Simultaneous Optimization of Machining Parameters for Dimensional Instability Control in Aero Gas Turbine Components Made of Inconel 718 Alloy-Reference-Cited by-同舟云学术

Simultaneous Optimization of Machining Parameters for Dimensional Instability Control in Aero Gas Turbine Components Made of Inconel 718 Alloy

Published:2000-02-01 Issue:3 Volume:122 Page:586-590
ISSN:1087-1357
Container-title:Journal of Manufacturing Science and Engineering
language:en
Short-container-title:

Author:

Subhas B. K.¹,Bhat Ramaraja¹,Ramachandra K.¹,Balakrishna H. K.²

Affiliation:

1. Gas Turbine Research Establishment, Bangalore, India-560 093

2. Sir M. Visvesvarayya Institute of Technology, Bangalore, India-562 157

Abstract

Aero gas turbine components made of Inconel 718 superalloy revealed significant dimensional instability after machining. The dimensional instability is a manifestation of alterations in residual stresses and microstructure, which are influenced by machining parameters. This paper presents a simultaneous optimization technique used to control the dimensional instability in turning operation. Empirical equations are established for predicting surface residual stresses, surface finish, dimensional instability and tool life using response surface methodology. Experimental results show a strong correlation between residual stresses and dimensional instability. A desirability function approach is used to optimize the multiple responses and machining parameters are derived for practical applications. Inconel 718 test specimen and jet engine components machined with optimal cutting parameters show dimensional instability within the acceptable tolerance band. [S1087-1357(00)01704-4]

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering

Link

http://asmedigitalcollection.asme.org/manufacturingscience/article-pdf/122/3/586/5932378/582_1.pdf

Reference7 articles.

1. Marschall, C. W., and Maringer, R. E., 1977, “Dimensional Instability-An introduction,” International Series of Material Science and Technology, Pergamon Press, Vol. 22.

2. Derringer, G., and Suich, R., 1980, “Simultaneous Optimization of Several Response Variables,” J. Quality Technol. ,12, No. 4, pp. 214–219.

3. Harrington, Jr., E. C., 1965, “The Desirability Function,” Ind. Quality Control, pp. 494–498.

4. Wu, S. M., 1964, “Tool Life Testing by Response Surface Methodology, Part 1 and 2,” ASME J. Eng. Ind., pp. 105–115.

5. Devarajan, N. et al., 1984, “Experimental Method of Predicting Residual Stress due to Turning in Stainless Steel,” J. Exp. Tech., 8, pp. 22–26.

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