Influences of solution cooling rate on microstructural evolution of a multiphase Ni3Al-based intermetallic alloy

Wu, Jing; Li, Chong; Liu, Yongchang; Xia, Xingchuan; Wu, Yuting; Ma, Zongqing; Wang, Haipeng

doi:10.1016/j.intermet.2019.03.010

Cited by 28 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One reason was that Ni coating hindered the diffusion reaction between Al and Fe, which resulted in a reduction in IMCs thickness. The other reason was that Ni atoms reacted with Al to form Ni 2 Al 3 and replaced Fe atoms to form (Fe, Ni) 2 Al 3 , and these compounds improve the corrosion resistance of the joints [28][29][30].…”

Section: Effect Of Ni Coating On Corrosion Resistance Of Al Alloy/ste...mentioning

confidence: 99%

Effect of Ni Coating on Microstructure and Property of Al Alloy/Steel CMT Welding-Brazing Joints

Zhang

et al. 2023

Coatings

View full text Add to dashboard Cite

The cold metal transfer (CMT) welding-brazing process was chosen to join Al alloy and Ni-coated steel using AlSi12 as the filler wire. The macrostructure and microstructure of the joints were tested by using an optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometry (EDS), and X-ray diffraction (XRD). The tensile properties and corrosion properties of the joints were also tested. The results showed that Ni coating could improve the wettability and spreadability of molten AlSi12 filler metal on the steel surface, resulting in a good appearance for the Al alloy/steel joint. Ni coating could hinder the chemical metallurgical reaction between Al atom and Fe atoms to inhibit the formation of brittle Fe-Al intermetallic compounds (IMCs) and reduce the thickness of the IMCs layer. Meanwhile, the Ni atom reacted with the Fe and Al atoms to form Al3Ni2, (Fe, Ni) Al3 and (Fe, Ni)2Al3, which improved the tensile strength of the joints. All joints with Ni coating cracked near the Al alloy. When the Ni-coating thickness was 5 μm, the tensile strength of the joint reached a maximum of 202.5 MPa. The addition of Ni could also improve the corrosion resistance of the joints. Significantly, when the Ni-coating thickness was 10 μm, most of the Ni coating was still solid, and the interface reaction layer was mainly composed of α-Ni solid solution and some (Fe, Ni)2Al3.

show abstract

Section: Effect Of Ni Coating On Corrosion Resistance Of Al Alloy/ste...mentioning

confidence: 99%

Effect of Ni Coating on Microstructure and Property of Al Alloy/Steel CMT Welding-Brazing Joints

Zhang

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

“…The as-cast single-crystal test bar was heated in a stepwise manner in a smart multi-stage temperature-controlled vacuum high-temperature tube furnace to its solution temperature of 1315 • C, followed by 4 h solution heat treatment. This was followed by furnace cooling 1 (0.15 • C)/s), furnace cooling 2 (0.6 • C/s), air cooling (72 • C/s) and water cooling (138 • C/s) [22], as four different cooling rates to make the material cool to room temperature. For the convenience of marking, FC1, FC2, AC and WC are used to represent four different cooling methods in the following text.…”

Section: Test Materials and Processmentioning

confidence: 99%

The Effect of the Cooling Rates on the Microstructure and High-Temperature Mechanical Properties of a Nickel-Based Single Crystal Superalloy

2020

View full text Add to dashboard Cite

The as-cast alloy of nickel-based single-crystal superalloy was used as the research object. After four hours of solution treatment at 1315 °C, four cooling rates (water cooling (WC), air cooling (AC) and furnace cooling (FC1/FC2)) were used to reduce the alloy to room temperature. Four different microstructures of nickel-based superalloy material were prepared. A high-temperature tensile test at 980 °C was carried out to study the influence of various rates on the formation of the material’s microstructure and to further obtain the influence of different microstructures on the high-temperature mechanical properties of the materials. The results show that an increase of cooling rate resulted in a larger γ′ phase nucleation rate, formation of a smaller γ′ phase and a greater number. When air cooling was used, the uniformity of the γ′ phase and the coherence relationship between the γ′ phase and the γ phase were the best. At the same time, the test alloy had the best high-temperature tensile properties, and the material showed a certain degree of plasticity. TEM test results showed that the test alloy mainly blocked dislocations from traveling in the material through the strengthening effect of γ′, and that AC had the strongest hindering effect on γ′ dislocation movement.

show abstract

“…Dimension and morphology of primary γ′ are more complicated for multiple precipitated phases (e.g., directional mushroom-like γ′ [20], carbonrich intermetallics [21] and β phase with L1 0 structure [22]). Some of the mentioned phases are sensitive to temperature and conducting diverse transformation during heat treatment, especially under different solution cooling rates [23,24]. Wu et al [24] investigated the effect of cooling rate on the unstable phase (β) in polycrystalline Ni 3 Al-based superalloy; they found that the precipitation behavior was significantly impacted by cooling rate, leading to the configuration of nanotwins with interior stacking faults in β and the evolution of primary γ′ morphology.…”

Section: Introductionmentioning

confidence: 99%

“…Some of the mentioned phases are sensitive to temperature and conducting diverse transformation during heat treatment, especially under different solution cooling rates [23,24]. Wu et al [24] investigated the effect of cooling rate on the unstable phase (β) in polycrystalline Ni 3 Al-based superalloy; they found that the precipitation behavior was significantly impacted by cooling rate, leading to the configuration of nanotwins with interior stacking faults in β and the evolution of primary γ′ morphology. However, the mentioned phenomena are not fully investigated.…”

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

Influences of solution cooling rate on microstructural evolution of a multiphase Ni3Al-based intermetallic alloy

Cited by 28 publications

References 33 publications

Effect of Ni Coating on Microstructure and Property of Al Alloy/Steel CMT Welding-Brazing Joints

Effect of Ni Coating on Microstructure and Property of Al Alloy/Steel CMT Welding-Brazing Joints

The Effect of the Cooling Rates on the Microstructure and High-Temperature Mechanical Properties of a Nickel-Based Single Crystal Superalloy

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

Contact Info

Product

Resources

About