Machining Performance Measures of High Temperature Heat Resistant Super alloys: A Review

Panigrahi, Ramai Ranjan; Panda, Amlana; Sahoo, Ashok Kumar; Kumar, Ramanuj

doi:10.1016/j.matpr.2019.07.423

Cited by 2 publications

(2 citation statements)

References 36 publications

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“…After a few iterations, a new convection coefficient of 10 W/m 2 .K was considered for the main body (1) and 20 W/m 2 .K for the support seat (2), main stud (4), top chamber (5), and nut (14). The thermal conductance final values between the top chamber (5), and the cutting insert (3) of 67,467 W/m 2 .K, between the heat sources ( 6) and the cutting insert (3) of 6325 W/m 2 .K, and 20,240 W/m 2 .K between the cutting insert (3) and the support seat (2). The remaining values were kept unchanged.…”

Section: Numeric Studymentioning

confidence: 99%

“…This is normally achieved by choosing the optimal machining strategies and selecting higher-performing tools. A strong effort has been made in developing new tools intended for machining heat-resistant super metal alloys (HRSA), with the introduction of specific tungsten-carbine metal alloys, surface coatings, and optimized tool geometry [2][3][4][5]. A typical limitation in machining HRSA, compared to common materials, is the superior heat generated during the cutting process, which must be extracted from the cutting zone using conventional or more advanced cooling techniques [6].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Micro-Textures on Cutting Insert Heat Dissipation

et al. 2022

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Metal machining is one of the most important manufacturing processes in today’s production sector. The tools used in machining have been developed over the years to improve their performance, by reducing the cutting forces, the friction coefficient, and the heat generated during the cutting process. Several cooling systems have emerged as an effective way to remove the excessive heat generated from the chip-tool contact region. In recent years, the introduction of nano and micro-textures on the surface of tools has allowed to further improve their overall performance. However, there is not sufficient scientific data to clearly show how surface texturing can contribute to the reduction of tool temperature and identify its mechanisms. Therefore, this work proposes an experimental setup to study the tool surface characteristics’ impact on the heat transfer rate from the tools’ surface to the cooling fluid. Firstly, a numerical model is developed to mimic the heat energy flow from the tool. Next, the design variables were adjusted to get a linear system response and to achieve a fast steady-state thermal condition. Finally, the experimental device was implemented based on the optimized numerical model. A good agreement was obtained between the experimental tests and numerical simulations, validating the concept and the implementation of the experimental setup. A square grid pattern of 100 μm × 100 μm with grooves depths of 50, 100, and 150 μm was introduced on cutting insert surfaces by laser ablation. The experimental results show that there is a linear increase in heat transfer rate with the depth of the grooves relatively to a standard surface, with an increase of 3.77% for the depth of 150 μm. This is associated with the increase of the contact area with the coolant, the generation of greater fluid turbulence near the surface, and the enhancement of the surface wettability.

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Section: Numeric Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Micro-Textures on Cutting Insert Heat Dissipation

et al. 2022

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Study on abnormal hot corrosion behavior of nickel-based single-crystal superalloy at 900 °C after drilling

Chen

Pei

et al. 2021

npj Mater Degrad

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The hot corrosion behavior of nickel-based single-crystal superalloy after drilling is investigated at 900 °C. The characteristics of hot corrosion after drilling which are different from normal hot corrosion are reflected in the formation of a more stable oxide layer and less severe spallation. The change of microstructure around the hole is the main reason for the formation of a stable oxide layer during hot corrosion by changing the diffusion process of alloying elements. Subsequently, the formation of a stable oxide layer can reduce the effect of spalling by optimizing surface stress.

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Machining Performance Measures of High Temperature Heat Resistant Super alloys: A Review

Cited by 2 publications

References 36 publications

Influence of Micro-Textures on Cutting Insert Heat Dissipation

Influence of Micro-Textures on Cutting Insert Heat Dissipation

Study on abnormal hot corrosion behavior of nickel-based single-crystal superalloy at 900 °C after drilling

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