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Strain Hardening Exponents and Strength Coefficients for Aeroengine Isotropic Metallic Materials – a Reverse Engineering Approach by R. Rajendran; M. Venkateshwarlu; Vijay Petley; Shweta Verma is a Engineering article available to read on EtoBox.

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## Abstract The strain hardening exponent and strength coefficient of the Ramberg-Osgood flow rule are required for the accurate design analysis of the materials of aeroengine components. A direct method of deriving these parameters involves the processing of the complete raw data of tensile testing as per ASTM E-646. More often, a first design effort of aeroengine components is made using catalogue data, as the evaluation of material tensile properties is a time-consuming process that takes place concurrently. Catalogue-supplied data on the monotonic loading typically contains elastic modulus, 0.2% proof stress, and ultimate tensile stress along with other data for various temperatures. A methodology was evolved in this work to construct the Ramberg-Osgood flow rule with these three parameters and was validated with laboratory test results and published data through a comparison with ASTM E-646. The strain hardening exponents and strength coefficients were established for a family of aeroengine metallic materials for various temperatures, which can serve as a first design effort input.

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Author

R. Rajendran; M. Venkateshwarlu; Vijay Petley; Shweta Verma

Publisher

Walter de Gruyter GmbH

Published

2014

Language

EN

Field

Engineering (Physical Sciences)