scholarly journals Machinability of Nickel-Based Superalloys Using Ceramic Tools

Author(s):  
Anton Seleznev ◽  
Nestor Washington Solis Pinargote ◽  
Anton Smirnov

Nickel-based superalloys are attractive to many industrial sectors (automotive, military, energy, aerospace etc.). However, their physical properties make them difficult to machining using traditional tools. Therefore, the new materials for the machining of Ni-based alloys are required. Ceramic-based composites could act as a tool to replace the current materials. The incentives for this paper are to provide an overview of existing ceramic composites and draw some conclusions that will help in solving the problem of choosing materials for processing of Ni-based superalloys. Despite the diversity of ceramic composites in this work the focus was on the SiAlON ceramic.

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1385
Author(s):  
Anton Seleznev ◽  
Nestor Washington Solis Pinargote ◽  
Anton Smirnov

Nickel-based superalloys are attractive to many industrial sectors (automotive, military, energy, aerospace, etc.). However, their physical properties make them difficult to machining using traditional tools. Therefore, new materials for the machining of Ni-based alloys are required. Ceramic-based composites could act as a tool to replace the current materials. The incentives for this paper are to provide an overview of existing ceramic composites and draw some conclusions that will help in solving the problem of choosing materials for the processing of Ni-based superalloys. Despite the diversity of ceramic composites in this work, the possibility of using the SiAlON ceramic for Ni-based alloy machining is highlighted.


2021 ◽  
Vol 4 (03) ◽  
pp. 50-71
Author(s):  
Leonardo Dos Santos ◽  
Bernardo L. Rodrigues ◽  
Camila B. Pinto

The ongoing increase in the number of experimental charge-density studies can be related to both the technological advancements and the wide applicability of the method. Regarding materials science, the understanding of bonding features and their relation to the physical properties of materials can not only provide means to optimize such properties, but also to predict and design new materials with the desired ones. In this tutorial, we describe the steps for a charge-density analysis, emphasizing the most relevant features and briefly discussing the applications of the method.


1999 ◽  
Vol 15 (01) ◽  
pp. 32-52
Author(s):  
J. Carey Filling ◽  
Elizabeth Gauthier ◽  
Walter Kopp

This paper provides an introduction to shipboard signage design, construction, and installation. It is intended to assist the naval architect and marine engineer in the design of signs for shipboard use, help the shipyard in its initial procurement and installation of shipboard signage, help the ship's crew determine what additional signs are needed during the life cycle of the vessel, and aid in the sign replacement process. There are a number of standards and specifications, both commercial and military, that deal with signage but few are in complete agreement. Research into these standards has resulted in the development of a user-friendly shipboard signage guide, applicable to both military and commercial vessels, which is paraphrased in this paper. Guidance is provided for the most commonly used shipboard signage applications and includes the use of new materials which are less expensive, lighter weight, and more visible even in low or no light conditions. By using this guide, effective signs which offer reduced cost (material and installation) and weight, with improved readability, clarity, and meaning will result. Specific areas addressed include signage types, layout, wording, symbology, physical properties, installation, and cost.


2020 ◽  
Vol 46 (17) ◽  
pp. 26813-26822
Author(s):  
Xianghui Huang ◽  
Fan Zou ◽  
Weiwei Ming ◽  
Jinyang Xu ◽  
Yun Chen ◽  
...  

1997 ◽  
Vol 478 ◽  
Author(s):  
Donald T. Morelli

AbstractA combination of environmental, economic, and technological drivers has led to a reassessment of the potential for using thermoelectric devices in several automotive applications. In order for this technology to achieve its ultimate potential, new materials with enhanced thermoelectric properties are required. Experimental results on the fundamental physical properties of some new thermoelectric materials, including filled skutterudites and 1–1–1 intermetallic semiconductors, are presented.


2018 ◽  
Vol 141 (2) ◽  
Author(s):  
Mohamed A. Shalaby ◽  
Stephen C. Veldhuis

Inconel 100 (IN100) aerospace superalloy is used in manufacturing aero-engine components that operate at intermediate temperatures. It is considered to be a hard-to-cut material. Chipping of the tool edge is one of the major failure mechanisms of ceramic tools in finish cutting of superalloys, which causes a sudden breakage of the cutting edge during machining. Cutting temperature significantly depends on cutting speed. Varying the cutting speed will affect the frictional action during the machining operations. However, proper selection of the cutting variables, especially the cutting speed, can prevent chipping occurrence. In this work, the influence of controlling the cutting speed on the chipping formation in dry finish turning of IN100 aerospace superalloy using SiAlON ceramic tool has been investigated. Scanning electron microscope (SEM)/energy dispersing spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and three-dimensional wear measurements were used to make the investigations of the worn tool edges. It was found that variations of the cutting speeds in a certain range resulted in the generation of different lubricious and protective tribo-films. The presence of these tribo-films at the cutting region proved essential to prevent chipping of the cutting tool edge and to improve its wear resistance during finish turning of age-hardened IN 100 using SiAlON ceramic tools. Chip compression ratio and calculated values of the coefficient of friction at the tool–chip interface confirmed these results.


2020 ◽  
Vol 46 (2) ◽  
pp. 1621-1630 ◽  
Author(s):  
Jianfei Sun ◽  
Shun Huang ◽  
Haitao Ding ◽  
Wuyi Chen

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