Stress determination in thermally grown alumina scales using ruby luminescence
Conference
·
OSTI ID:238352
- Argonne National Lab., IL (United States)
- Lawrence Berkeley Lab., CA (United States)
By exploiting the strain dependence of the ruby luminescence line, we have measured the strain in alumina scales thermally grown on Fe-Cr- Al alloys. Results are compared and found to be reasonably consistent with strains determined using x rays. Oxidation studies were carried out on alloys Fe - 5Cr - 28Al and Fe - 18Cr - 10Al (at.%). Significantly different levels of strain buildup were observed in scales on these alloys. Results on similar alloys containing a ``reactive element`` (Zr or Hf) in dilute quantity are also presented. Scales on alloys containing a reactive element (RE) can support significantly higher strains than scales on RE-free alloys. With the luminescence technique, strain relief associated with spallation thresholds is readily observed.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Electric Power Research Inst., Palo Alto, CA (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 238352
- Report Number(s):
- ANL/MSD/CP--88406; CONF-960401--34; ON: DE96011131; CNN: Contract RP 8041-05
- Country of Publication:
- United States
- Language:
- English
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