Weldability of general purpose heat source new process iridium

Technical Report · Fri May 01 04:00:00 EDT 1987

OSTI ID:6377011

Kanne, W R

Weldability test results show that iridium produced by the new Oak Ridge National Laboratory (ORNL) process is less susceptible to cracking than old process iridium. Seventeen capsules were welded (for a total of 255 welds) in four categories, and the number of cracks in the welds was counted as the criterion for weldability. Results also indicate that the 1500C iridium shell heat treatment at Mound Facility has little effect on weld cracking. Long weld quenches had fewer cracks than did short quenches, confirming that the present production procedure is the preferred procedure. Ultrasonic test indications were confirmed to be either cracks or other defects. Metallographic examination showed the metallurgical structure of the welds to be typical and unaffected by the category of material.

• Research Organization: Savannah River Lab., Aiken, SC (USA)
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6377011
• Report Number(s): DP-1748; ON: DE87012848
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
CRACK PROPAGATION
ELEMENTS
HEAT TREATMENTS
IRIDIUM
MATERIALS TESTING
METALS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
PLATINUM METALS
TESTING
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
WELDABILITY