Matrix Channel Width Evolution of Single Crystal Superalloy Under Creep and Thermal Mechanical Fatigue: Experimental and Modeling Investigations

Guo, Zixu; Song, Ziyuan; Huang, Dawei; Yan, Xiangqiao

doi:10.1007/s12540-022-01195-8

Cited by 6 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the basic version of channel width method, an image processing program is developed to investigate the probability characteristic of γ channel width, and a channel width evolution model considering non-quasi-static modifcation which obeys lognormal distribution is put forward, also, the mean values follow linear relationship with standard deviations. [8] In this method, the alloy's degree of valve is considered to be proportional to its channel width between its γ ′ phases. been calibrated at the temperatures of 950°C and 1050°C.…”

Section: Mathematical Description Of Rafting Microstructure Morphologymentioning

confidence: 99%

The micro-structure and mechanical performance of Nickel-based single crystal alloy

Guang

2023

AETR

View full text Add to dashboard Cite

Because of the increasing temperature in front of turbine in aero-engine field, Ni-base single crystal alloys are of high demand, which achieve high strength at high temperature. Therefore, a variety of methods have been developed to detect or describe nickel-base single crystal alloys. This article will take stock of the alloy valve and the mainstream description of valve methods. This paper will describe the basic micro-mechanism of rafting. Then the channel width method, which is the most widely used method to describe the degree of rafting, is introduced. After that, the updated version of the channel width method, the method to describe the rate of rafting and the effect on its strength, and the related methods of image processing are described. It is hoped that this paper can help readers to have a preliminary understanding of the principle and mathematical description method of nickel-base alloy rafting. There are many branches of mathematical description, but the main ideas are very similar. It is hoped that the researchers concerned will be able to develop some mathematical models that require fewer measurement parameters but not reducing the overall accuracy of the measuremen.

show abstract

Section: Mathematical Description Of Rafting Microstructure Morphologymentioning

confidence: 99%

The micro-structure and mechanical performance of Nickel-based single crystal alloy

Guang

2023

AETR

View full text Add to dashboard Cite

show abstract

“…Shown in Fig. 1c is the line slicing method, which is conducted along a certain orientation relative to the precipitate orientation [28,29] or along two perpendicular directions in form of a grid [30,31]. These techniques require knowledge about the orientation of the microstructure within the image to find a physically meaningful measure for the precipitate spacing that effectively hinders dislocation movement through a matrix channel.…”

Section: Introductionmentioning

confidence: 99%

3D Minimum Channel Width Distribution in a Ni-Base Superalloy

Müller

Böttger

Schleifer

et al. 2023

Integr Mater Manuf Innov

View full text Add to dashboard Cite

The strength of a Ni-base superalloy depends strongly on its microstructure consisting of cuboidal $${\gamma }^{^{\prime}}$$ γ ′ precipitates surrounded by narrow channels of $$\gamma $$ γ matrix. According to the theory of Orowan, a moving dislocation has to crimp through the minimal inter-precipitate spacing to admit the plastic deformation. We present a novel approach to evaluate the matrix channel width distribution of a matrix/$${\gamma }^{^{\prime}}$$ γ ′ microstructure in binary representation. Our method relies on precise determination of the matrix/precipitate interfaces and requires no additional user input. For each matrix channel between two neighboring precipitates, we identify the minimal interface to interface distance vector with its length being the channel width. The performance of this method is demonstrated on the example of the commercial alloy CSMX-4. We show that, in contrast to conventional line sectioning approaches, the approach consistently handles experimental 2D micrographs and 3D phase-field simulation data. The identified distance vectors correlate to the underlying crystal symmetry independent of the image orientation. The obtained channel width distributions compare well between the 2D and 3D data. This is in terms of similar median and $$\sigma $$ σ of a log-normal distribution. The presented method overcomes limitations of the conventional line slicing approaches and provides a versatile tool for automated microstructure characterization.

show abstract

Simple Data Analytics Approach Coupled with Larson–Miller Parameter Analysis for Improved Prediction of Creep Rupture Life

Lee

Choi

2023

Met. Mater. Int.

View full text Add to dashboard Cite

Matrix Channel Width Evolution of Single Crystal Superalloy Under Creep and Thermal Mechanical Fatigue: Experimental and Modeling Investigations

Cited by 6 publications

References 39 publications

The micro-structure and mechanical performance of Nickel-based single crystal alloy

The micro-structure and mechanical performance of Nickel-based single crystal alloy

3D Minimum Channel Width Distribution in a Ni-Base Superalloy

Simple Data Analytics Approach Coupled with Larson–Miller Parameter Analysis for Improved Prediction of Creep Rupture Life

Contact Info

Product

Resources

About