. Report of the chief of the Division of Safety covering the investigation of an accident which occurred on the Baltimore . No. 6.—Track wheels, showing fractured surface of axle just below face of hub. The metallographic examination, taken at four places on the circum-ference. 90c apart, showed identical structure throughout. Tensile tests were made on the metal of the section covered by thewheel fit near the place of fracture. The tests represented the metal,in a Longitudinal direction, near the circumference, one-quarter belowthe surface, and at the center of the axle. Specimens were taken
. Report of the chief of the Division of Safety covering the investigation of an accident which occurred on the Baltimore . No. 6.—Track wheels, showing fractured surface of axle just below face of hub. The metallographic examination, taken at four places on the circum-ference. 90c apart, showed identical structure throughout. Tensile tests were made on the metal of the section covered by thewheel fit near the place of fracture. The tests represented the metal,in a Longitudinal direction, near the circumference, one-quarter belowthe surface, and at the center of the axle. Specimens were taken outin duplicate, one set being tested in the natural state of the metalin the forging and one set after the metal was annealed. Three ad-ditional specimens were taken from the axle near the middle of itslength, in a crosswise —in 2 10 INTERSTATE COMMERCE COMMISSION. The results of the tensile tests were as follows (specimens by 2 inches long) : I ,iir;ii ion. Tensile strength, per square inch. Longitudinal specimens, natural state of forging: Pounds. Near circumference 75,800 One quarte
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbaltimoreandohiorail
