Dynamic stresses in weld metal hot cracking
- Oak Ridge National Lab., TN (United States). Materials Process Modeling Group
This paper presents the results of a study aimed at understanding the influence of dynamic stresses, induced by thermal and mechanical loading, on weld metal hot cracking. The study attempts to resolve the relationship between the dynamic stress distribution in the specimen, particularly near the trailing edge of the pool, and the observed cracking behavior in a Sigmajig test specimen. The transient stress distribution in the specimen resulting from mechanical and thermal loading was calculated for a Type 316 stainless steel specimen. The initiation and propagation of the crack during welding was visually monitored using a stroboscopic vision system. The numerical results were used to understand the initiation and propagation of weld metal hot cracks during controlled welding of a specimen subjected to external restraint. The results of this study indicate that for hot cracking to occur, there exists a dynamic relationship between the metallurgical and mechanical factors, which can be influenced by the welding conditions and mechanical restraint.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7105275
- Journal Information:
- Welding Journal (Miami); (United States), Vol. 73:7; ISSN 0043-2296
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STAINLESS STEEL-316
WELDED JOINTS
WELDING
CRACK PROPAGATION
SOLIDIFICATION
THERMAL STRESSES
WELDABILITY
ALLOYS
AUSTENITIC STEELS
CHROMIUM ALLOYS
CHROMIUM-MOLYBDENUM STEELS
CHROMIUM-NICKEL STEELS
CHROMIUM-NICKEL-MOLYBDENUM STEELS
CORROSION
FABRICATION
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
STAINLESS STEELS
STEEL-CR17NI12MO3
STEELS
STRESSES
360101* - Metals & Alloys- Preparation & Fabrication
360103 - Metals & Alloys- Mechanical Properties