Deformation behavior of a 16-8-2 GTA weld as influenced by its solidification substructure
Weldment sections from formed and welded type 316 stainless steel pipe are characterized with respect to some time-independent (tensile) and time-dependent (creep) mechanical properties at temperatures between 25/sup 0/C and 649/sup 0/C. The GTA weldment, welded with 16-8-2 filler metal, is sectioned from pipe in the formed + welded + solution annealed + straightened condition, as well as in the same condition with an additional re-solution treatment. Detailed room temperature microhardness measurements on these sections before and after reannealing enable a determination of the different recovery characteristics of weld and base metal. The observed stable weld metal solidification dislocation substructure in comparison with the base metal random dislocation structure, in fact, adequately explains weld/base metal elevated temperature mechanical behavior differences from this recovery characteristic standpoint. The weld metal substructure is the only parameter common to the variety of austenitic stainless steel welds exhibiting the consistent parent/weld metal deformation behavior differences described. As such, it must be considered the key to understanding weldment mechanical behavior.
- Research Organization:
- Univ. of Cincinnati, OH
- OSTI ID:
- 6244528
- Journal Information:
- Metall. Trans., A; (United States), Vol. 14A
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STAINLESS STEEL-316
WELDED JOINTS
MECHANICAL PROPERTIES
DEFORMATION
ELECTRON MICROSCOPY
GAS TUNGSTEN-ARC WELDING
MICROHARDNESS
PIPES
ALLOYS
ARC WELDING
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
FABRICATION
HARDNESS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS
MICROSCOPY
MOLYBDENUM ALLOYS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
WELDING
360103* - Metals & Alloys- Mechanical Properties