Journal of
Mechanical Engineering Research

  • Abbreviation: J. Mech. Eng. Res.
  • Language: English
  • ISSN: 2141-2383
  • DOI: 10.5897/JMER
  • Start Year: 2009
  • Published Articles: 119

Full Length Research Paper

Analysis of phase transformations in steel using online monitoring technique - Acoustic emission

  Venkata Siva S. B.1*, Srinivas P. S.2 and Mahesh Kumar M.3        
  1Department of Mechanical Engineering, G. I. E. T., Gunupur, Orissa, A.P, India. 2Department of Mechanical Engineering, V. R. S. E. C., Vijayawada, A.P, India. 3Metallurgy Department, BHEL (R&D), Hyderabad, A.P., India.
Email: [email protected]

  •  Accepted: 08 June 2011
  •  Published: 30 September 2011

Abstract

 

Steel is one of the most commonly used materials today, especially in industrial sectors such as ship building, automobile industry and in power plants. In order to meet the requirements for steel applications, new steels are being developed. In the present study, experiments are carried out to distinguish different phases using on-line monitoring technique - Acoustic Emission (AE). The main objective of this work is to a better understanding of the growth mechanism and solid-state phase transformations that can occur in carbon steel. In view of the fact that AE is an unexplored technique in this kind of steel research, this study also aims to give a good overview of the possibilities and limitations of AE, as a real time monitoring technique for the evolution of bainitic and martensite phase transformations. It was found from the experiments that the basic parameters by which the phase transformation can be found out are energy, counts, RMS and amplitude. By analyzing the obtained AE data, it is possible to study the phase transformation behavior.

 

Key words: Steel, online monitoring, acoustic emission, energy, counts, RMS, phase transformations and amplitude.