Nucleation, growth and coarsening of γ′-precipitates in a Ni–Cr–Al-based commercial superalloy during artificial aging

Picasso, A.; Somoza, A.; Tolley, A.

doi:10.1016/j.jallcom.2008.12.068

Cited by 33 publications

(16 citation statements)

References 16 publications

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“…ening ␥ phase (L1 2 structure). During the cooling processing, ␥ phase coherently precipitates from the supersaturated ␥-solid solution [18]. Fig.…”

Section: Tablementioning

confidence: 99%

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Liu

et al. 2011

Journal of Alloys and Compounds

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“…ening ␥ phase (L1 2 structure). During the cooling processing, ␥ phase coherently precipitates from the supersaturated ␥-solid solution [18]. Fig.…”

Section: Tablementioning

confidence: 99%

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Liu

et al. 2011

Journal of Alloys and Compounds

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“…16,17 In this study, at a PWHT temperature of 705°C and a PWHT time of 2 h, scattered g 0 carbides were observed in the parent phase using SEM, as shown in Figure 8(a). At the high SEM magnification in Figure 4, the scattered fine g 0 precipitates were observed around the interior of the grains.…”

Section: Microstructure Analysismentioning

confidence: 56%

Investigation into the influence of post-weld heat treatment on the microstructure and hardness of Inconel X-750

Peasura

Poopat

2015

Advances in Mechanical Engineering

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This work describes a post-weld heat treatment for a precipitation-hardened nickel alloy. Inconel X-750 is a nickel-based superalloy for gas tungsten arc welding processes. The materials were heat-treated in two steps: solution and aging. The post-weld heat treatment variables examined in this study included post-weld heat treatment temperatures of 705°C, 775°C, and 845°C and post-weld heat treatment time of 2-24 h in 2-h increments. The resulting materials were examined using the full factorial design of experiments to determine the resulting material hardness and observed with optical microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy in the fusion zone and heat-affected zone. The results show that a longer post-weld heat treatment time corresponds to larger g 0 precipitates and a smaller amount of Cr 23 C 6 at the grain boundaries, which can decrease the overall hardness. The post-weld heat treatment analysis indicates that an increase in the amount of g 0 results in better mechanical properties for particles with octagonal shapes and a small size. A factorial analysis, which was conducted on the relationship between the post-weld heat treatment temperature and time to the hardness of the fusion zone, had a 95% confidence level.

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“…The present study contains a review of the literature based on SX casting, specifically the process parameters affecting crystal orientation and SX selection during DS process. These parameters have been selected because superior mechanical properties are widely affected by them . This research will aid in gaining an in‐depth understanding of the behavior of parameters for manufacturing parts with SX casting.…”

Section: Introductionmentioning

confidence: 99%

Grain Selection and Crystal Orientation in Single‐Crystal Casting: State of the Art

Raza

Wasim

Hussain

et al. 2019

Crystal Research and Technology

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The properties of single‐crystal superalloys depend highly upon crystallographic orientation and the selection of single crystal (SX) in directional solidification (DS) process. The assessment of SX selection and crystallographic orientation determines the mechanical properties of the casting. Generally, it is considered that the deviation from [001] orientation should be less than 10° for better mechanical properties. This article provides a quantitative literature review analyzing the experimental results of 30 papers that studied the effects of process parameters on crystal orientation and grain selection in SX‐casting process. Key parameters that control the SX casting during DS process include spiral selector parameters, starter block parameters, withdrawal rate, pouring temperature, and ceramic mold temperature. The analysis in this research provides a strong evidence to assist the standard operating range of each parameter. A lack of focus in the literature on alloys is found. A framework based on the key parameters is also proposed in this review.

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Nucleation, growth and coarsening of γ′-precipitates in a Ni–Cr–Al-based commercial superalloy during artificial aging

Cited by 33 publications

References 16 publications

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

Investigation into the influence of post-weld heat treatment on the microstructure and hardness of Inconel X-750

Grain Selection and Crystal Orientation in Single‐Crystal Casting: State of the Art

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