Weld heat-affected-zone response to elevated-temperature deformation
Journal Article
·
· Welding Journal
OSTI ID:398314
- Rensselaer Polytechnic Inst., Troy, NY (United States)
The mechanical response to elevated-temperature deformation was assessed for weld heat-affected-zone (HAZ) and base-metal microstructures in 2.25Cr-1Mo steel. A constant-displacement-rate (CDR) test, capable of determining long-time, notch-sensitivity tendencies, was implemented on a Gleeble 1,500 thermal/mechanical simulator and an Instron. Microstructures representative of the coarse-grained, grain-refined, and intercritical regions of the HAZ were simulated on a Gleeble. Microstructural reproduction reflected the preheat and postweld heat treatments in accordance with the required codes. A K{sub 1} analysis of the data was conducted, which showed that small-scale yielding criteria were adhered to throughout the test. The test results indicated that the high-temperature extensometer control of the Instron was better able to maintain stable crack growth after peak load than the crosshead control of the Gleeble. The CDR test was seen to be an effective, short-time procedure to delineate and compare the strength and relative service life of the structures present in the weld HAZ.
- OSTI ID:
- 398314
- Journal Information:
- Welding Journal, Journal Name: Welding Journal Journal Issue: 11 Vol. 75; ISSN 0043-2296; ISSN WEJUA3
- Country of Publication:
- United States
- Language:
- English
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