Effects of ‘streaks’ on the fracture toughness of chromium-molybdenum rail steel
Date of Original Version
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.
Canadian Metallurgical Quarterly
Kalousek, J., D. E. Parsons, and H. Ghonem. "Effects of ‘streaks’ on the fracture toughness of chromium-molybdenum rail steel." Canadian Metallurgical Quarterly 21, 1 (1982): 25-30. doi:10.1179/cmq.19126.96.36.199.