Accession Number:

ADA257674

Title:

LAV Armor Plate Study

Descriptive Note:

Final rept.

Corporate Author:

ARMY LAB COMMAND WATERTOWN MA MATERIALTECHNOLOGY LAB

Report Date:

1992-04-01

Pagination or Media Count:

31.0

Abstract:

This study was undertaken to determine the cause of cracking in high hard armor steel plates used in the manufacture of light armored vehicles LAVs and to make recommendations to alleviate the problem. Cracks in several components from fielded vehicles were analyzed. In many cases the cracking was found to be caused by improper edge preparation in cutting the steel which resulted in environmentally-assisted cracking. Cracks were also observed starting from welds which were attributed to a number of possible causes stress-corrosion cracking, hydrogen-assisted cold cracking, and cracking due to extremely harsh vehicle use. Base metal mechanical properties, including hardness, tensile strength, and Charpy V-notch impact energy were measured from room temperature to -40 deg F -40 deg C. Ballistic properties were measured and the propensity of the steel to crack under ballistic impact conditions was also evaluated. Additionally, the study involved a review of MIL-A-46100 and the new Canadian Material Specification, CMS-18. Steel armor, Welding, High hardness armor, Mechanical properties Light armored vehicles LAV, Cracking.

Subject Categories:

  • Properties of Metals and Alloys
  • Combat Vehicles
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE