The Fibre Fracture Test as a Control of the Toughness of Cast and Rolled Homogeneous Armor
Abstract
The Fibre Fracture Test has been developed as an inspection device to control the processing and heat treatment of armor to insure optimum ballistic properties in the steel at the respective hardnesses which may be involved. The validity of the test has been adequately investigated. It is well suited for process control because of its simplicity and its "go" or "no go" characteristic. It requires no accurately machined specimens or unusual plant equipment. It is applied to the production material after final heat treatment and to the full cross section of the armor involved. The only important difficulty encountered in its application is the problem of obtaining accurate and consistent interpretations among inspectors and producers. In the hands of an experienced person, a careful look at the fracture is all that is required. This experience is necessary, but a knowledge of the significance of the test is also helpful in arriving at a thorough understanding of its purpose and importance. This discussion is intended to assist those responsible for the application and interpretation of the test in the inspection of steel for Ordnance applications, particularly armor.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 1944
- Accession Number
- ADA953806