This presentation is intended only for the individual or entity to which it is addressed and may contain information that is the Confidential and/or Proprietary Information of Woodward, Inc., the disclosure of which may be in violation of applicable law. If you are not the intended recipient, or an employee or agent responsible for delivery to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this message is strictly prohibited and you are requested to notify us immediately by telephone. Industrial Turbomachinery Systems 2015 UTSR Fellowship Dean Sage July 25 th , 2015
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This presentation is intended only for the individual or entity to which it is addressed and may contain information that is the Confidential and/or Proprietary Information of
Woodward, Inc., the disclosure of which may be in violation of applicable law. If you are not the intended recipient, or an employee or agent responsible for delivery to the
intended recipient, you are hereby notified that any dissemination, distribution, or copying of this message is strictly prohibited and you are requested to notify us
immediately by telephone.
Industrial Turbomachinery Systems
2015 UTSR Fellowship
Dean Sage
July 25th, 2015
Industrial Turbomachinery Systems
Background
School: University of Florida
Materials Science and Engineering
Agricultural and Biological Engineering
Department: NPI Engineering
Supervisor: Mark Dieringer
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Industrial Turbomachinery Systems
Where I’m From
• If you go far enough south, you get back to the North
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Industrial Turbomachinery Systems
It’s not like the South.
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Industrial Turbomachinery Systems
Main Projects
• Weld Issues
• Igniter Failures
• Greenbelt Projects
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Weld Issues
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Industrial Turbomachinery Systems
Derek P.
• Undercut in 316 SS bar-tube welds
• Tail off cracks in 304-HastX welds
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Industrial Turbomachinery Systems
Undercut
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Undercut Cont.
• Geometric and microstructural differences in tube and
bar stock, among other factors, cause undercut with this
material combination.
• Solution: Change weld parameters
Weld Pass:
- Decrease amperage and travel speed by ~35%
Cap Pass:
- Defocus beam ~15%
- Change beam figure
- Increase beam width ~10%
- Decrease travel speed ~35%
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Industrial Turbomachinery Systems
Undercut Cont.
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Industrial Turbomachinery Systems
Tail off Cracks in 304-HastX Welds
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Industrial Turbomachinery Systems
Tail off Cracks Cont.
• Weld puddle carries impurities, causing for a higher
concentration where the weld ends.
• Higher concentration of impurities causes cracking.