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PROCEEDINGS - Evaluation of Welding Issues in High Nickel and Stainless Steel Alloys for Advanced Energy Systems

Session I - Materials Application in DOE Energy Systems

Overview of DOE Energy Systems: Fossil Energy Power Systems
Rich Dennis, National Energy Technology Laboratory

Energy Efficiency and Renewable Energy Power Systems
Rajgopal Vijaykumar, DOE Office of Energy Efficiency and Renewable Energy

Recent Developments in the Welding of Alloy 740H
Jack Debarbadillo, Special Metals

STEP Heater Fabrication: Welding of Inconel 740H
Matt Hauth, Optimus Industries LLC

Session II - Invited Presentations on Welding

Mechanical Failure Risk Analysis and Management for In-Service CSP Nitrate Hot Tanks
Judith Vidal, National Renewable Energy Laboratory
Zhenzhen Yu, Colorado School of Mines

Power Generation Industry Experience: Relaxation Cracking and Strain Induced Precipitation Hardening (SIPH) Failures
John Shingledecker, EPRI
John Seifert, EPRI

Challenges Obtaining and Implementing Welding Alloys for High Temperature Stainless and Super Nickel Steel Weldments
Bill Newell, Euroweld Ltd.

Microstructure and Mechanism Based Lifetime Predictions in Stress Relief Cracking of SS347 Weldment Under Complex Thermomechanical Conditions
Zhili Feng, Oak Ridge National Laboratory

Metallurgical Phenomena Related to the High Temperature Performance of Dissimilar Metal Welds Between Austenitic and Ferritic Alloys
Boian Alexandrov, Ohio State University

Performance of Dissimilar Metal Welds in Supercritical CO2 Power Cycle Conditions
Omer Dogan, National Energy Technology Laboratory

Session III - Panel Discussion – Assessment of Weldability Issues and Potential Pathways to Cracking Control

Panelists:
Michael Phillips, Aecon-Wachs
John Shingledecker, EPRI
Zhili Feng, Oak Ridge National Laboratory
Boian Alexandrov, Ohio State University
Judith Vidal, National Renewable Energy Laboratory
Bill Newell, EuroWeld Ltd.

Next Steps
Rich Dennis, National Energy Technology Laboratory
Kamala Raghavan, DOE Office of Energy Efficiency and Renewable Energy