Temperature dependence of tensile properties and deformation behaviors of nickel-base superalloy M951G

Cui, Luqing; Su, Huhu; Yu, Jinjiang; Liu, Jinlai; Jin, Tao; Sun, Xiaofeng

doi:10.1016/j.msea.2017.04.065

Cited by 51 publications

(11 citation statements)

References 21 publications

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“…At intermediate temperatures, there has always been a transitional phase of dislocation moving from shearing γ′ particles into by-passing, meaning climbing through γ′ particles for extra energy provided by heat with thermal diffusion motivation [ 16 , 17 ]. At 900 °C, this affect appeared more forcefully.…”

Section: Resultsmentioning

confidence: 99%

“…However, it was curious that a few continuous stacking faults formed, crossing two γ′ particles displayed in Figure 5 a. Meanwhile, dislocation reactions occurred between the stacking faults “I” and “II”, which would hamper other dislocations from moving [ 16 ]. The process of the formation of stacking faults and the reactions between stacking faults was vividly exhibited in Figure 6 , which would be explained and discussed later.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 6 c precisely explains the reactions between the stacking faults “I” and “II”. Suppose there are two dislocations with different Burgers vectors a/2[011] and a/2[

0], respectively, and when they sheared the γ′ particle, the splitting of dislocations occurred as follows [ 16 ].

…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, DZ951 superalloy is deliberately added with 1.5 wt% Hf and 3 wt% W named DZ951G superalloy. Previously, Cui [ 16 ] systematically studied the microstructure and deformation mechanism of the cast superalloy M951G that has the same composition as the directional solidified superalloy DZ951G. For DZ951G superalloy, it is also necessary to take the tensile test to provide the key information of the basic mechanical property.…”

Section: Introductionmentioning

confidence: 99%

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Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G

Guo

Liu

et al. 2021

Materials

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DZ951G is a novel developed nickel-based directional solidified superalloy with an incipient high melting point and low density. Compared with DZ417G superalloy, DZ951G superalloy has a higher ultimate tensile strength. At intermediate temperatures, the plasticity and strength were both markedly improved, and an obviously anomalous yield behavior could be observed where the yield strength reached its maximum at 760 °C. Below 600 °C, two competitive modes of dislocations shearing γ′ particles existed, in which one was the formation of stacking faults and another was a/2<101> dislocations shearing. At intermediate temperatures, a transitional phase between shearing γ′ particles and bypassing appeared, and the fracture translated from brittle fracture into ductile fracture. Exceeding 900 °C, bypassing of dislocations was operated under thermal activation. Moreover, short continuous stacking faults still existed at 760 °C. Finally, the various dislocation configurations were rationally illuminated and explained with the intrinsic connection of mechanical properties.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Figure 6 c precisely explains the reactions between the stacking faults “I” and “II”. Suppose there are two dislocations with different Burgers vectors a/2[011] and a/2[

0], respectively, and when they sheared the γ′ particle, the splitting of dislocations occurred as follows [ 16 ].

…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G

Guo

Liu

et al. 2021

Materials

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“…The purpose of adding 0.002 wt% B is to improve the intergranular corrosion resistance of the material. The 1.96 wt% Co is intended to stabilize austenite, inhibit coarsening of alloy carbides, enhance the binding energy of solid solution lattice, and cooperate with other alloying elements in the steel to play the role of precipitated strengthening phase [3,15].…”

Section: Methodsmentioning

confidence: 99%

Microstructures and Mechanical Properties of a Newly Developed Austenitic Heat Resistant Steel

Liu

Chu

Yuan

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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The effect of heat treatment on the microstructures and mechanical properties of a newly developed austenitic heat resistant steel (named as T8 alloy) for ultra-supercritical applications have been studied. Results show that the main phases in the alloy after solution treatment are c and primary MX. Subsequent aging treatment causes the precipitation of M 23 C 6 carbides along the grain boundaries and a small number of nanoscale MX inside the grains. In addition, with increasing the aging temperature and time, the morphology of M 23 C 6 carbides changes from semi-continuous chain to continuous network. Compared with a commercial HR3C alloy, T8 alloy has comparable tensile strength, but higher stress rupture strength. The dominant cracking mechanism of the alloy during tensile test at room temperature is transgranular, while at high temperature, intergranular cracking becomes the main cracking mode, which may be caused by the precipitation of continuous M 23 C 6 carbides along the grain boundaries. Typical intergranular cracking is the dominant cracking mode of the alloy at all stress rupture tests.

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Superior Cryogenic Tensile Strength and Ductility of In Situ Al–Cu Matrix Composite Reinforced with 0.3 wt% Nano‐Sized TiCp

et al. 2018

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In the present work, the tensile properties at 77 K of the 0.3 wt% nano‐sized TiCp/Al–Cu composite is investigated to explore its potential application at cryogenic temperature. The TiCp/Al–Cu composite exhibits superior ultimate tensile strength (620 MPa), yield strength (531 MPa), and fracture strain (7.2%) at 77 K. The addition of TiCp leads to the refinement of θ′ precipitates and enhanced dislocation strengthening effect, contributing to the improved tensile strength.

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Temperature dependence of tensile properties and deformation behaviors of nickel-base superalloy M951G

Cited by 51 publications

References 21 publications

Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G

Tensile Deformation and Fracture Behavior of Nickel-Based Superalloy DZ951G

Microstructures and Mechanical Properties of a Newly Developed Austenitic Heat Resistant Steel

Superior Cryogenic Tensile Strength and Ductility of In Situ Al–Cu Matrix Composite Reinforced with 0.3 wt% Nano‐Sized TiCp

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