures [16]. However, in the work of Cheng et al, all the TCP phases after thermal exposure at 1100-1150 °C were identified as μ phase with more Re and W contents [17]. In the study of Tan et al about Ru-containing single crystal superalloys, the TCP phases were also deduced as μ phase after long term aging at 1100 °C [18].…”

Section: Introductionmentioning

confidence: 96%

Evolution of TCP Phase During Long Term Thermal Exposure in Several Re-Containing Single Crystal Superalloys

Tan

Yang

Wang

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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The application and component designs of single crystal superalloys are restricted by the precipitation of topologically closed packed (TCP) phases, which can deteriorate the microstructural stability of the alloys severely. Limited researches concerning the type and morphology evolution of TCP phases under elevated temperature conditions have been reported previously. In the present work, three Re-containing single crystal alloys were designed to investigate TCP phase evolution via long term isothermal exposure tests at 1120 °C while the effects of Re on the microstructural characteristic and elements segregation were also clarified. The results showed that the addition of Re increased the instability of the alloys and the volume fraction of the TCP phases exceeded 5 vol% when the Re content reached 3 wt%. The increasing Re content had also raised the precipitation temperature of TCP phases but it did not change the type of them after long term aging; all the TCP particles were identified as μ phase in this study. Moreover, the elements segregation became considerably serious as Re addition increased constantly, which brought about various morphologies of the μ phase in the experimental alloys. In particular, the rod-like and needle-like μ phases demonstrated the typical orientation within γ matrix while the blocky μ phase was dispersedly distributed in the space. No specific orientation relationship could be observed in the μ phase when the addition of Re exceeded certain threshold value.

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Effect of Re on the precipitation behavior of μ phase in several single crystal superalloys

Cited by 47 publications

References 15 publications

Room temperature deformation in the Fe7Mo6 μ-Phase

Room temperature deformation in the Fe7Mo6 μ-Phase

On the role of μ phase during high temperature creep of a second generation directionally solidified superalloy

Evolution of TCP Phase During Long Term Thermal Exposure in Several Re-Containing Single Crystal Superalloys

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