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Creep life prediction of IN738 gas turbine blade

Creep life prediction of IN738 gas turbine blade
Creep life prediction of IN738 gas turbine blade
The aim of this study is life prediction of IN738 LC gas turbine blade via Larson- Miller parameter method and fulfilment of some systematic metallographic, creep and hardness tests. Various calculative methods of remaining life prediction have been considered and Larson-Miller parameter method is used in order to predict remaining life of ABB-130 gas turbine blade. By investigation of the metallographic images it was observed that the hardening phase (γ’) becomes bigger after passing of a long time and under high temperature (780 °C) and has been converted from cubic to almost spherical status. It results in a decrease in the strength of the matrix and degradation of alloy’s metallurgical properties and eventually generation of continuous carbides in the grain boundaries, bigness and joining of γ’ particles, grain boundary refining and generation of creep voids, all of which resulted in satisfactorily calculation of remaining life time.
1812-5654
1950-1955
Vaezi, Mohammad
828e14c1-3236-4153-8f69-3837233f48ed
Soleimani, Masoud
47cce97c-aafe-42ef-83ce-f83b32e2eae2
Vaezi, Mohammad
828e14c1-3236-4153-8f69-3837233f48ed
Soleimani, Masoud
47cce97c-aafe-42ef-83ce-f83b32e2eae2

Vaezi, Mohammad and Soleimani, Masoud (2009) Creep life prediction of IN738 gas turbine blade. Journal of Applied Sciences, 9 (10), 1950-1955. (doi:10.3923/jas.2009.1950.1955).

Record type: Article

Abstract

The aim of this study is life prediction of IN738 LC gas turbine blade via Larson- Miller parameter method and fulfilment of some systematic metallographic, creep and hardness tests. Various calculative methods of remaining life prediction have been considered and Larson-Miller parameter method is used in order to predict remaining life of ABB-130 gas turbine blade. By investigation of the metallographic images it was observed that the hardening phase (γ’) becomes bigger after passing of a long time and under high temperature (780 °C) and has been converted from cubic to almost spherical status. It results in a decrease in the strength of the matrix and degradation of alloy’s metallurgical properties and eventually generation of continuous carbides in the grain boundaries, bigness and joining of γ’ particles, grain boundary refining and generation of creep voids, all of which resulted in satisfactorily calculation of remaining life time.

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More information

Published date: 17 April 2009
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 348244
URI: http://eprints.soton.ac.uk/id/eprint/348244
ISSN: 1812-5654
PURE UUID: d77edbe7-fc7a-495f-a6df-aa2110a27d8d

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Date deposited: 11 Feb 2013 10:34
Last modified: 14 Mar 2024 12:56

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Contributors

Author: Mohammad Vaezi
Author: Masoud Soleimani

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