Microstructure evolution behavior of Ni3Al (γ′) phase in eutectic γ-γ′ of Ni3Al-based alloy

Ding, Jian; Jiang, Shan; Li, Yanmo; Wu, Yuting; Wu, Jing; Peng, Yuanyi; He, Xinbo; Xia, Xingchuan; Li, Chong; Liu, Yongchang

doi:10.1016/j.intermet.2018.04.010

Cited by 25 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, these alloys did not show significant ductility. Significant efforts are undertaken to develop NiAl and Ni 3 Al based eutectic alloys [189,190]. These belong to the Ni-rich portions of the Ni-Al-X ternary phase diagram, where X is a group IV element of the periodic table such as Ti, Zr, or Hf.…”

Section: Intermetallic Based Eutectic Alloysmentioning

confidence: 99%

Five decades of research on the development of eutectic as engineering materials

Tiwary

Pandey

Sarkar

et al. 2022

Progress in Materials Science

View full text Add to dashboard Cite

Section: Intermetallic Based Eutectic Alloysmentioning

confidence: 99%

Five decades of research on the development of eutectic as engineering materials

Tiwary

Pandey

Sarkar

et al. 2022

Progress in Materials Science

View full text Add to dashboard Cite

“…Many related studies have been conducted, such as the effect of heat treatment conditions on the precipitation phase [9,10] and the relationship between the precipitation phase and the service life of the alloy [11]. In brief, some scholars paid attention to the precipitation process of the nickel base alloys, especially for the growth rate of precipitates, and analyzed the growth mechanism of precipitates by fitting the growth model [7,[12][13][14][15][16][17]. Interestingly, in different Ni based alloys, the morphology of precipitates is different.…”

Section: Introductionmentioning

confidence: 99%

Short study on mechanism of morphology change of γ′ precipitates in IN718 Plus

Duan

2024

Phys. Scr.

View full text Add to dashboard Cite

γ′ Ni3Al phase (L12 structure) strengthened superalloy has become an important strengthening phase in Ni based superalloys because of its excellent high-temperature service performance, and has been widely used. The process of γ′ phase precipitation has also received a lot of attention and research. However, most studies focused on its growth rate. There were few studies on the morphology transformation of γ′ phase, and the morphology transformation process is complex. The mechanism of γ′ phase transformation process was systematically analyzed in this paper. Firstly, through molecular dynamics calculation, the most stable morphology of the γ′ phase in the nickel matrix was obtained under ideal conditions. The stability of spherical precipitates is higher than that of cubic precipitates. When the temperature is greater than 800 K, the stability is more obvious.Then through the micro EDS analysis of the γ′ phase in the morphology transformation process, it was shown that the soft impingement phenomenon exists in the nickel base alloy with high γ′ phase volume fraction. Further, by the derivation of the formula of solid-state phase transformation, it was found that the growth rate of precipitate is directly proportional to the concentration gradient of Al in the matrix at the interface, while increases with the rising of the Al concentration in the matrix at the interface. Finally, the way and mechanism of soft impingement affecting the morphology transformation were analyzed. The precipitates formed by soft impingement are nearly cubic precipitates with rounded edges and corners.

show abstract

“…As engine components' service temperature continuously rises, intermetallic-based superalloys owning better performance have been chosen as prime alternate high-temperature structural materials [1,2]. Due to their low density, excellent oxidation resistance and favorable thermal conductivity at high temperatures [3], Ni 3 Al phase becomes the fundamental strengthening phase in Ni-Al series intermetallic-based superalloys [4], which have been successfully developed as cast polycrystalline superalloys [5], single-crystal superalloys [6] and powder metallurgy superalloys [7]. Cast polycrystalline Ni 3 Al-based superalloys with equiaxed grains or columnar grains have been usually used as blades in different cooling stages of turbine with consideration for its lower costs of replacement and repair [8].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution of Primary γ′ Phase in Ni3Al-Based Superalloy

Zhang

Peng

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

Self Cite

View full text Add to dashboard Cite

In this work, water cooling, air cooling (AC) and furnace cooling (FC) were applied to investigate the effect of cooling rate on microstructure evolution of primary γ′ in a newly designed Ni 3 Al-based alloy. The results showed that nucleation rate of primary γ′ increased with increasing cooling rate. In addition, higher cooling rate shortened growth period of primary γ′, which made its morphology close to the initial precipitated γ′. For AC and FC specimens, due to the lower cooling rate, primary γ′ possessed longer growth period and its morphology was mainly due to the evolution of lattice misfit between γ and primary γ′. Meanwhile, growth of primary γ′ depended on lattice misfit distribution between its corner and edge area. Moreover, primary γ′ morphologies of sphere, cube and concave cube with tip corners were illustrated by considering interaction between elemental diffusion and elastic strain energy.

show abstract

Microstructure evolution behavior of Ni3Al (γ′) phase in eutectic γ-γ′ of Ni3Al-based alloy

Cited by 25 publications

References 17 publications

Five decades of research on the development of eutectic as engineering materials

Five decades of research on the development of eutectic as engineering materials

Short study on mechanism of morphology change of γ′ precipitates in IN718 Plus

Microstructure Evolution of Primary γ′ Phase in Ni3Al-Based Superalloy

Contact Info

Product

Resources

About