Accession Number:

ADA545071

Title:

Fibre Laser Welding of HY-80 Steel: Procedure Development and Testing

Descriptive Note:

Technical memorandum

Corporate Author:

DEFENCE RESEARCH AND DEVELOPMENT ATLANTIC DARTMOUTH (CANADA)

Report Date:

2010-09-01

Pagination or Media Count:

44.0

Abstract:

The metallurgical and mechanical properties of a series of autogeous fibre laser welded joints were carried out. These welds were made between two butt joined slices of 5 mm thick HY-80 material over a range of heat inputs extending from 75 to 240 Jmm. Apart from the increasing width of the fusion and heat affected zones with increased heat input, the metallurgical structures of the welds were similar. In all cases, the fusion zone of the weld was found to have the consistent hardness of an untempered martensite. Mechanical characterization of the welds showed that while the tensile strength exceeded the base metal requirements, under impact loading conditions the fusion zone failed in a brittle manner.

Subject Categories:

  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE