RESPONSE OF THE DELTA TEST TO SPECIMEN VARIABLES

The Delta specimen has been applied to two different heats of A517 grade steel in one inch plate thickness and to the one heat in 1/2 and 2 inch plate thickness. Various modifications of the basic specimen have been investigated, a non-standard geometry and a composite form of the specimen into which different steel types were incorporated. The influences of various welding procedures have been examined as well as the performance of all steels in the non-welded condition. The specimen was found applicable and appropriate for all conditions tested, showing sensitivity to all variables. At the same time the specimen showed a consistency in behavior which could be rationalized with commercial experience and data from corollary tests. The steels examined showed several transitional behaviors when tested as weldments, these transitions occurring in place of fracture, length of fracture, load carrying changes and overall ductility measured by deflection at failure.

• Supplemental Notes:
  • Performed under Naval Ship Engineering Center Contract No. N00024-C-5463.
• Corporate Authors:

  Lafayette College

  Easton, PA  United States 
• Authors:
  • McGeady, L J
• Publication Date: 1971-9

Media Info

• Features: References;
• Pagination: 42 p.

Subject/Index Terms

• TRT Terms: Fracture properties; Heat affected zone (Metals); Welding
• Identifier Terms: Ship Structure Committee
• Uncontrolled Terms: Weldability
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00028999
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: SSC-221
• Files: TRIS
• Created Date: Apr 21 1972 12:00AM