The effect of heat treatment on characteristics of the gamma prime phase and hardness of the nickel-based superalloy Rene®80

Barjesteh, Mohammad Mehdi; Abbasi, S.M.; Madar, Karim Zangeneh; Shirvani, Kourosh

doi:10.1016/j.matchemphys.2019.01.038

Cited by 33 publications

(7 citation statements)

References 13 publications

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“…The HT3 and HT4 samples contained spherical and near-cuboid γ′ precipitates in comparison to the HT1 and HT2 heat-treated samples. The morphological changes of the γ′ particles are mainly due to the competition between elastic strain energy and interface energy under various aging conditions [ 3 , 7 , 30 , 31 ]. Due to the fine size of the γ′ phase, the lattice mismatch between the γ matrix and γ′ phase is generally low for the HT1 and HT2 samples.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the isotropic interfacial energy causes the spherical γ′ phase to form. With further coarsening and undergoing Ostwald ripening of the γ′ phase, the elastic strain energy increases faster than the interfacial energy [ 5 , 7 , 30 , 31 ]. At this time, the elastic strain energy controls and predominates the spherical to the cuboidal shape of γ′ in the HT3 and HT4 samples.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Nano-Sized γ′ Phase on the Ultrasonic and Mechanical Properties of Ni-Based Superalloy

Jie

Yang

et al. 2022

Nanomaterials

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The effect of the nano-sized γ′ phase on the ultrasonic and mechanical properties of the IN939 superalloy was investigated. The results indicate that the microstructure characteristics of the nano-sized γ′ phase directly affected the ultrasonic longitudinal velocity, the attenuation coefficient, and the mechanical properties. The ultrasonic longitudinal velocity increased with the volume fraction of the γ′ phase, whereas the attenuation coefficient was similar to the fractional change in the γ channel width. The lower fractional change in the γ channel width, in combination with a high volume fraction of the γ′ phase, was conducive to improving the mechanical properties of the superalloy. Additionally, the variation in the ultrasonic properties could reflect the variation in the mechanical properties of the IN939 superalloy, which was beneficial for optimizing the heat treatment process and characterizing the γ′ phase precipitation behavior in a nondestructive manner.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effect of Nano-Sized γ′ Phase on the Ultrasonic and Mechanical Properties of Ni-Based Superalloy

Jie

Yang

et al. 2022

Nanomaterials

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“…Differently from other Ni-based alloys such as Astroloy [33][34][35] which shows a tri-modal distribution, CM247 LC reinforcing system consist of only two families of precipitates namely primary and secondary γ'. In traditionally manufactured samples primary and secondary gamma prime measure around 300 and 35 nm respectively [31]. Such precipitates, as long as they remain stable, are extremely effective in preventing the dislocation movements as demonstrated by Pollock [36] in her work.…”

Section: Introductionmentioning

confidence: 94%

“…The heat treatment will strongly influence the average size and fraction of γ' precipitates which in this material appears as cuboidal particles due to the lattice mismatch between the particles and the matrix [30,31]. Normally cast CM247 LC is known for having a γ' volume fraction close to 65% as assessed by Kim [32].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Solution and First Aging Treatment Applied to As-Built and Post-HIP CM247 Produced Via Laser Powder Bed Fusion (Lpbf)

Bassini¹,

Sivo²,

Pietro³

et al. 2021

SSRN Journal

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“…Diepold et al [17] emphasized a tailored heat treatment process for superalloy IN718, resulting in superior dissolution of the Laves phase, homogenization of Nb content, and the formation of enhanced γ′ and γ′′ phase precipitates. Barjesteh et al [18] explored the impact of heat treatment on superalloy Rene ® 80, highlighting temperaturedependent changes in γ′-Ni 3 (Al, Ti) phase properties. It was shown that an increase in temperature leads to a decrease in γ-γ′ lattice mismatch, and superalloy hardness decreases with heat treatment time.…”

Section: Introductionmentioning

confidence: 99%

Atomic behavior of nickel-based single crystal superalloy during heat treatment process based on molecular dynamics

Zheng,

Bian,

Chen

et al. 2024

Phys. Scr.

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The heat treatment process plays a pivotal role in enhancing the characteristics of nickel-based single crystal (NBSC) superalloys. Nevertheless, there exists a paucity of comprehensive investigations concerning the microstructural evolution of NBSC superalloys during heat treatment. This study employs a molecular dynamics simulation method to control the temperature of the NBSC superalloy precisely, aiming to unveil intricate details regarding microstructural evolution, temperature distribution patterns, mechanical properties, and other pertinent aspects during the cooling phase. Additionally, a comparative analysis of internal defect evolution under varying cooling rates is undertaken. The findings highlight the consistently heightened activity of atoms in the γ phase compared to those in the γ' phase. Notably, the stability disparity between these phases gradually diminishes as the temperature decreases during the cooling process. At elevated temperatures, the prevalence of amorphous phases and dislocations in the γ phase channel diminishes concomitantly with the temperature reduction. Strain distribution in the alloy primarily concentrates in the γ phase channel and the central cross position of the γ' phase. The temperature reduction correlates with a decline in the alloy model's strain. In the initial phase of strain reduction, stress fluctuation trends in the X, Y, and Z directions exhibit an initial increase followed by a gradual decrease. Furthermore, the atomic number of HCP defects and dislocation density exhibit distinct patterns of change contingent upon the cooling rates employed.

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The effect of heat treatment on characteristics of the gamma prime phase and hardness of the nickel-based superalloy Rene®80

Cited by 33 publications

References 13 publications

Effect of Nano-Sized γ′ Phase on the Ultrasonic and Mechanical Properties of Ni-Based Superalloy

Effect of Nano-Sized γ′ Phase on the Ultrasonic and Mechanical Properties of Ni-Based Superalloy

Effects of the Solution and First Aging Treatment Applied to As-Built and Post-HIP CM247 Produced Via Laser Powder Bed Fusion (Lpbf)

Atomic behavior of nickel-based single crystal superalloy during heat treatment process based on molecular dynamics

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