High-Temperature Fatigue Fracture Initiation in MgO Single Crystals

The fatigue response of single‐crystal MgO in compressive‐compressive loading was characterized at 800° and 1300°C. Fracture initiation mechanisms were observed for specimens loaded in and directions; these loading directions independently activated the primary and secondary slip systems, respective...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1972-01, Vol.55 (1), p.11-13
Main Authors: STINCHCOMB, W. W., QUEENEY, R. A.
Format: Article
Language:English
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Summary:The fatigue response of single‐crystal MgO in compressive‐compressive loading was characterized at 800° and 1300°C. Fracture initiation mechanisms were observed for specimens loaded in and directions; these loading directions independently activated the primary and secondary slip systems, respectively. For both loading directions, failure at 800°C resulted from cleavage cracks formed between parallel slipbands and that at 1300°C occurred at slipband intersections. At both temperatures, (111) slip was observed for cyclic loading in the direction.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1972.tb13386.x