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Status
Electronic Resource
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Publication
SAND Report: SAND82-8206, March 1982.
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Library's review
ABSTRACT:
Tubing for "Solar One" receiver panels is joined by longitudinal welds using a low heat input welding process. Concern existed that lack-of-fusion defects (crack-like notches at the root of the weld) created by this welding process would propagate during diurnal thermal cycling. If crack
Tubing for "Solar One" receiver panels is joined by longitudinal welds using a low heat input welding process. Concern existed that lack-of-fusion defects (crack-like notches at the root of the weld) created by this welding process would propagate during diurnal thermal cycling. If crack
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propagation occurred at these defects, it could shorten the life of the receiver tube panels. An experiment which simulated key elements of the receiver cyclic thermal strain environment was designed to address this concern. During the experiment, receiver tube weldments (welds prepared in the laboratory) were thermally cycled for 15,000 cycles. They were subsequently examined metallographically for crack propagation. Results of this examination revealed that no crack propagation occurred during the test. Show Less