Dynamic recrystallisation model in precipitation-hardened superalloys as a tool for the joint design of alloys and forming processes

Tancret, Franck; Galindo-Nava, E.I.; Díaz-Del-Castillo, Pedro Eduardo Jose Rivera

doi:10.1016/j.matdes.2016.04.076

Cited by 21 publications

(8 citation statements)

References 33 publications

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“…During hot deformation, the slow dynamic recovery (DRV) hardly balances the strain hardening [42,43]. The high deformation storage energy drives the progress of DRX, which is the main dynamic softening mechanism for the studied superalloy [44,45]. …”

Section: Hot Deformation Characteristicsmentioning

confidence: 99%

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Wen

Lin

Zhou

2017

Vacuum

120

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Section: Hot Deformation Characteristicsmentioning

confidence: 99%

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

Wen

Lin

Zhou

2017

Vacuum

120

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“…Backe et al [23] put effort on modeling precipitation and its effects on dynamic recrystallization in Nb microalloyed steels. Tancret et al [24], modeled the effect of γ influence on the retardation of DRX through a net driving force analysis.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Deformation Behavior of 718Plus: Consideration of γ′ Effects

Özturk

Cabrera

Calvo

et al. 2020

Matls. Perf. Charact.

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The hot deformation behavior of 718Plus is modelled through a physically based hybrid dislocation density model which includes the effects of precipitating particles. It is well known that the service performance and hot-flow characteristics of this alloy are strongly dependent on the microstructure, particularly the grain size and second phase particles. Thus, comprehension and modelling of the hot flow behavior is an important task. In precipitation hardening alloys (superalloys, microalloyed steels, etc.) it is particularly more challenging to model the microstructural evolution, in the processing windows, where material softening and precipitation processes take place, concurrently. In this work, the initial stages of the deformation is studied.

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“…At a given temperature, the volume fraction of γ′ precipitates correlates to the hardening elements present and affects the high temperature strength of the nickel alloy [14]. A study by Tancret, et al [16] on the design of a dynamic recrystallization model in precipitation-hardened superalloys indicates the relationship between recrystallized grain sizes, temperature and strain rate.…”

Section: Introductionmentioning

confidence: 99%

Machinability of Rene 65 Superalloy

et al. 2019

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Nickel-based superalloys are heavily used in the aerospace and power industries due to their excellent material and mechanical properties. They offer high strength at elevated temperatures, high hardness, corrosion resistance, thermal stability and improved fatigue properties. These superalloys were developed to address the demand for materials with the enhanced heat and stress capabilities needed to increase operational temperatures and speeds in jet and turbine engines. However, most of these properties come with machining difficulty, high wear rate, increased force and poor surface finish. Rene 65 is one of the next generation wrought nickel superalloys that addresses these demands at a reduced cost versus powder metallurgy superalloys. It is strengthened by the presence of gamma prime precipitates in its microstructure, which enhance its strength at high temperatures. Notwithstanding its advantages, Rene 65 must also deal with the reality of the poor workability and machinability generally associated with Ni-based superalloys. This study examines the machinability—using drilling tests—of Rene 65 and seeks to establish the influence of hardness (with varying microstructure) and cutting conditions on machinability indicators (surface finish, forces and chip formation). The experimental setup is based on a set of experimental drilling tests using three different heat-treated samples of varying hardness. The results indicate a negligible effect from material hardness, ranging from 41 HRC to 52 HRC, on generated cutting forces and a similarly low effect from cutting speeds. The feed rate was identified as the main factor of relevance in cutting force and chip morphology during the machining of this new superalloy.

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Dynamic recrystallisation model in precipitation-hardened superalloys as a tool for the joint design of alloys and forming processes

Cited by 21 publications

References 33 publications

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

A new dynamic recrystallization kinetics model for a Nb containing Ni-Fe-Cr-base superalloy considering influences of initial δ phase

High-Temperature Deformation Behavior of 718Plus: Consideration of γ′ Effects

Machinability of Rene 65 Superalloy

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