Grinding of superalloys with high performance wheels: evaluation of process performance

• Grant number: 16/12425-4
• Support Opportunities: Scholarships in Brazil - Master
• Start date: November 01, 2016
• End date: November 30, 2018
• Field of knowledge: Engineering - Mechanical Engineering - Manufacturing Processes
• Principal Investigator: Eraldo Jannone da Silva
• Grantee: Adriel Magalhães Souza
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

Superalloys are generally used as materials in automotive and aviation industries, and can also be applied in nuclear power plants. They are considered difficult to grind (DTG) materials because of their peculiar characteristics, such as: low thermal conductivity, high strain hardening tendency, and high affinity for metal tools. Thus, they require the use of grinding processes and high-performance, wear-resistant abrasive tools. In order to optimize the productivity-cost ratio, grinding systems used in the production of components with superalloys are often built with vitrified cBN wheels. However, peripheral and auxiliary systems are required for their use. Conventional grinding wheels with Seeded-gel (SG) grains, usually called "ceramics", emerge as a promising alternative for grinding DTG materials. The aim of this study is to evaluate the grinding process of nickel-chromium-based superalloys when using a conventional ceramic-grain and high-performance-bond grinding wheel. The results will be compared to the ones obtained when using a vitrified cBN wheel. The hypothesis of the applicability of high-performance grinding wheels during the grinding of DTG materials will be investigated through the analysis of the influence of input variables (specific material removal rates, cutting speed, and materials used) on the monitored outputs variables (grinding power, specific energy, and G ratio), and on the quality of the sample (the assessment of surface finishing, roundness and microstructural analysis of the ground workpiece). As a result, the main wheel wear mechanism will be determined when grinding superalloys with high-performance wheels. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

NAMETALA, CINIRO APARECIDO LEITE; SOUZA, ADRIEL MAGALHAES; JUNIOR, BENVINDO RODRIGUES PEREIRA; SILVA, ERALDO JANNONE DA. A simulator based on artificial neural networks and NSGA-II for prediction and optimization of the grinding process of superalloys with high performance grinding wheels. CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY, v. 30, AUG 2020. (16/12425-4)

SOUZA, ADRIEL MAGALHSES; DA SILVA, ERALDO JANNONE. Global strategy of grinding wheel performance evaluation applied to grinding of superalloys. PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, v. 57, p. 113-126, MAY 2019. (16/12425-4, 15/22121-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SOUZA, Adriel Magalhães. Grinding of superalloys with high performance grinding wheels: process performance evaluation. 2018. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.