Comparative assessment of fatigue and fracture behaviour of cast and forged railway wheels

Tarafder, S and Sivaprasad, S and Ranganath, VR (2007) Comparative assessment of fatigue and fracture behaviour of cast and forged railway wheels. Fatigue amp; Fracture of Engineering Materials and Structures, 30 (9). pp. 863-876.

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Abstract

A comparative evaluation of fatigue and fracture behaviour of commercially produced cast13; and forged rail wheels has been made using specimens extracted from various locations of13; the wheel quadrant. A systematic investigation in the web and rim regions of the wheel13; quadrant with various notch orientations showed that the forged material exhibited a13; better intrinsic resistance to fatigue crack growth than the cast material. Since linear13; elastic fracture mechanics (LEFM) based fracture toughness could not be validated for13; both the cast and forged wheel material, elastic plastic fracture mechanics (EPFM) based13; characteristic fracture toughness was used. Results showed that fracture resistance of the13; forged material is superior to that of the cast material. Cast wheel specimens exhibited13; unstable crack extension in comparison to substantial stable tearing in forged specimens.13; Microstructural and fractographic analyses showed that the cast wheel material contained13; large amounts of inclusions. The poor fracture resistance of cast wheel material is therefore13; attributed to the inferior material quality.

Item Type:	Article
Additional Information:	Copyright for this article belongs to Wiley Interscience
Uncontrolled Keywords:	Cast and forged rail wheels;FCGR;Fracture
Subjects:	AERONAUTICS > Aeronautics (General)
Depositing User:	Ms. Alphones Mary
Date Deposited:	03 Jun 2009
Last Modified:	17 Jun 2010 09:42
URI:	http://nal-ir.nal.res.in/id/eprint/5144

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