- Gerstle, F.P., Jr. and Follansbee, P.S. and Pearsall, G.W. and Shepard, M.L., Thermoplastic shear and fracture of steel during high-velocity sliding [rocket-sled testing],
Wear (Switzerland), vol. 24 no. 1
pp. 97 - 106 .
(last updated on 2007/04/10)
A steel rail, severely gouged during a rocket-sled test, was the focus of an investigation of the microstructural changes which occur during high-velocity, sliding contact. Metallographic analysis of the damaged rail indicated that the mechanism of gouging probably was a crude machining process in which the sled shoe played the role of a tool. Cracks in bands of martensite and severely distorted pearlite regions were the principal microscopic features of the subsurface damage; the overall configuration of the pattern of cracks and martensite bands suggests that they formed as a result of catastrophic thermoplastic shear
dynamic testing;fracture;materials testing;metallography;steel;wear;