Accession Number : ADA954155

Title :   Study of 'Woody' Fractures in Rolled Armor Plate.

Descriptive Note : Memorandum rept.,

Corporate Author : WATERTOWN ARSENAL LABS MA

Personal Author(s) : Reed,E. L.

Report Date : 19 JUN 1944

Pagination or Media Count : 29

Abstract : This 1944 report investigates a series of 3/4 in., 1 in., and 1 1/2 in. thick steel plates which showed a marked tendency toward 'woody' fractures. The 'woody' fracture usually has a fine striated appearance and shows occasionally evidence of ruptured fibres. The 'woody' condition develops when the fracture plane is parallel to the major rolling direction and is caused by the presence of fine nonmetallic inclusions in the planes of rupture which have a 'stepped' appearance. The types of inclusions generally found in the steels investigated which exhibit 'woody' fractures are silicates or complex oxide-sulphide-silicates. Occasionally, streaks of titanium nitride or complex oxides associated with zirconium nitrides are found which also result in the same effect. The nonmetallic inclusions are occasionally associated with metallic banding. The degree of 'woody' appearance increases with the quantity of nonmetallic inclusions as well as the inequality-in-reduction in the two rolling directions.

Descriptors :   *FRACTURE(MECHANICS), *ARMOR PLATE, WOOD

Subject Categories : Armor
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE