LARGE MOTOR CASE TECHNOLOGY EVALUATION
BOEING AEROSPACE CO SEATTLE WA
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This work has proceeded with emphasis placed on development of 9Ni alloy test data required to help confirm results of the earlier statistical efforts. This resulted in the fabrication and testing of one 9Ni subsize motor case and the testing of several welded fracture and tensile specimens. The 9Ni weldment specimen tests consisted of limited tensile, edge notched bend, and surface flawed specimens taken from panels 0.80-inch and 0.50-inch thick. Compositions of base metal and weldwire are shown. Plates were heat treated prior to welding, and retempered after welding. Weld settings and edge preparation utilized were dictated by the results of the earlier statistical weld development efforts, and were expected to result in near optimum characteristics of properties and quality. Weld quality, as determined by visual, penetrant, and radiographic inspection, was acceptable no cracks were observed, some scattered porosity up to 0.06 diameter was apparent.
- Properties of Metals and Alloys