Effects of ‘streaks’ on the fracture toughness of chromium-molybdenum rail steel

Document Type

Article

Date of Original Version

1-1-1982

Abstract

Microstructural inhomogenities or ‘streaks’ of lower bainite were found in the webs of experimental ingot and continuously cast Cr- Mo steel rails. The effect of these inhomogenities on the fracture toughness behaviour of rail web steels was investigated by means of miniature compact tension specimens (W = 13.5 mm) and compared to results obtained from similar specimens taken from 1% Cr and carbon rail steels. It was concluded that the bainite ‘streaks’ did not lead to a loss of fracture toughness and that KQ values obtained from miniature specimens were comparable to those determined from standard compact tension specimens (W = 25.4 mm) taken from rail heads of corresponding rail steels. © 1982 Maney Publishing.

Publication Title, e.g., Journal

Canadian Metallurgical Quarterly

Volume

21

Issue

1

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