Lattice misfit measurement in Inconel 706 containing coherent γ′ and γ″ precipitates

Mukherji, D.; Gilles, Ralph; Barbier, Bruno; Genovese, D. Del; Hasse, B.; Strunz, Pavel; Wróblewski, T.; Fueß, H.; Rösler, Joachim

doi:10.1016/s1359-6462(02)00456-6

Cited by 63 publications

(9 citation statements)

References 5 publications

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“…This value corresponded well to the existing literature values of a 0 g . 97,98 The least squares fitting approach was also used to quantify the relative offset between the two profiles as 3:3 mm.…”

Section: Resultsmentioning

confidence: 99%

A state-of-the-art review of micron-scale spatially resolved residual stress analysis by FIB-DIC ring-core milling and other techniques

Lunt

Baimpas

Salvati

et al. 2015

The Journal of Strain Analysis for Engineering Design

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Quantification of residual stress gradients can provide great improvements in understanding the complex interactions between microstructure, mechanical state, mode(s) of failure and structural integrity. Highly focused local probe nondestructive techniques such as X-ray diffraction, electron diffraction or Raman spectroscopy have an established track record in determining spatial variations in the relative changes in residual stress with respect to a reference state for many structural materials. However, the interpretation of these measurements in terms of absolute stress values requires a strain-free sample often difficult to obtain due to the influence of chemistry, microstructure or processing route. With the increasing availability of focused ion beam instruments, a new approach has been developed which is known as the micro-scale ring-core focused ion beam-digital image correlation technique. This technique is becoming the principal tool for quantifying absolute in-plane residual stresses. It can be applied to a broad range of materials: crystalline and amorphous metallic alloys and ceramics, polymers, composites and biomaterials. The precise nano-scale positioning and welldefined gauge volume of this experimental technique make it eminently suitable for spatially resolved analysis, that is, residual stress profiling and mapping. Following a summary of micro-stress evaluation approaches, we focus our attention on focused ion beam-digital image correlation methods and assess the application of micro-scale ring-core methods for spatially resolved residual stress profiling. The sequential ring-core milling focused ion beam-digital image correlation method allows micro-to macro-scale mapping at the step of 10-1000 mm, while the parallel focused ion beam-digital image correlation approach exploits simultaneous milling operation to quantify stress profiles at the micron scale (1-10 mm). Cross-validation against X-ray diffraction results confirms that these approaches represent accurate, reliable and effective residual stress mapping methods.

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Section: Resultsmentioning

confidence: 99%

A state-of-the-art review of micron-scale spatially resolved residual stress analysis by FIB-DIC ring-core milling and other techniques

Lunt

Baimpas

Salvati

et al. 2015

The Journal of Strain Analysis for Engineering Design

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show abstract

“…In each measurement, the sample was tilted at nine ψ angles and the residual stress was calculated from the obtained diffraction peaks based on the classic "sin 2 ψ" method in the Noyan's book [16] with an xray elastic constant of 5.22 × 10 −6 MPa −1 . Mukherji et al [17] used high resolution x-ray and synchrotron diffraction to determine the lattice misfit between the γ′ precipitates and γ matrix. The results suggested that small broadening can be expected from the diffraction peak of the γ matrix due to the presence of the fine and coherent γ′ precipitates, but it does not necessarily influence the peak position significantly.…”

Section: Experimental Workmentioning

confidence: 99%

Effect of machining parameters on cutting force and surface integrity when high-speed turning AD 730™ with PCBN tools

Chen

Peng

Zhou

et al. 2018

Int J Adv Manuf Technol

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The novel wrought nickel-based superalloy, AD 730™, is a good candidate material for turbine disc applications at high temperatures beyond 650°C. The present study focuses on the machining performance of this newly developed alloy under high-speed turning conditions with advanced PCBN tools. Meanwhile, the machined surface integrity as influenced by cutting speed and feed rate was also investigated. The surface integrity was thoroughly characterized in terms of surface roughness and morphology, machining-induced plastic deformation, white layer formation, and residual stresses. It has been found that the cutting speed and feed rate had a strong effect on the cutting forces and resultant surface integrity. The cutting forces required when machining the alloy were gradually reduced with increasing cutting speed, while at 250 m/min and above, the flank tool wear became stronger which led to increased thrust force and feed force. A higher feed rate, on the other hand, always resulted in higher cutting forces. Increasing the cutting speed and feed rate in general deteriorated the surface integrity. High cutting speeds within the range of 200-250 m/min and a low feed rate of 0.1 mm/rev are preferable in order to implement more cost-effective machining without largely reducing the surface quality achieved. The formation of tensile residual stresses on the machined AD 730™, however, could be of a concern where good fatigue resistance is critical.

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“…EDS analysis, on the other hand, shows that phase concentrates of nickel and niobium phase intersect at the same points, which indicates the formation of meta-stable BCT c 00 (Ni 3 Nb) phase in the matrix. Mukherji et al [19] reported that FCC c 0 Ni 3 (Al,Ti) and BCT c 00 (Ni 3 Nb) phases formed in aged IN 706 superalloys. However, in the present study only BCT c 00 (Ni 3 Nb) phase was observed.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

Artificial neural network prediction of aging effects on the wear behavior of IN706 superalloy

2015

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Lattice misfit measurement in Inconel 706 containing coherent γ′ and γ″ precipitates

Cited by 63 publications

References 5 publications

A state-of-the-art review of micron-scale spatially resolved residual stress analysis by FIB-DIC ring-core milling and other techniques

A state-of-the-art review of micron-scale spatially resolved residual stress analysis by FIB-DIC ring-core milling and other techniques

Effect of machining parameters on cutting force and surface integrity when high-speed turning AD 730™ with PCBN tools

Artificial neural network prediction of aging effects on the wear behavior of IN706 superalloy

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